How to make high pressure pipe fittings

What are high-pressure pipe fittings?

High-pressure pipe fittings are a type of plumbing fitting that joins multiple pipes together. Unlike standard plumbing fittings, high-pressure pipe fittings can withstand the pressure of compressed gases or liquids. To manufacture high-pressure pipe fittings, an alloy called stainless steel is used. Stainless steel is commonly used for these types of fittings because of its strength and durability, as well as its antimicrobial properties. To make high-pressure pipe fittings, a metal rod called stock is first heated in a furnace to ensure that it melts. Each fitting needs to be formed individually, so each metal rod is then placed in a machine that forms the pipe fitting. The metal rods are cooled after they are formed into a shape. The same process occurs repeatedly until there are enough of the same type of fitting to fulfill consumer demand.”

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Types of High-pressure Pipe Fittings

Threaded Pipe Fittings:

  • Elbow(90°,45°), Tee;
  • Full coupling, Half coupling;
  • Boss, Reducing coupling, Cap;
  • Hexagon head plug, Hexagon busing;
  • Reducing Hexagon nipple, Hexagon nipple;
  • Hexagonal nut, Nipple;
  • Union, 90° Street elbow.

Socket-weld Fittings:

  • Elbow(90°,45°), Tee;
  • Full coupling, Half coupling;
  • Reducing Coupling, High-pressure boss;
  • Welding boss, (45°) Mitre boss;
  • Reducing Coupling, Cap(Socket-welded End);
  • Union(SW), Socket Reducing Insert, etc.

Branch Fittings:

  • Weldolet, Sockolet;
  • Threadolet, Nicolet;
  • Latrobe, Elbolet;
  • Sweepolet, Flangedolet (Nipoflanged, Weldoflanged) etc.

Connected End of High-pressure Pipe Fittings

  • Threaded and socket-weld are the common types for the connection of the forged fitting.
  • The threaded end has male and female types for connected – Male is for such street elbow, plug, bushing, nipple, etc. Female is for elbow, tee, coupling, etc.
  • We can offer both NPT and BSP threaded – NPT is the default screw if there is no specific.
  • Socket-weld is one pipe end to insert the fittings for welding, SW end is for all the fittings except threaded.

Standard of High-pressure Pipe Fittings

  • ANSI B16.11
  • BS3799
  • JIS B2302
  • MSS SP-83
  • MSS SP-79
  • MSS SP-97
  • GB14626
  • GB/T14383

Materials of High-pressure Pipe Fittings

High-pressure pipe fittings are manufactured from a variety of raw materials. Here is a list of some of the most common:

Stainless Steel
ASTM A403 304/L, 304H 310S, 310H 316/L, 316Ti, 316H 317/L 321/H 347/H S31803 S32750 904L 254SMO (S31254)
Duplex & Super Duplex Stainless Steel
ASTM A815 UNS S31803, S32205, UNS S32750, S32760
Nickel-base Alloy Steel
Alloy 200, Monel 400, K500, Inconel 600, 625, Incoloy 800, 800H, 800HT, 825, alloy 20, alloy28, hastelloy C22, C276 etc.
Copper-Nickle Alloy Steel
Cu70Ni30(C71500, B30), Cu90Ni10(C70600,B10)
Titanium Alloy
Gr. 1, Gr.2, Gr.11, etc.
Carbon Steel
Low-Temperature Steel
Alloy Steel
ASTM A234 WP5, WP9, WP11, WP12, WP22, WP91,WP911,WPR
High Yield Steel
ASTM A860 WPHY42, 46, 50, 52, 56, 60, 65, 70

  • *The listed materials are for reference only, some materials will be on the quantity because we may have no raw material in stock. We are strength to supply stainless steel 304 weld fittings, 316 fittings, duplex S31803 fittings, etc.
  • **DIN/EN equivalent grade is available, but sometimes we will use ASTM/ASME material to replace if the quantity is not considerable or the material is difficult to get. We will mark it in the offer.

Use of High-pressure Pipe Fittings

High-pressure pipe fittings are used in petrochemical industries and various industries for fluid transportation. The pressure is from 0 to 40 MPa to suit different work conditions. They are of different sizes from 1/4 inch to 4 inches depending on applications. We can now provide high-quality products with competitive prices and the best services for you.

Inspection Quality of High-pressure Pipe Fittings

  • Our factories are ISO 9001 and PED 2014/68/EU-approved manufacturers. We believe that quality is the life of the company. To provide quality products is the thing we are doing.
  • PMI test to ensure the material quality
  • Dimension controlling during fabricating and finished
  • 100% Visual and surface examination
  • Tensile test per heat
  • Intergranular Corrosion test on request
  • NDT test of PT, UT, RT
  • Other requirements from Clients

How to make high-pressure pipe fittings?

To make a high-pressure pipe fitting, you need to begin by making the raw material. The raw material is stainless steel. Stainless steel is mined from the earth and refined into stainless steel bars. The stainless steel bars are melted down in large furnaces and then cast into ingots. After being cast, the ingots are extruded into rods which can be drawn through dies to form tubing or wire (which may be coiled). Once drawn, the tubing or wire can be rolled into smaller diameters using rolling mills until it reaches a diameter appropriate for making fittings such as elbows, tees, and crosses.
If the raw material doesn’t meet quality checks, it will be rejected for use.
The raw material must meet quality checks at every step of the production process. If the raw material does not pass these quality checks, it will be rejected for use. After checking for any imperfections and ensuring that the dimensions are within specification, each piece is weighed to ensure that it weighs what it should.
If all checks are passed, then the next step is to inspect each piece again before moving on. Any pieces that have any flaws or imperfections at this stage will be rejected by inspectors who will re-check them as necessary until they can confirm that there are no further problems with them
If the raw material passes quality checks, then it will move on to the next step.
If the raw material passes quality checks, it will move on to the next step. If the raw material does not pass quality checks, it will be rejected and sent back to you.
The good raw material is placed into a die where it is formed into the shape of the pipe fitting using a press.
The die, which is the mold of your pipe fitting, will have been made from a special steel alloy. The steel must be able to withstand high temperatures and pressures during production. It also needs to be tough enough to withstand repeated use without losing its strength or becoming brittle over time. Once you have chosen your die material, you can start work on making an accurate working pattern of your finished product by drawing out all sides of it on paper first before transferring these shapes onto a piece of wood or plasticine (a substance similar to clay). This allows you to get an idea about how big each part needs
to be for them to all fit together nicely when glued together later on in the production line stage.
If the piece has any imperfections, it will be rejected at this point.

  • The piece must be the correct size.
  • The piece must be straight and not bent or misshapen.
  • The piece must be clean and free of rust or other contaminants that could cause damage to the fitting when installed.

Once the piece has been formed, an inspector will check it to see if meets quality standards. This inspection process can be automated at some facilities or done manually at others.
During the inspection, the piece is checked for shape, size, and other characteristics such as dents, scratches, or cracks. If any defects are detected, then the piece must be repaired before it can be used or moved on to another step in the manufacturing process.
If the piece passes inspection, it is sent on to the next step in the process flow where it is cleaned before it is packaged.
The cleaning process removes any residue from the forming process and turns it into a clean product that can be shipped directly to an end customer.
The clean high-pressure pipe fittings are collected and packaged for shipment either as-is or with other fittings and parts to build fluid systems.
Each high-pressure pipe fitting is cleaned, inspected for damage, and packaged for shipment either as-is or with other fittings and parts to build fluid systems. The clean high-pressure pipe fittings are collected in a bin and then placed into a plastic box that can be sealed airtight. After this, the box is shipped to a customer who will use it to make their own fluid system.
High-pressure pipe fittings are made from stainless steel in several steps.
The first step in making high-pressure pipe fittings is to gather the raw materials. Stainless steel, zinc, tin, and nickel are used in the manufacturing of these fittings. The stainless steel is then cut into sheets and rolled flat before being fed through a rolling mill that flattens it even further.
The material is inspected for impurities such as bits of metal flakes or dirt by an inspector who uses a microscope to check for imperfections. If there are no defects, the sheet of stainless steel is sent on to another machine where it goes through several steps:

  • Cleaning – A cleaning solution removes any oils or other contaminants from the surface of the metal
  • Etching – An electrical current creates an acid bath that etches away at exposed areas where dirt may have collected
  • Buffing – This step makes sure that all rough edges have been removed so that they won’t scratch anyone when handled properly (which you should always do).

Process Flow of High-pressure Pipe Fittings

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The process of making high-pressure pipe fittings is an extremely important one. It’s necessary to ensure that the fittings meet quality standards so they can be used in industrial applications and other areas where high pressures are present. The process also requires many steps and careful inspection throughout each phase of production, which helps ensure that each fitting meets these standards as well as ensuring that no defects go unnoticed until it’s too late for them to be corrected before shipping out of our plant.

Packing of High-pressure Pipe Fittings

The fittings are packed in cartons firstly, then in plywood boxes/pallets for sea and air shipment. If you have any specific, please tell us when you order.

How to Order High-pressure Pipe Fittings

When you want to get a quote or release a PO to us, pls clear the information:

  • Fittings type + End type ( NPT/BSP or SW) + Class + Size + Material + Standard + Order Quantity

For example, if you want to buy 100 pcs 90 Elbow 6000# SW 2” for your system in stainless steel 316L, the piping design is to ASME, so the description would be:

  • 90 Elbow, 2” 6000#, A182 F316L, ASME B16.11, 1,000PCS

Please don’t hesitate to contact us if you have any questions.


The manufacturing process of high-pressure pipe fittings is a complex one. However, the end result is worth all the hard work that goes into making these pipes. With proper care and maintenance, they will last for years in any application where water or compressed gases are involved.

Source: China High-pressure Pipe Fittings Manufacturer – Yaang Pipe Industry Co., Limited (

(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.)

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