China Butt Weld Fittings manufacturer


TOBO International Trading(Shanghia)Co.,Ltd       Tianda Oil Pipe Co., Ltd

TOBO Pipeline Equipment Co.,Ltd        TPCO & TISCO Pipe(Tianjin)Co.,Ltd.                        


August 5, 2021

6 '' Forged Flange Long Welding Neck Pipe Flange NO8825 CL150 ASME B16.48 Industrial Flat Face Weld Neck Flange

6 '' Forged Flange Long Welding Neck Pipe Flange NO8825 CL150 ASME B16.48 Industrial Flat Face Weld Neck Flange



 Elbows in long (LR) & short radius (SR) in 45 deg, 90 deg, 180 deg, R=3D, 5D, 6D, 8D, 10D & 20D.
 Reducer: Eccentric & concentric
 Caps & crosses.
 Long & short stub end.

Stainless steel Butt Weld Fittings
Standard: ASTM / ASME A/SA 403 GR WP "S" / "W" / " WX"/ASTM A420
Grade: WP304, ,304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904, 904L, 409, 410, 430, 440C

Nickel Alloy Butt Weld Fittings
Standard: ASTM / ASME SB 336.
Grade: UNS 2200 (NICKEL 200), UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8020 (ALLOY 20 / 20) CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276)

Carbon Steel & Alloy Steel Butt Weld Fittings
Standard: ASTM / ASME A/SA 234 / 860/MSS-P75
Grade: WPB, WPC, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 ,WPHY 70. WPHY 100

Standard: ASTM / ASME A/SA 234
Grade: WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 23, WP 91 & WPL3, WPL6

Copper Alloy & Duplex Steel Butt Weld Fittings
Standard: ASTM / ASME SB 111 / 466/ASTM A403
Grade: UNS NO. C 10100, 10200, 10300, 10800, 12000, 12200, 70600 ( CU -NI- 90/10) , 71500( CU -NI- 70/30).

Standard: ASTM / ASME A/SA 815
Grade: UNS NO S 31803, S 32205, S 32550, S 32750, S 32760.

Minimum Order Quantity: 1pcs
Price: negotiation
Payment Terms: T/T or western Union
Supply Ability: 3,000pcs per month
Delivery Time: 10-100 working days after received your payment
Packaging Details: Petroleum/Power/Chemical/Construction/Gas/Metallurgy/Shipbuilding etc


Buttweld Fittings

We supply a wide range of Buttweld Fittings. Widely used in Oil, Gas, Filtration, Refrigeration, Refining, Petrochemical and Offshore Industries.

Buttweld Fittings are used in a piping system to change a direction or function, which is mechanically joined to the system. Probably the simplest way to achieve this would be to bend the pipe in the direction required, but this process will stretch and thin the outer wall of the pipe whilst thickening and wrinkling the inner wall of the pipe. This results in flow resistance and accelerated wall erosion.

A second method sometimes used is a mitred joint, where steel Buttweld Fittings are cut to the correct angle and welded together to achieve the desired change. Whilst the cross-section area and wall thickness are maintained a great deal of efficiency is lost due to friction and turbulence resulting from the severe change in direction; for example a single-mitred bend offers about six times the resistance of a swept elbow.

flangeType Stainless Steel Flanges ASTM A 182, GR F1, F11, F22, F5, F9, F9 WN SO BL JIN ECT
Standard ASME/ANSI B16.5
Size 1/2’’~60’’
Pressure Rate 150lb to 2500lb
Manufacturing process Push, Press, Forge, Cast, etc.
Material stainless steel
Alloy steel NO8825

Allloy steel flange


ASTM A182 F5; F11;F22;F91;F51

ASTM A350 LF1; LF2; A350 LF3 ;LF4;LF6;LF8

Stainless Steel flange


ASTM A182 F304/304H/304L

ASTM A182 F316/316H/316L

ASTM A182 F321/321H

ASTM A182 F347/347H

Nickel Alloys Flanges


Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276

Copper Alloys Flange


Copper, Brass & Gunmetal
Manufacture Standard ANSI : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
B.S : BS4504 , BS4504, BS1560, BS10
Package Wooden cases, pallets, nylon bags or according to the customers' requirements
MOQ 1pcs
Delivery time 10-100 days depending on quantity
Payment terms T/T or Western Union or LC
Shipment FCA Tianjin/Shanghai, CFR, CIF, etc
Application Petroleum/Power/Chemical/Construction/Gas/Metallurgy/Shipbuilding etc
Remarks Other materials and drawings are available.

Buttweld Elbow Fitting

The Buttweld Elbow Fitting is a pipe fitting installed between two lengths of pipe or tube allowing a change of direction, usually 180°, 90° or 45°. The ends are machined for Butt Welding when the two ends differ in size, it is called a Reducing or Reducer Elbow.

Most elbows are available in short radius or long radius of types. The short radius elbows have a center to end distance equal to the NPS in inches, while the long radius is 1.5 times the NPS in inches.


Buttweld Tee Fitting

Buttweld Tee Fittings are widely used in industrial tubing to merge or divide fluids and do not require special tubing preparation before applications. Available in different threading specifications and various grades Buttweld Tee Fittings are engineered to close tolerances and precise dimensions.


Buttweld Cross Fitting

Buttweld Cross Fittings are used in several industries for providing leak free and torque free sealing in any piping or tubing connection. Offered in various grades Buttweld Cross Fittings are reckoned for their close tolerances and excellent finishes.


Buttweld Cap Fitting

The function of a Buttweld End Cap Fitting is to block off the end of a line in a piping system. The Buttweld Cap is fitted by placing the end cap over the open line and welding around the joint.

Buttweld Stub End Fitting

Stub Ends are installed in pairs and mated together with two Lap Joint Flanges. The surface of the stub end has a phonographic serrated gasket surface which prevents leakage at the joint. Using stub ends allows sections of the line to be opened for cleaning, inspection or quick replacement etc, without the need to re-weld.


Eccentric / Concentric Reducer Fitting

There are two options available, of Concentric Reducer or Eccentric Reducer.

An Eccentric Reducer, also called a Bell reducer, has two female (inside) threads of different sizes with centers so designed that when they are joined, the two pieces of pipe are not in line with each other, but they can be installed so as to provide optimum drainage of the line.

The fitting is designed with the smaller outlet off center to the larger end, allowing it to align with only one side of the inlet. The reducer fittings are designed to be welded with ease and offer superior strength and leak resistance.

Eccentric Reducer must be installed with straight side up to prevent trapping air at the pump suction. They are designed to allow simple connection of different sized pipes. These can be used as pipe reducers, flexible connectors and vibration eliminators.

Eccentric Reducers eliminate noise and isolate vibration in the pipeline, reduces stress, eliminates electrolysis and protects against start-up surges

Nickel Alloy Pipe Flange


Our nickel alloys are adopted for use in tough environments as oil platforms and desalination plants. By us you find nickel alloys with corrosion resistance, good weldability and formability.


With a nickel alloy from us you get a material adopted for use in tough environment. Within our product range you can find corrosion resistance alloys, welding alloys and nickel alloys for electrical resistance and electronic instruments. We also have high temperature alloys. By varying the combination of different chemical elements a wide range of useful properties can be achieved as high corrosion resistance, high rupture strength, toughness, metallurgical stability, good fabricability, creep strength and good fatigue life.

Some common applications for nickel alloys:

  • Desalination plants
  • Pressure vessels
  • Oil platforms
  • Heat exchangers
  • Seawater handling
  • Pulp bleaching


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