Stainless Steel Pipe and Tube

Stainless steel pipe is a hollow long round steel with a surface resistance of less than 1000 megagrams; wear protection; retractable; excellent chemical resistance; good alkali and acid resistance; . Stainless steel pipes are widely used in industrial transportation pipelines such as petroleum, chemical, medical, food, light industry, mechanical instrumentation, and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures. Also used as furniture and kitchenware.

Classification of stainless steel pipes
Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, and bimetallic composite pipes, coatings and coated pipes for saving precious metals and meeting special requirements. . Stainless steel tubes are available in a wide variety of applications, with different technical requirements and different production methods. The outer diameter of the currently produced steel pipe ranges from 0.1 to 4500 mm and the wall thickness ranges from 0.01 to 250 mm. In order to distinguish the characteristics, the steel pipes are usually classified as follows.
Stainless steel pipes are divided into two types according to production methods: seamless pipes and welded pipes. Seamless steel pipes can be divided into hot rolled pipes, cold rolled pipes, cold drawn pipes and extruded pipes. Cold drawing and cold rolling are secondary to steel pipes. Processing; welded pipes are divided into straight welded pipes and spiral welded pipes.
Section shape
Stainless steel tubes can be divided into round tubes and shaped tubes according to the cross-sectional shape. The special-shaped tube has a rectangular tube, a rhombic tube, an elliptical tube, a hexagonal tube, an eight-sided tube, and various cross-section asymmetric tubes. Shaped tubes are widely used in a variety of structural parts, tools and mechanical parts. Compared with the round pipe, the special-shaped pipe generally has a large moment of inertia and a section modulus, and has a large bending and torsion resistance, which can greatly reduce the structural weight and save steel.
Stainless steel pipes can be divided into equal-section pipes and variable-section pipes according to the longitudinal section shape. The variable section pipe has a conical pipe, a stepped pipe and a periodic section pipe.
Tube end shape
The stainless steel tube can be divided into a light pipe and a wire tube (threaded steel pipe) according to the state of the pipe end. The wire tube can be divided into ordinary car wire tube (transfer water, gas and other low pressure pipes, using ordinary cylindrical or conical pipe thread connection) and special threaded pipe (oil, geological drilling pipe, for important wire pipe, use Special thread connection), for some special tubes, in order to compensate for the influence of the thread on the strength of the tube end, the tube end is usually thickened (inner thickening, outer thickening or inner and outer thickening) before the wire.
Use classification
According to the application, it can be divided into oil well pipe (casing, oil pipe and drill pipe, etc.), pipeline pipe, boiler pipe, mechanical structural pipe, hydraulic pillar pipe, gas cylinder pipe, geological pipe, chemical pipe (high pressure fertilizer pipe, petroleum cracking pipe). ) and ships and other pipes.

Hardness
Stainless steel pipes are generally measured by Brinell, Rockwell and Vickers hardness indexes.
Brinell hardness
Among the stainless steel pipe standards, Brinell hardness is the most widely used, and the hardness of the material is often expressed by the indentation diameter, which is both intuitive and convenient. However, it is not suitable for steel pipes of harder or thinner steel.
Rockwell hardness
The stainless steel tube Rockwell hardness test is the same as the Brinell hardness test. The difference is that it measures the depth of the indentation. The Rockwell hardness test is a widely used method in which HRC is used in steel pipe standards only after Brinell hardness HB. Rockwell hardness can be applied to the determination of metal materials from very soft to very hard, which makes up for the Brinell method. It is simpler than the Brinell method and can directly read the hardness value from the dial of the hardness machine. However, the hardness value is not as accurate as the Brinell method because of its small indentation.
Vickers hardness
The stainless steel tube Vickers hardness test is also an indentation test method for measuring very thin metal materials and surface layer hardness. It has the main advantages of Brinell and Rockwell methods, and overcomes their basic shortcomings, but it is not as simple as the Rockwell method. The Vickers method is rarely used in steel pipe standards.
Hardness test
The stainless steel tube has an inner diameter of 6.0mm or more and an annealed stainless steel tube with a wall thickness of 13mm or less. It can be a W-B75 type Vickers hardness tester. It is very fast and simple to test and is suitable for rapid and non-destructive inspection of stainless steel pipes. The stainless steel tube with an inner diameter of more than 30 mm and a wall thickness of more than 1.2 mm is tested by a Rockwell hardness tester to test the hardness of HRB and HRC. Stainless steel tubes with an inner diameter of more than 30 mm and a wall thickness of less than 1.2 mm are tested with a surface Rockwell hardness tester to test HRT or HRN hardness. For stainless steel pipes with an inner diameter of less than 0 mm and greater than 4.8 mm, the HR15T hardness is tested using a special Rockwell hardness tester for pipes. When the inner diameter of the stainless steel tube is larger than 26 mm, the hardness of the inner wall of the tube can also be tested by a Rockwell or surface Rockwell hardness tester.

Types of stainless steel pipes:
Stainless steel seamless pipe
The stainless steel seamless pipe is a long strip of steel with a hollow section and no seams around it. The thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, the greater the processing cost.
The process of the product determines its limited performance. Generally, the seamless steel pipe has low precision: uneven wall thickness, low brightness inside and outside the pipe, high fixed-length cost, and pitting and black spots on the inside and outside, and its detection; Shaping must be processed offline. Therefore, it embodies its superiority in high-pressure, high-strength, mechanical structural materials.
Hot rolling, hot extrusion and cold drawing (rolling) of stainless steel tubes by rolling method.
According to stainless steel metallographic structure, semi-ferritic semi-Martens stainless steel seamless pipe, martensitic stainless steel seamless pipe, austenitic stainless steel seamless pipe, austenitic-ferritic iron stainless steel seamless pipe, etc. .
According to different production methods, it can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe and extruded pipe.
1.1. Hot-rolled stainless steel seamless pipes are generally produced on automatic rolling mills. The solid tube blank is inspected and the surface defects are removed, cut into the required length, centered on the end face of the perforated end of the tube blank, then sent to a heating furnace for heating and perforated on the punching machine. At the same time, the perforation is continuously rotated and advanced. Under the action of the roll and the head, a cavity is gradually formed inside the tube blank, which is called a capillary tube. It is sent to the automatic pipe mill for further rolling. Finally, the whole machine is uniform in wall thickness, and the sizing machine is sizing to meet the specification. The production of hot-rolled seamless steel tubes by continuous rolling mills is a more advanced method.
1.2. If you want to obtain seamless pipes of smaller size and better quality, you must use cold rolling, cold drawing or a combination of the two. Cold rolling is usually carried out on a two-roll mill in which the steel pipe is rolled in an annular hole formed by a variable-section circular hole groove and a stationary tapered head. Cold drawing is usually carried out on a single-chain or double-chain cold drawing machine of 0.5 to 100T.
1.3. Extrusion method The tube blank to be heated is placed in a closed extrusion cylinder, and the perforated rod moves together with the extrusion rod to extrude the extrusion from the smaller mold hole. This method can produce steel pipes with smaller diameters.
Such steel pipes can be divided into two categories: stainless steel seamless steel pipe and stainless steel welded steel pipe (with seam pipe), which can be different according to the manufacturing process.
For the following basic types: hot rolling, extrusion, cold drawing and cold rolling, they can be divided into round pipes and special-shaped pipes according to the shape of the section. Circular steel pipes are widely used, but there are also some square, rectangular and semi-circular shapes. Hexagonal, equilateral triangle, octagonal and other shaped stainless steel pipes.
For steel pipes subjected to fluid pressure, hydraulic tests shall be carried out to test the pressure resistance and quality. No leakage, wetting or expansion shall occur under the specified pressure. Some steel pipes shall be subjected to the crimping test according to the standard or the requirements of the purchaser. , flare test, flattening test.
Seamless stainless steel pipe, also called stainless steel seamless pipe, is made of steel ingot or solid pipe blank through perforation, and then made by hot rolling, cold rolling or cold drawing. The specification of seamless steel pipe is expressed by the outer diameter * wall thickness mm number
mandrel mill - Stainless Steel Pipe and Tube
Stainless steel seamless pipe manufacturing process
1. Hot rolling (extrusion seamless steel pipe): round billet → heating → perforation → three-roll cross-rolling, continuous rolling or extrusion → pipe removal → sizing (or reducing diameter) → cooling → straightening → hydraulic test (or flaw detection) → mark → warehousing
The raw material for rolling the seamless pipe is a round tube blank, and the round tube blank is cut into a blank having a length of about 1 m by a cutting machine, and sent to a furnace for heating via a conveyor belt. The billet is fed into a furnace and heated to a temperature of approximately 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round billet is released, it is subjected to a through-hole punching machine. The more common perforating machine is a conical roller punching machine. This perforating machine has high production efficiency, good product quality, large diameter of perforation and can wear a variety of steel types. After perforation, the round billet is successively rolled, rolled or extruded by three rolls. After extrusion, the tube should be sizing. The sizing machine is rotated at a high speed by a conical drill bit into a steel core to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter of the sizing machine drill bit. After the steel pipe has been sized, it enters the cooling tower and is cooled by water spray. After the steel pipe is cooled, it is straightened. After the steel pipe is straightened, it is sent to a metal flaw detector (or water pressure test) by a conveyor belt for internal flaw detection. If there are cracks inside the steel pipe, bubbles and other problems will be detected. After the quality inspection of the steel pipe, it must be carefully selected by hand. After the quality inspection of the steel pipe, the paint is sprayed with the number, specification, production batch number, etc. It is hoisted into the warehouse by a crane.
2. Cold drawn (rolled) seamless steel pipe: round tube billet → heating → perforation → head → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → blank tube → heat treatment → straightening →Hydraulic pressure test (inspection)→marking→into the warehouse.
The rolling method of cold drawn (rolled) seamless steel pipe is more complicated than hot rolling (extrusion seamless steel pipe). The first three steps of their production process are basically the same. The difference begins with the fourth step. After the round billet is hollowed out, it is required to start and anneal. After annealing, it is acid washed with a special acidic liquid. After pickling, apply oil. This is followed by a multi-pass cold drawing (cold rolling) of the blank tube, followed by a special heat treatment. After heat treatment, it is straightened.
erw steel pipe process - Stainless Steel Pipe and Tube
Stainless steel welded pipe production process:
Raw materials – slitting – welding pipe – trimming – polishing – inspection (printing) – packaging – shipping (into the warehouse) (decorative welded pipe).
Raw materials–striping–welding pipe–heat treatment–correction–straightening–trimming–pickling–hydraulic pressure test–inspection (printing)-packaging–shipping (warehouse) (Pipe pipe industrial piping pipe).

Material Grade:

Austenitic Nearest equivalent standard Typical Chemical composition*
ASME AISI UNS EN JIS Cmax Cr Ni Mo Cu Others
Austenitic Stainless Steel Tube
Corrosion Resistant
TP 304 S30400 1.4301 SUS 304 0.080 18.0 8.0      
TP 304 L S30403 1.4307 SUS 304L 0.035 18.0 8.0      
TP 304H S30403 1.4948 SUS 304H 0.04-0.1 18.0 8.0      
TP 321 S32100 1.4541 SUS 321 0.080 17.0 9.0     5(C+N)<Ti< 0.7
TP 321H S32100 1.4878 SUS 321 0.04-0.1 17.0 9.0     4(C+N)<Ti< 0.7
TP 347 S3470 1.4550 SUS 347 0.080 17.0 9.0     10×C<Nb<1
TP 347H S34709   SUS 347 0.04-0.1 17.0 9.0     8×C<Nb<1.10
TP 316 S31600 1.4401 SUS 316 0.060 16.0 11.0 2.0    
TP 316L S31603 1.4404 SUS 316L 0.030 16.0 10.0 2.0    
TP 316H S31609 SUS 316H 0.04-0.1 16.0 11.0 2.0    
TP 316 Ti S31635 1.4571 SUS 316Ti 0.030 16.0 10.0 2.0   N0.015(C+N)<Ti< 0.7
TP 317 S31700 1.4438 SUS 317L 0.080 18.0 11.0 3.0    
TP 317L 31703 1.4438 SUS 317L 0.030 18.0 11.0 3.0    
TP 310 S31000 1.4841 SUS 310 0.080 24.0 19.0      
TP 310S S31008 1.4845 SUS 310S 0.10 24.0 19.0      
TP 310H S31009 1.4845 SUS 310H 0.080 24.0 19.0      
TP 904L N08904> 1.4539 SUS 904L 0.020 19.0> 23.0 4.0 1.0-2.0  

High Temperature Stainless Steel/Heat Resistant Stainless Steel
TP 304H S30403 1.4948 SUS 304H 0.04-0.1 18.0 8.0  
TP 321H S32100 1.4878 SUS 321 0.04-0.1 17.0 9.0 4(C+N)<Ti< 0.7
TP 347H S34709   SUS 347 0.04-0.1 17.0 9.0 8×C<Nb<1.10
TP 309S S30908 1.4833 SUS 310S 0.080 22.0 12.0
TP 310S S31008 1.4845 SUS 310S 0.080 24.0 19.0
TP 310H S31009 1.4845 SUS 310H 0.080 24.0 19.0  

*All figures in weight percentage. In case of order, the limits of the order specification will apply.

Duplex Austenitic Ferritic

  Nearest equivalent standard Typical Chemical composition*
Designation UNS EN JIS Cmax Cr Ni Mo Cu Others
Austenitic Ferritic SteelDuplex Stainless Steel
2101 S32101 1.4162 DP2 0.040 21.0 1.35 0.10 0.10 N 0.20
2205 S32205 1.4462 DP2 0.030 22.0 4.50 3.0 N 0.14
S31803 S31803 1.4462 DP2 0.030 21.0 4.50 2.5 N 0.08
2304 S32304 1.4362 DP2 0.030 21.5 3.0 <0.05-0.6 0.60 N 0.2
2507 S32750 1.4410 DP2 0.030 24.0 6.0> 3.0 0.50 N 0.32
S32760 1.4501 DP2 0.030 24.0 6.0 3.0 0.50 N 0.20

Tubes and Pipes Standards

ASTM- Standard Section One: Iron and Steel Products Steel Piping, Steel Tubing, Fittings 

ASTM A1016-04a Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
ASTM A999-01 Standard Specification for General Requirements for Alloy and Stainless Steel Pipe

A 213 / A 213M-09 Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
A 268 / A 268M Seamless and welded ferritic and martensitic stainless steel tubing for general service
A 269 / A 269M Seamless and welded austenitic stainless steel tubing for general service
A 312 / A 312M-09 Seamless and welded austenitic stainless steel pipes
A 450 / A 450M-03 Standard Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes
A 511 Seamless stainless steel mechanical tubing
ASTM A688 /A688M Welded Austenitic Stainless Steel Feedwater Heater Tubes
A 789 / A 789M Seamless and welded ferritic-austenitic stainless steel tubing for general service
A 790 / A 790M-08 Seamless and welded ferritic-austenitic stainless steel pipe
U Bend Tubes Standards for U bend Stainless Steel Tubes for Heat Exchanger
ASTM E213-09 Standard Practice for Ultrasonic Testing of Metal Pipe and Tubing Ultrasonic Testing
NACE MR0175 Petroleum and natural gas industries – Materials for use in H2S-containing environments in oil and gas production
*Note: 
1. Nickel Alloys standard: ASTM B161, ASTM B163, ASTM B165, ASTM B167, ASTM B338, ASTM B407, ASTM B423,ASTM B444, ASTM B619, ASTM B622, ASTM B626, ASTM B668, ASTM B677, ASTM B829
2. Section Two: Nonferrous Metals Nickel, Cobalt, Lead, Tin, Zinc, Cadmium, Precious, Reactive, Refractory Metals and Alloys; Materials for Thermostats, Electrical Heating and Resistance Contacts, and Connectors
ASMEStandards
ASME Boiler Pressure Code Section II Part A – Ferrous Material Specification
SA 213 / SA 213M Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
SA 268 / SA 268M Seamless and welded ferritic and martensitic stainless steel tubing for general service
SA 269 / SA 269M Seamless and welded austenitic stainless steel tubing for general service
SA 312 / SA 312M Seamless and welded austenitic stainless steel pipes
SA 511 Seamless stainless steel mechanical tubing
SA 789 / SA 789M Seamless and welded ferritic-austenitic stainless steel tubing for general service
SA 790 / SA 790M Seamless and welded ferritic-austenitic stainless steel pipe

UNI-Standards
Stainless and heat resisting steels

UNI 6904 Seamless tubes of special alloyed corrosion and heat resisting stainless tubes

GOST-Standards 
Stainless steels

GOST 9940 Seamless stainless steel tubes, hot finished
GOST 9941 Seamless stainless steel tubes, cold and hot finished
TU 14-3-460 Seamless Steel Pipes for Steam Boilers and Pipelines

European-Standards 
Stainless steel

EN 10216-5* Seamless steel tubes for pressure purposes
EN ISO 1127 Seamless stainless steel tubes (Dimensions and weights)

*Note: This European standard is replacing old national standards for pressure purpose (DIN 17458 DIN 17459 NFA 49117 NFA 49217 NFA 49218 BS 3605 BS 3605-1 etc… 
All European standards have their own national designation (example NF EN 10216-5 DIN EN 10216-5 BS EN XXXXX UNI EN XXXXX ..) 
DIN-Standards

Stainless Steel

DIN 17456 General purpose seamless circular stainless steel tubes
DIN 17458 Seamless circular Austenitic stainless steel tube subject to special requirement
DIN 17459 Seamless Circular High Temperature Austenitic Stainless Steel Tube Subject To Special Requirement

JISStandards
Stainless Steel

JIS G 3459 Stainless steel pipes
JIS G 3463 Stainless steel boiler and heat exchanger tubes

Pipe Working Pressure Calculation

Equation: P = (2*S*T)/((O.D.-2*T)*SF)
 
Where: P = Fluid Pressure (psi)

 

T = Pipe Wall Thickness (in)
O.D. = Pipe Outside Diameter (in)
SF = Safety factor (General Calculations 1.5 – 10, Use 1 For Bursting Pressure)
S =  Material Strength (psi)
Ultimate Tensile strength or Yield strength can be used.
Ultimate should be used to determine the bursting pressure.
Yield can be used for estimating pressures at which permanent deformation begins. 
1Mpa=144.55psi 

According to ASTM A1016,
Hydrostatic test pressure determined by the following equation:
Inch-Pound Units: P=32000t/D 
SI Units: P=220.6t/D
where:
P = hydrostatic test pressure, psi or MPa,
t = specified wall thickness, in. or mm, and
D = specified outside diameter, in. or mm.

NPS – Nominal Pipe Size | Nominal Pipe Scheduel
Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressure and temperature. Pipe size is specified with two non-dimensional numbers: a nominal pipe size (NPS) based on inches, and a schedule (Sched. or Sch.). NPS is often incorrectly called National Pipe Size, due to confusion with national pipe thread (NPT). The European designation equivalent to NPS is DN (diamètre nominal/nominal diameter), in which sizes are measured in millimetres.The term NB (nominal bore) is also frequently used interchangeably with NPS. According to ASME B36.10 and ASME B 36.19.

NPS ⅛ to NPS 3½

NPS DN
mm
OD
inches (millimeters)
Wall Thickness
inches (millimeters)
SCH 5 SCH 10 SCH 30 SCH 40/STD SCH 80 SCH 120 SCH 160 XXS
6 0.405 in (10.29 mm) 0.035 in (0.889 mm) 0.049 in (1.245 mm) 0.057 in (1.448 mm) 0.068 in (1.727 mm) 0.095 in (2.413 mm)
¼ 8 0.540 in (13.72 mm) 0.049 in (1.245 mm) 0.065 in (1.651 mm) 0.073 in (1.854 mm) 0.088 in (2.235 mm) 0.119 in (3.023 mm)
10 0.675 in (17.15 mm) 0.049 in (1.245 mm) 0.065 in (1.651 mm) 0.073 in (1.854 mm) 0.091 in (2.311 mm) 0.126 in (3.200 mm)
½ 15 0.840 in (21.34 mm) 0.065 in (1.651 mm) 0.083 in (2.108 mm) 0.109 in (2.769 mm) 0.147 in (3.734 mm) 0.294 in (7.468 mm)
¾ 20 1.050 in (26.67 mm) 0.065 in (1.651 mm) 0.083 in (2.108 mm) 0.113 in (2.870 mm) 0.154 in (3.912 mm) 0.308 in (7.823 mm)
1 25 1.315 in (33.40 mm) 0.065 in (1.651 mm) 0.109 in (2.769 mm) 0.133 in (3.378 mm) 0.179 in (4.547 mm) 0.358 in (9.093 mm)
32 1.660 in (42.16 mm) 0.065 in (1.651 mm) 0.109 in (2.769 mm) 0.117 in (2.972 mm) 0.140 in (3.556 mm) 0.191 in (4.851 mm) 0.382 in (9.703 mm)
40 1.900 in (48.26 mm) 0.065 in (1.651 mm) 0.109 in (2.769 mm) 0.125 in (3.175 mm) 0.145 in (3.683 mm) 0.200 in (5.080 mm) 0.400 in (10.160 mm)
2 50 2.375 in (60.33 mm) 0.065 in (1.651 mm) 0.109 in (2.769 mm) 0.125 in (3.175 mm) 0.154 in (3.912 mm) 0.218 in (5.537 mm) 0.250 in (6.350 mm) 0.436 in (11.074 mm)
65 2.875 in (73.02 mm) 0.083 in (2.108 mm) 0.120 in (3.048 mm) 0.188 in (4.775 mm) 0.203 in (5.156 mm) 0.276 in (7.010 mm) 0.300 in (7.620 mm) 0.344 in (8.738 mm) 0.552 in (14.021 mm)
3 80 3.500 in (88.90 mm) 0.083 in (2.108 mm) 0.120 in (3.048 mm) 0.188 in (4.775 mm) 0.216 in (5.486 mm) 0.300 in (7.620 mm) 0.350 in (8.890 mm) 0.438 in (11.125 mm) 0.600 in (15.240 mm)
90 4.000 in (101.60 mm) 0.083 in (2.108 mm) 0.120 in (3.048 mm) 0.188 in (4.775 mm) 0.226 in (5.740 mm) 0.318 in (8.077 mm) 0.636 in (16.154 mm)

NPS 4 to NPS 9

NPS DN
mm
OD
inches (millimeters)
Wall thickness
inches (millimeters)
SCH 5 SCH 10 SCH 20 SCH 30 SCH 40/STD SCH 60 SCH 80 SCH 100 SCH 120 SCH 140 SCH 160
4 100 4.500 in (114.30 mm) 0.083 in (2.108 mm) 0.120 in (3.048 mm) 0.188 in (4.775 mm) 0.237 in (6.020 mm) 0.281 in (7.137 mm) 0.337 in (8.560 mm) 0.437 in (11.100 mm) 0.531 in (13.487 mm)
115 5.000 in (127.00 mm) 0.247 in (6.274 mm) 0.355 in (9.017 mm)
5 125 5.563 in (141.30 mm) 0.109 in (2.769 mm) 0.134 in (3.404 mm) 0.258 in (6.553 mm) 0.375 in (9.525 mm) 0.500 in (12.700 mm) 0.625 in (15.875 mm)
6 150 6.625 in (168.27 mm) 0.109 in (2.769 mm) 0.134 in (3.404 mm) 0.280 in (7.112 mm) 0.432 in (10.973 mm) 0.562 in (14.275 mm) 0.719 in (18.263 mm)
8 200 8.625 in (219.08 mm) 0.109 in (2.769 mm) 0.148 in (3.759 mm) 0.250 in (6.350 mm) 0.277 in (7.036 mm) 0.322 in (8.179 mm) 0.406 in (10.312 mm) 0.500 in (12.700 mm) 0.593 in (15.062 mm) 0.718 in (18.237 mm) 0.812 in (20.625 mm) 0.906 in (23.012 mm)

NPS 10 to NPS 24

NPS DN
mm
OD
inches (millimeters)
Wall Thickness
inches (millimeters)
SCH 5s SCH 5 SCH 10s SCH 10 SCH 20 SCH 30
10 250 10.75 in (273.05 mm) 0.134 in (3.404 mm) 0.134 in (3.404 mm) 0.165 in (4.191 mm) 0.165 in (4.191 mm) 0.250 in (6.350 mm) 0.307 in (7.798 mm)
12 300 12.75 in (323.85 mm) 0.156 in (3.962 mm) 0.165 in (4.191 mm) 0.180 in (4.572 mm) 0.180 in (4.572 mm) 0.250 in (6.350 mm) 0.330 in (8.382 mm)
14 350 14.00 in (355.60 mm) 0.156 in (3.962 mm) 0.156 in (3.962 mm) 0.188 in (4.775 mm) 0.250 in (6.350 mm) 0.312 in (7.925 mm) 0.375 in (9.525 mm)
16 400 16.00 in (406.40 mm) 0.165 in (4.191 mm) 0.165 in (4.191 mm) 0.188 in (4.775 mm) 0.250 in (6.350 mm) 0.312 in (7.925 mm) 0.375 in (9.525 mm)
18 450 18.00 in (457.20 mm) 0.165 in (4.191 mm) 0.165 in (4.191 mm) 0.188 in (4.775 mm) 0.250 in (6.350 mm) 0.312 in (7.925 mm) 0.437 in (11.100 mm)
20 500 20.00 in (508.00 mm) 0.188 in (4.775 mm) 0.188 in (4.775 mm) 0.218 in (5.537 mm) 0.250 in (6.350 mm) 0.375 in (9.525 mm) 0.500 in (12.700 mm)
24 600 24.00 in (609.60 mm) 0.218 in (5.537 mm) 0.218 in (5.537 mm) 0.250 in (6.350 mm) 0.250 in (6.350 mm) 0.375 in (9.525 mm) 0.562 in (14.275 mm)

NPS Wall thickness
inches (millimeters)
SCH 40s SCH 40 SCH 60 SCH 80s SCH 80 SCH 100 SCH 120 SCH 140 SCH 160
10 0.365 in (9.271 mm) 0.365 in (9.271 mm) 0.500 in (12.700 mm) 0.500 in (12.700 mm) 0.593 in (15.062 mm) 0.718 in (18.237 mm) 0.843 in (21.412 mm) 1.000 in (25.400 mm) 1.125 in (28.575 mm)
12 0.375 in (9.525 mm) 0.406 in (10.312 mm) 0.500 in (12.700 mm) 0.500 in (12.700 mm) 0.687 in (17.450 mm) 0.843 in (21.412 mm) 1.000 in (25.400 mm) 1.125 in (28.575 mm) 1.312 in (33.325 mm)
14 0.375 in (9.525 mm) 0.437 in (11.100 mm) 0.593 in (15.062 mm) 0.500 in (12.700 mm) 0.750 in (19.050 mm) 0.937 in (23.800 mm) 1.093 in (27.762 mm) 1.250 in (31.750 mm) 1.406 in (35.712 mm)
16 0.375 in (9.525 mm) 0.500 in (12.700 mm) 0.656 in (16.662 mm) 0.500 in (12.700 mm) 0.843 in (21.412 mm) 1.031 in (26.187 mm) 1.218 in (30.937 mm) 1.437 in (36.500 mm) 1.593 in (40.462 mm)
18 0.375 in (9.525 mm) 0.562 in (14.275 mm) 0.750 in (19.050 mm) 0.500 in (12.700 mm) 0.937 in (23.800 mm) 1.156 in (29.362 mm) 1.375 in (34.925 mm) 1.562 in (39.675 mm) 1.781 in (45.237 mm)
20 0.375 in (9.525 mm) 0.593 in (15.062 mm) 0.812 in (20.625 mm) 0.500 in (12.700 mm) 1.031 in (26.187 mm) 1.280 in (32.512 mm) 1.500 in (38.100 mm) 1.750 in (44.450 mm) 1.968 in (49.987 mm)
24 0.375 in (9.525 mm) 0.687 in (17.450 mm) 0.968 in (24.587 mm) 0.500 in (12.700 mm) 1.218 in (30.937 mm) 1.531 in (38.887 mm) 1.812 in (46.025 mm) 2.062 in (52.375 mm) 2.343 in (59.512 mm)
DN – Diameter Nominal

The size of pipes, fittings, flanges and valves are often given in inches as NPS – Nominal Pipe Size, or in metric units as DN – ‘Diametre Nominal’. Pipe is a ubiquitous product in the construction industry. It is made of a wide variety of materials – galvanized steel, black steel, copper, cast iron, concrete, and various plastics such as ABS, PVC, CPVC, polyethylene and polybutylene, among others.

Pipes are identified by “nominal” or “trade” names that are loosely related to the actual dimensions. For instance, a 2-inch galvanized steel pipe has an inside diameter of about 2 1/8 inches and an outside diameter of about 2 5/8 inches. According to ASME B36.10 and ASME B 36.19.

It is common to identify pipes by inches using NPS or ” Nominal Pipe Size “. The metric equivalent is called DN or “diametre nominel”. The metric designations conform to International Standards Organization ISO usage and apply to all plumbing, natural gas, heating oil, and miscellaneous piping used in buildings. The use of NPS does not conform to American Standard pipe designations where the term NPS means “National Pipe Thread Straight”.

Diameter Nominal
DN
(mm)
Nominal Pipe Size
NPS
(inches)
6
1/8
8
1/4
10
3/8
15
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
65
2 1/2
80
3
100
4
150
6
200
8
250
10
300
12
350
14
400
16
450
18
500
20
550
22
600
24
650
26
700
28
750
30
800
32
900
36
1000
40
1050
42
1100
44
1200
48
1300
52
1400
56
1500
60
1600
64
1700
68
1800
72
1900
76
2000
80
2200
88

Nominal Pipe Schdules

Nominal Pipe Size
O.D. Inches

Wall Thickness

5s
5
10s
10
20
30
40s & Std
40
60
80s & E.H.
80
100
120
140
160
Dbl. E.H.
1/8 .405   .035  .049  .049    .068  .068   .095  .095   
1/4 .540   .049  .065  .065    .088  .088    .119  .119   
3/8 .675   .049  .065  .065    .091  .091    .126  .126   
1/2 .840 .065  .065  .083  .083    .109  .109    .147  .147    .187  .294 
3/4 1.050 .065  .065  .083  .083    .113  .113    .154  .154    .218  .308 
1 1.315 .065  .065  .109  .109    .133  .133    .179  .179    .250  .358 
1 1/4 1.660 .065  .065  .109  .109    .140  .140    .191  .191    .250  .382 
1 1/2 1.900 .065  .065  .109  .109    .145  .145    .200  .200    .281  .400 
2 2.375 .065  .065  .109  .109    .154  .154    .218  .218    .343  .436 
2 1/2 2.875 .083  .083  .120  .120    .203  .203    .276  .276    .375  .552 
3 3.500 .083  .083  .120  .120    .216  .216    .300  .300    .437  .600 
3 1/2 4.000 .083  .083  .120  .120    .226  .226    .318  .318    .636 
4 4.500 .083  .083  .120  .120    .237  .237  .281  .337  .337    .437    .531  .674 
4 1/2 5.000   .247    .355    .710 
5 5.563 .109  .109  .134  .134    .258  .258    .375  .375    .500    .625  .750 
6 6.625 .109  .109  .134  .134    .280  .280    .432  .432    .562    .718  .864 
7 7.625   .301    .500    .875 
8 8.625 .109  .109  .148  .148  .250  .277  .322  .322  .406  .500  .500  .593  .718  .812  .906  .875 
9 9.625   .342    .500   
10 10.750 .134  .134  .165  .165  .250  .307  .365  .365  .500  .500  .593  .718  .843  1.000  1.125   
11 11.750   .375    .500   
12 12.750 .156  .165  .180  .180  .250  .330  .375  .406  .562  .500  .687  .843  1.000  1.125  1.312   
14 14.000 .156    .188  .250  .312  .375  .375  .437  .593  .500  .750  .937  1.093  1.250  1.406   
16 16.000 .165    .188  .250  .312  .375  .375  .500  .656  .500  .843  1.031  1.218  1.437  1.593   
18 18.000 .165    .188  .250  .312  .437  .375  .562  .750  .500  .937  1.156  1.375  1.562  1.781   
20 20.000 .188    .218  .250  .375  .500  .375  .593  .812  .500  1.031  1.280  1.500  1.750  1.968   
24 24.000 .218    .250  .250  .375  .562  .375  .687  .968  .500  1.218  1.531  1.812  2.062  2.343   
26 26.000   .312  .500    .375    .500   
28 28.000   312  .500  .625  .375   
30 30.000 .250    .312  .312  .500  .625  .375    .500   
32 32.000   .312  .500  .625  .375  .688    .500   
34 34.00   .312  .500  .625  .375  .688   
36 36.000   .312    .625  .375  .750    .500   

ANSI Standard Steel Pipe Chart ASME B36.10 ASME B36.19

According to ASME B36.10 and ASME B 36.19.

NPS OD Schedule Designations Wall Thickness Inside Diameter Weight
(Inches) (ANSI/ASME)  (Inches)  (Inches) (lbs./ft.) 
 1/8 0.405 10/10S 0.049 0.307 0.1863
Std./40/40S 0.068 0.269 0.2447
XS/80/80S 0.095 0.215 0.3145
 1/4 0.54 10/10S 0.065 0.41 0.3297
Std./40/40S 0.088 0.364 0.4248
XS/80/80S 0.119 0.302 0.5351
 3/8 0.675 10/10S 0.065 0.545 0.4235
Std./40/40S 0.091 0.493 0.5676
XS/80/80S 0.126 0.423 0.7388
 1/2 0.84 5/5S 0.065 0.71 0.5383
10/10S 0.083 0.674 0.671
Std./40/40S 0.119 0.622 0.851
XS/80/80S 0.147 0.546 1.088
160 0.188 0.466 1.309
XX 0.294 0.252 1.714
 3/4 1.05 5/5S 0.065 0.92 0.6838
10/10S 0.083 0.884 0.8572
Std./40/40S 0.113 0.824 1.131
XS/80/80S 0.154 0.742 1.474
160 0.219 0.618 1.944
XX 0.308 0.434 2.441
1 1.315 5/5S 0.065 1.185 0.8678
10/10S 0.109 1.097 1.404
Std./40/40S 0.133 1.049 1.679
XS/80/80S 0.179 0.957 2.172
160 0.25 0.815 2.844
XX 0.358 0.599 3.659
1 1/4 1.66 5/5S 0.065 1.53 1.107
10/10S 0.109 1.442 1.806
Std./40/40S 0.14 1.38 2.273
XS/80/80S 0.191 1.278 2.997
160 0.25 1.16 3.765
XX 0.382 0.896 5.214
1 1/2 1.9 5/5S 0.065 1.77 1.274
10/10S 0.109 1.682 2.085
Std./40/40S 0.145 1.61 2.718
XS/80/80S 0.2 1.5 3.631
160 0.281 1.338 4.859
XX 0.4 1.1 6.408
2 2.375 5/5S 0.065 2.245 1.604
10/10S 0.109 2.157 2.638
Std./40/40S 0.154 2.067 3.653
XS/80/80S 0.218 1.939 5.022
160 0.344 1.689 7.462
XX 0.436 1.503 9.029
2 1/2 2.875 5/5S 0.083 2.709 2.475
10/10S 0.12 2.635 3.531
Std./40/40S 0.203 2.469 5.793
XS/80/80S 0.276 2.323 7.661
160 0.375 2.125 10.01
XX 0.552 1.771 13.69
3 3.5 5/5S 0.083 3.334 3.029
10/10S 0.12 3.26 4.332
Std./40/40S 0.216 3.068 7.576
XS/80/80S 0.3 2.9 10.25
160 0.438 2.624 14.32
XX 0.6 2.3 18.58
3 1/2 4 5/5S 0.083 3.834 3.472
10/10S 0.12 3.76 4.973
Std./40/40S 0.226 3.548 9.109
XS/80/80S 0.318 3.364 12.5
XX 0.636 2.728 22.85
4 4.5 5/5S 0.083 4.334 3.915
10/10S 0.12 4.26 5.613
Std./40/40S 0.237 4.026 10.79
XS/80/80S 0.337 3.826 14.98
120 0.438 3.624 19
160 0.531 3.438 22.51
XX 0.674 3.152 27.54
4 1/2 5 Std./40/40S 0.247 4.506 12.53
XS/80/80S 0.355 4.29 17.61
XX 0.71 3.58 32.43
5 5.563 5/5S 0.109 5.345 6.349
10/10S 0.134 5.295 7.77
Std./40/40S 0.258 5.047 14.62
XS/80/80S 0.375 4.813 20.78
120 0.5 4.563 27.04
160 0.625 4.313 32.96
XX 0.75 4.063 38.55
6 6.625 5/5S 0.109 6.407 7.585
10/10S 0.134 6.357 9.289
Std./40/40S 0.28 6.065 18.97
XS/80/80S 0.432 5.761 28.57
120 0.562 5.491 36.39
160 0.719 5.189 45.35
XX 0.864 4.897 53.16
7 7.625 Std./40/40S 0.301 7.023 23.57
XS/80/80S 0.5 6.625 38.05
XX 0.875 5.875 63.08
8 8.625 5S 0.109 8.407 9.914
10/10S 0.148 8.329 13.4
20 0.25 8.125 22.36
30 0.277 8.071 24.7
Std./40/40S 0.322 7.981 28.55
60 0.406 7.813 35.64
XS/80/80S 0.5 7.625 43.39
100 0.594 7.439 50.95
120 0.719 7.189 60.71
140 0.812 7.001 67.76
XX 0.875 6.875 72.42
160 0.906 6.813 74.69
9 9.625 Std./40/40S 0.342 8.941 33.9
XS/80/80S 0.5 8.625 48.72
XX 0.875 7.875 81.77
10 10.75 5S 0.134 10.482 15.19
10S 0.165 10.42 18.7
20 0.25 10.25 28.04
30 0.307 10.136 34.24
Std./40/40S 0.365 10.02 40.48
XS/60/80S 0.5 9.75 54.74
80 0.594 9.564 64.43
100 0.719 9.314 77.03
120 0.844 9.064 89.29
140 1 8.75 104.13
160 1.125 8.5 115.64
11 11.75 Std./40/40S 0.375 11 45.55
XS/80/80S 0.5 10.75 60.07
XX 0.875 10 101.63
12 12.75 5S 0.165 12.42 22.18
10S 0.18 12.39 24.2
20 0.25 12.25 33.38
30 0.33 12.09 43.77
Std./40S 0.375 12 49.56
40 0.406 11.938 53.53
XS/80S 0.5 11.75 65.42
12 12.75 60 0.562 11.626 73.15
80 0.688 11.376 88.63
100 0.844 11.064 107.32
120 1 10.75 125.49
140 1.125 10.5 139.67
160 1.312 10.126 160.27
14 14 10S 0.188 13.624 27.73
10 0.25 13.5 36.71
20 0.312 13.376 45.61
Std./30/40S 0.375 13.25 54.57
40 0.438 13.124 63.44
XS/80S 0.5 13 72.09
60 0.594 12.814 85.05
80 0.75 12.15 106.13
100 0.938 12.126 130.85
120 1.094 11.814 150.9
140 1.25 11.5 170.21
160 1.406 11.188 189.1
16 16 10S 0.188 15.624 31.75
10 0.25 15.5 42.05
20 0.312 15.376 52.27
Std./30/40S 0.375 15.25 62.58
XS/40/80S 0.5 15 82.77
60 0.656 14.688 107.5
80 0.844 14.314 136.61
100 1.031 13.938 164.82
120 1.219 13.564 192.43
140 1.438 13.124 223.64
160 1.594 12.814 245.25
18 18 10S 0.188 17.624 35.76
10 0.25 17.5 47.39
20 0.312 17.376 58.94
Std./40S 0.375 17.25 70.59
30 0.438 17.124 82.15
XS/80S 0.5 17 93.45
40 0.562 16.876 104.67
60 0.75 16.5 138.17
80 0.938 16.126 170.92
100 1.156 15.688 207.96
120 1.375 15.25 244.14
140 1.562 14.876 274.22
160 1.781 14.438 308.5
20 20 10 0.25 19.5 52.73
20 0.375 19.25 78.6
30 0.5 19 104.13
40 5.94 18.814 123.11
60 8.12 18.376 166.4
80 1.031 17.938 208.87
100 1.281 17.438 256.1
120 1.5 17 296.37
140 1.75 16.5 341.09
160 1.969 16.064 379.17
NPS OD Schedule Designations Wall Thickness Inside Diameter Weight
(Inches) (ANSI/ASME) (Inches) (Inches) (lbs./ft.)
22 22 10/10S 0.25 21.5 58.07
Std./20/40S 0.375 21.25 86.61
XS/30/80S 0.5 21 114.81
60 0.875 20.25 197.41
80 1.125 19.75 250.81
100 1.375 19.25 302.88
120 1.625 18.75 353.61
140 1.875 18.25 403
160 2.125 17.75 451.06
24 24 10/10S 0.25 23.5 63.41
Std./20/40S 0.375 23.25 94.62
XS/80S 0.5 23 125.49
30 0.562 22.876 140.68
40 0.688 22.626 171.29
60 0.969 22.064 238.35
80 1.219 21.564 296.58
100 1.531 20.938 367.39
120 1.812 20.376 429.39
140 2.062 19.876 483.1
160 2.344 19.314 542.13
26 26 10 0.312 25.376 85.6
Std./40S 0.375 25.25 102.63
XS/80S 0.5 25 136.17
28 28 10 0.312 27.376 92.26
Std./40S 0.375 27.25 110.64
20/80S 0.5 27 146.25
30 0.625 26.75 182.73
30 30 10 0.312 29.376 98.93
Std./40S 0.375 29.25 118.65
XS/20/80S 0.5 29 157.53
30 0.625 28.75 196.08
32 32 10 0.312 31.376 105.59
Std. 0.375 31.25 126.66
20 0.5 31 168.21
30 0.625 30.75 109.43
40 0.688 30.624 230.08
34 34 10 0.312 33.376 112.25
Std. 0.375 33.25 134.67
20 0.5 33 178.89
30 0.625 32.75 222.78
40 0.688 32.624 244.77
36 36 10 0.312 35.375 118.92
Std./40S 0.375 35.25 142.68
XS/80S 0.5 35 189.57
42 42 Std./40S 0.375 41.25 166.71
XS/80S 0.5 41 221.61
30 0.625 40.75 276.18
40 0.75 40.5 330.41
48 48 Std./40S 0.375 47.25 190.74
XS/80S 0.5 47

Cold Finished Pipes Tubes Dimension

(WT)mm
(OD)mm
0.6-0.8
0.9-1.2 1.3-1.6 1.7-2.2 2.3-2.9 3-4.5 4.6-5.5 5.6-7.5 7.6-9 9.1-12 12.1-16 16.1-24 24.1-32
5-7
                         
8-10
                         
11-16
                         
17-25
                         
26-35
                         
36-45
                         
6-56
                         
57-65
                         
66-76
                         
77-100
                         
101-114
                         
115-133
                         
134-159
                         
160-219
                         
220-273
                         
274-325
                         

The production scope of us OD: 6mm-830mm, WT:1-45mm. 
We can produce and provide products with the other specifications through negotiation. 
Wenzhou stainless steel industry
Wenzhou’s stainless steel industry is a new industry. It originated in the early 1980s. After 20 years of development and exploration, it has become well-known and influential in the domestic market.
At present, there are more than 130 production enterprises with good development and expansion. There are 38 perforating equipments in the whole industry. There are more than 500 cold rolling and cold drawing equipments and 6 smelting equipments, all of which are refined outside the furnace. Other equipments are relatively complete. The production capacity and scale of enterprises are constantly expanding and enhancing. In 2001, there were 5 enterprises with an output value exceeding 100 million yuan, and more than 10 enterprises were rated as city and district star enterprises. In order to ensure product quality, analytical equipment such as water pressure, eddy current and ultrasonic flaw detection, and direct reading spectrometer are constantly increasing and perfecting. In 2001, it was sampled and tested by the superior technical supervision department, and the pass rate was over 80%. There are more than 300 technical and management personnel with various high- and mid-level titles, and the company is gradually embarking on the track of standardized production and management. Wenzhou stainless steel industry mainly produces stainless steel pipes and stainless steel rods, with more than 400 varieties, specifications and models. In 2001, stainless steel sales reached 1.715 billion yuan and the output reached 106,000 tons. The stainless steel rod is 222 million yuan, the output is 21.1 million tons, and the national tax paid is more than 100 million yuan. The export volume of steel pipes has also increased year by year. In 2001, it was 5000T. It is estimated that the export volume will be 8,000~10000T this year. Ten enterprises have obtained self-support import and export rights. Stainless steel tubes are exported to dozens of countries and regions in Southeast Asia and the European Union, and are highly appreciated by foreign merchants and users.
The stainless steel pipe industry was originally blank in Wenzhou, with rapid development and expanding scale, but there is still a certain gap in production capacity, which still cannot meet the needs of the domestic market. The future development ideas and specific practices of Wenzhou Stainless steel industry are:
1. Focusing on improving product output, strengthening internal management, improving the scale and grade of the company, further improving the visibility of Wenzhou stainless steel pipes and enterprises, encouraging enterprises to develop into groups, and strengthening the introduction and training of technicians and management personnel. Strengthen the construction of production equipment to ensure and improve product quality.
2. Towards the road of brand development, the number of Wenzhou stainless steel industry and entrepreneurs’ credit, shaping Chinese brand awareness.
3. Establish Wenzhou stainless steel pipe production park, gather stainless steel production enterprises, make the above scale, upper grade, create leading, create famous brand, form group production; through mergers, affiliates, shares, joints, etc., realize the Zhejiang Provincial Economic and Trade Department The focus of development is the planning goal.
4. Run the Wenzhou stainless steel professional market. The stainless steel industry is developing rapidly. However, because there is no professional market of a certain scale, it is impossible to recruit tourists from all over the world. Therefore, production enterprises can only set up operations throughout the country, which not only increases the cost of enterprises, but also hinders the development of enterprises. If the professional market is built, the production, sales and service will be integrated into one, which will enable the production enterprises to truly stand on the ground, go to the country and rush out of the country.

Application prospects
Stainless steel pipe is an economical section steel. It is an important product in the steel industry. It can be widely used in living decoration and industry. Many people in the market use it to make stair railings, window guards, railings and furniture. Common materials are 201 and 304.
It accounts for 8% to 16% of the total steel, and its application in the national economy is extremely wide. Because the steel pipe has a hollow section, it is most suitable as a conveying pipe for liquid, gas and solid. At the same time, compared with the same weight of round steel, the steel pipe has large section coefficient and high bending and torsional strength, so it also becomes various mechanical and architectural structures. Important material on it. Structures and components made of stainless steel have a larger cross-sectional modulus than solid parts at equal weight. Therefore, the stainless steel pipe itself is a metal-saving economic section steel, which is an important part of high-efficiency steel, especially in the oil drilling, smelting and transportation industries, followed by geological drilling, chemical industry, construction industry, machinery. A large variety of steel pipes are also required for industrial, aircraft and automobile manufacturing as well as for boilers, medical devices, furniture and bicycle manufacturing. With the development of new technologies such as atomic energy, rockets, missiles and aerospace industries, the role of stainless steel pipes in the defense industry, science and technology and economic construction has become increasingly important.
The stainless steel pipe is safe, reliable, hygienic and environmentally friendly, economical, the thin wall of the pipe and the successful development of a new reliable, simple and convenient connection method, which has more advantages that other pipes are irreplaceable, and the application in engineering will be more and more The use will become more and more popular, and the prospects are promising.
Since stainless steel already has many of the desirable properties required for building materials, it is arguably unique in metals, and its development continues. In order to make stainless steel perform better in traditional applications, existing types have been improved, and new stainless steels are being developed to meet the stringent requirements of advanced architectural applications. Due to continuous improvement in production efficiency and continuous improvement in quality, stainless steel has become one of the most cost-effective materials selected by architects.
Stainless steel combines performance, appearance and use characteristics, so stainless steel will remain one of the best building materials in the world.

With the implementation of China’s reform and opening up policy, the national economy has experienced rapid growth, and urban residential, public buildings and tourist facilities have been extensively built, placing new demands on hot water supply and domestic water supply. In particular, water quality issues are becoming more and more important, and requirements are constantly improving. Galvanized steel pipe, a common pipe due to its corrosiveness, is in the relevant national policy.

Source: China Stainless Steel Pipes Manufacturer – Yaang Pipe Industry Co., Limited (www.ugsteelmill.com)

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

If you want to have more information about the article or you want to share your opinion with us, contact us at sales@ugsteelmill.com

Please notice that you might be interested in the other technical articles we’ve published:

  • Tips for selecting expansion joints

  • What is the difference between a steel pipe and a steel tube

  • Engineering Specification for Pressure Test of Piping System

  • How to choose a valve and valve end connection type

  • How to test pipe fitting

  • Manufacturing process of cold rolled steel pipe

  • Development trend of high pressure pipe fittings

  • How to get high quality flanges

  • How to get high quality pipe fittings

  • How to get high quality bellow expansion joints

  • How to get high quality alloy steel pipes

  • What are Nickel Alloys Pipes

References:

  1. https://www.yaang.com

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