How to get high quality pipe coupling?

What is a pipe coupling?

Pipe coupling connect two pipes or tubes together of equal or differing sizes . Pipe coupling mainly aims to solve the existing couplings easily generated due to fatigue fracture stress concentration problems.
Pipe coupling structure is: pipe ends with the inner wall of the coupling connected to tapered threads, couplings and tubing ends of the body with the same thread pitch flat with threaded connect. A single taper threaded connection with relief tubing outer thread root stress concentration characteristics, not easy to produce fatigue fracture, connecting effect. Effectively prevent oil well pipeline string broken off accidents.

Removable pipe couplings are most often of a threaded design which allows them to be screwed onto the pipes to be joined. The most simple of these is a basic pipe section slightly larger than the pipes to be joined and cut with an internal thread. The ends of the pipes are also threaded, and the coupling is simply sealed with hemp or sealing tape and screwed onto both pipes. More complex removable pipe couplings are of a two-part design where one part is attached to each pipe and then screwed together to complete the joint. These types of couplings are often used on high pressure copper gas pipes and flexible hydraulic or pneumatic hoses.

A cuplaj pentru țevi is also often used to facilitate changes of pipe routing, crossing of obstacles, and penetration of walls. These couplings are typically elbow or U shaped but may include several variants featuring different angles of deflection. Step-down or reduction pipe couplings featuring different end diameters are used to join pipes of dissimilar sizes. Adaptor fitting may also be used to join pipes of different materials and feature separate end fittings suitable for both materials. Where more than two pipes are to be joined Y, T, or cross shaped couplings are common methods of achieving the joints.

Pipe couplings may also include other features such as inspection or maintenance access points. These are typically screw-on caps that allow for visual inspections or the insertion of rods used to remove blockages. Flow meters and other analytical attachments are frequently built into a pipe coupling to ease installation. Pipe couplings may also include mechanisms such as shut-off and pressure release valves.

Tipuri de pipe couplings

Full Coupling fittings

What is a socket weld full coupling?

Half Coupling fittings

What is a socket weld half coupling?

The socket weld half coupling can be directly welded to the run pipe, to make a branch connection. Used to take a small bore pipe branch-off from a large bore pipe where the pipe spec requirement is socket weld in small bore size.

Product: Socket Weld Half Coupling

Size : 1/2″NB TO 4″NB IN

Class : 3000 LBS, 6000 LBS, 9000 LBS

Type : Socket Weld (S/W) & SCREWED (SCRD) – NPT, BSP, BSPT   

Form : 45 Deg Elbow, 90 Deg Elbow, Forged Elbow, Threaded Elbow, Socket Weld Elbow.

MATERIALS : 
Stainless Steel Socket Weld Half Coupling – SS Socket Weld Half Coupling 
ASTM A182 F304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L 

Duplex Stainless Steel Socket Weld Half Coupling – Duplex SS Socket Weld Half Coupling
ASTM / ASME A/SA 182 UNS F 44, F 45, F51, F 53, F 55, F 60, F 61.

Carbon Steel Socket Weld Half Coupling – CS Socket Weld Half Coupling
ASTMA 105/A694/ Gr. F42/46/52/56/60/65/70

Low Temperature Carbon Steel Socket Weld Half Coupling  – LTCS Socket Weld Half Coupling
A350 LF3/A350 LF2

Alloy Steel Socket Weld Half Coupling – AS Socket Weld Half Coupling
ASTM / ASME A/SA 182  F1/F5/F9/F11/F22/F91

Nickel Alloy Socket Weld Half Coupling  :
Standard: ASTM / ASME SB 564 / 160 / 472.
UNS 10276 (HASTELLOY C 276 Forged Elbow )
UNS 2200 (NICKEL 200 Forged Elbow ), 
UNS 2201 (NICKEL 201 Forged Elbow ), 
UNS 4400 (MONEL 400 Forged Elbow ), 
UNS 8020 (ALLOY 20 Forged Elbow )
UNS 8825 INCONEL 825 Forged Elbow ), 
UNS 6600 (INCONEL 600 Forged Elbow ), 
UNS 6601 (INCONEL 601 Forged Elbow), 
UNS 6625 (INCONEL 625 Forged Elbow),

Copper Alloy Socket Weld Half Coupling 
ASTM / ASME SB 61 / 62 / 151 / 152.
C 70600 (CU -NI- 90/10) – Cupro Nickel Forged Elbow 
C 71500 (CU -NI- 70/30) – Copper Nickel Forged Elbow 
UNS NO. C 92200, UNS NO. C 83600, UNS NO.  UNS NO C 10100,
C 10200, C 10300, C 10800, C 12000, C 12200

Dimensions of ASME B 16.11 Socket Weld Half Coupling

NPS 1/2 to 4 – 3000 LBS – ASME B 16.11

NPS	Soclu Alezaj	Adâncime Soclu	Alezaj diameter	Soclu wall thickness	Lungimi de așternere
	B	J	D	C	Cuplaj E
1/2	21.95 21.70	10	16.6 15	4.65 4.10	9.5
3/4	27.30 27.05	13	21.7 20.2	4.90 4.25	9.5
1	34.05 33.80	13	27.4 25.9	5.70 5.00	13
1¼	42.80 42.55	13	35.8 34.3	6.05 5.30	13
1½	48.90 48.65	13	41.7 40.1	6.35 5.55	13
2	61.35 61.10	16	53.5 51.7	6.95 6.05	19
2½	74.20 73.80	16	64.2 61.2	8.75 7.65	19
3	90.15 89.80	16	79.5 46.4	9.50 8.30	19
4	115.80 115.45	19	103.8 100.7	10.70 9.35	19

Dimensions Socket Weld Half couplings – NPS 1/2 to 2 – 6000 LBS – ASME B16.11

NPS	Soclu Alezaj	Adâncime Soclu	Alezaj diameter	Soclu wall thickness	Lungimi de așternere
	B	J	D	C	Cuplaj E
1/2	21.95 21.70	10	12.5 11	5.95 5.20	9.5
3/4	27.30 27.05	13	16.3 14.8	6.95 6.05	9.5
1	34.05 33.80	13	21.5 19.9	7.90 6.95	13
1¼	42.80 42.55	13	30.2 28.7	7.90 6.95	13
1½	48.90 48.65	13	34.7 33.2	8.90 7.80	13
2	61.35 61.10	16	43.6 42.1	10.90 9.50	19

Racordurile de cuplare sunt utilizate pentru conductele de fluide, în care fiecare parte de capăt a două tuburi care urmează să fie conectate este prevăzută cu un adaptor cu racordare, care poartă mijloacele necesare pentru a conecta sau deconecta tuburile fără a deranja adaptorul cu racordare.

Our range of coupling fittings are available in aluminium, steel and bronze.

Pipe couplings are highly demanded in the pipe fitting market. Pipe couplings are fittings that help to extend or terminate pipe runs. These fittings are also used to change pipe size. Couplings extend a run by joining two lengths of pipe. They are known as reduced coupling if they are used to connect pipes of different sizes. Couplings are also known as repair couplings. These couplings are without stops or ridges and they can be fixed anywhere along the pipe length for preventing leak of any kind. 

Material: ASTM A105, F304, F316, F304L, F316L, A182, F11, F22, and F91 
Pressure: 2000LBS, 3000LBS, 6000LBS, 9000LBS 
Size: from 1/4 to 4 inches 
Standard: ANSI B16.9/B16.28 and MSS SP-43/SP-75 
Connection ends: butt welded, threaded 
Thread types: NU, EU, STC, LTC and BTC
Surface treatment:Shot blasted, rust-proof black oil
Packing: Plywood Case/ Pallet/ other

A Hex Coupling is a Pipe fitting which consists of a short piece of Hex pipe, provided with a female pipe thread at both end, for connecting two other fittings.

A Hex Reducing Coupling is a Pipe fitting which consists of a short piece of Hex pipe, provided with a female pipe thread of different sizes at both end, for connecting two other fittings.

Sursa: China Pipe Coupling Producător - Yaang Pipe Industry Co., Limited (www.ugsteelmill.com)

(Yaang Pipe Industry este un producător și furnizor de frunte de produse din aliaj de nichel și oțel inoxidabil, inclusiv flanșe din oțel inoxidabil Super Duplex, flanșe din oțel inoxidabil, fitinguri din oțel inoxidabil, țevi din oțel inoxidabil, țevi din oțel inoxidabil. Produsele Yaang sunt utilizate pe scară largă în construcții navale, energie nucleară, inginerie marină, petrol, chimie, minerit, tratarea apelor uzate, gaze naturale și vase sub presiune și alte industrii).

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Referințe:

• https://www.yaang.com/what-is-a-socket-weld-full-coupling.html
• https://www.yaang.com/what-is-a-socket-weld-half-coupling.html
• https://www.yaang.com/what-is-threaded-half-coupling.html
• https://www.yaang.com/what-is-threaded-reducing-coupling.html
• https://www.yaang.com/what-is-threaded-full-coupling.html