Buttweld fittings

Buttweld fittings are critical components used to connect pipes and equipment in a piping system through welding. These fittings provide a strong, permanent, and leak-proof joint, making them ideal for high-pressure, high-temperature, and corrosive environments. Common types of buttweld fittings include elbows, tees, reducers, and caps, each serving a specific function in changing the direction, branching, or reducing the size of the pipe. Manufactured from materials like carbon steel, stainless steel, and alloy steel, these fittings are widely used in oil and gas, petrochemical, power generation, and marine industries.

Buttweld pipe fittings are preferred for their smooth internal surface, which ensures minimum pressure drop and reduces the risk of turbulence in the flow. They are produced according to international standards such as ASME B16.9 and ANSI to ensure dimensional accuracy and compatibility in industrial systems. The welded joint formed between the pipe and fitting ensures structural integrity and allows for long-term performance even in the most demanding applications. With their ability to handle critical service conditions, buttweld fittings are a reliable and cost-effective solution for complex piping networks.



Manufacturing Standards


Specification Description
ASME ANSI B16.9, ANSI B16.28, MSS-SP-43
DIN DIN2605, DIN2615, DIN2616, DIN2617, DIN28011
EN EN10253-1, EN10253-2


Specification Description
ASTM A403 – ASME SA403 Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
ASME B16.9 Factory-Made Wrought Fittings Buttwelding
ASME B16.25 Buttwelding Ends
ASME B16.28 Wrought Steel Short Radius Elbows and Buttwelding Returns
MSS SP-43 Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications


Material Grades


Specification Description
Stainless Steel ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
Carbon Steel ASTM A 234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70
Low Temperature Carbon Steel ASTM A420 WPL3, A420 WPL6
Alloy Steel ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
Duplex Steel ASTM A 815, ASME SA 815 UNS NO S31803, S32205. Werkstoff No. 1.4462
Nickel Alloy ASTM / ASME SB 336 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)


Elbow

An elbow buttweld fitting is a crucial component used to change the direction of piping systems by 45°, 90°, or 180°. These fittings are designed to be welded directly to the pipe ends, providing a strong, leak-proof, and permanent joint. Manufactured from materials like carbon steel, stainless steel, and alloy steel, elbow buttweld fittings are ideal for high-pressure, high-temperature, and corrosive environments. They are widely used in industries such as oil and gas, petrochemical, and power generation to ensure smooth fluid flow and system integrity.


Specification Description
Outside Diameter Seamless Elbow (1/2" – 24"), ERW/Welded/Fabricated Elbow (1/2" – 48")
Wall Thickness 3mm – 40mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Bending Radius R=1D – 10D, 15D, 20D
Product’s Angle 5° – 180° Elbows, 90° and 45° Long Radius Elbows, Long Radius Returns, Short Radius Elbows and Returns
Value Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering
Production Grades Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel


Tee

A tee buttweld fitting is a versatile pipe fitting used to either combine or split fluid flow in piping systems. Designed to be welded directly to pipes, these fittings provide a durable and leak-proof connection, capable of handling high pressure and high temperature applications. Tee buttweld fittings come in equal and reducing types to accommodate different pipe sizes and flow requirements. They are commonly used in industries such as oil and gas, chemical processing, and power plants to ensure efficient and reliable distribution of fluids.


Specification Description
Outside Diameter Seamless Pipe Tee (1/2″–24″), ERW / Welded / Fabricated Pipe Tee (1/2″–48″)
Types Equal Tees, Reducing Tees
Wall Thickness 3mm – 40mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Value Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering
Production Grades Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel

Cross

A cross buttweld fitting is a four-way pipe fitting that allows for the branching of fluid flow in multiple directions. Designed to be welded directly onto pipes, this fitting ensures a strong and leak-proof connection suitable for high-pressure and high-temperature applications. Cross buttweld fittings are commonly used in complex piping systems in industries such as chemical processing, oil and gas, and power generation, providing efficient fluid distribution and system reliability.


Specification Description
Outside Diameter Seamless Pipe Tee (1/2″–24″), ERW / Welded / Fabricated Pipe Tee (1/2″–48″)
Types Seamless, Welded, Equal Cross, Reducing Cross
Wall Thickness 3mm – 40mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Value Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering
Production Grades Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel

Reducer

A reducer buttweld fitting is used to connect pipes of different diameters, allowing for a smooth transition and efficient flow within the piping system. These fittings are designed to be welded directly to the pipes, providing a strong, leak-proof joint suitable for high-pressure and high-temperature applications. Reducer buttweld fittings come in two types: concentric and eccentric, each serving specific purposes in industries such as oil and gas, chemical processing, and power generation, where maintaining flow integrity is critical.


Specification Description
Outside Diameter Seamless Pipe Tee (1/2″–24″), ERW / Welded / Fabricated Pipe Tee (1/2″–48″)
Types Concentric Reducers, Eccentric Reducers
Wall Thickness 3mm – 40mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Value Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering
Production Grades Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel

End Cap

An end cap buttweld fitting is used to close the end of a pipe, providing a secure and leak-proof seal in piping systems. Designed to be welded directly onto the pipe end, these fittings ensure structural integrity and prevent the flow of fluids or gases beyond a certain point. End caps are commonly manufactured from materials like carbon steel, stainless steel, and alloy steel, making them suitable for use in high-pressure and corrosive environments found in industries such as oil and gas, chemical processing, and water treatment.


Specification Description
Outside Diameter 1/2″ – 48″
Wall Thickness 2-40 mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Value Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering
Production Grades Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel

Bend

A bend buttweld fitting is designed to change the direction of flow in a piping system smoothly, typically at angles such as 45° or 90°. These fittings are welded directly to the pipe ends, ensuring a strong and leak-proof connection that can withstand high pressure and high temperature conditions. Manufactured from durable materials like carbon steel, stainless steel, and alloy steel, bend buttweld fittings are widely used in industries such as oil and gas, chemical processing, and power generation to maintain smooth fluid flow and system integrity.


Specification Description
Outside Diameter Seamless Pipe Bends (1/2″ – 24″), ERW / Welded / Fabricated Pipe Bends (2″ – 36″)
Wall Thickness 3mm-40mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Product Angle 0° – 180°
Production Grades Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel
Value Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering

Stub End

A stub end buttweld fitting is a specialized component used in conjunction with lap joint flanges to provide a secure and easy-to-assemble pipe connection. The stub end is welded to the pipe and allows the flange to rotate freely, facilitating alignment and maintenance in piping systems. Manufactured from materials such as carbon steel, stainless steel, and alloy steel, stub ends are commonly used in industries like chemical processing, water treatment, and food processing where frequent disassembly is required.


Specification Description
Outside Diameter 1/2″ – 24″
Type Long/Short Stub Ends
Wall Thickness 2mm – 100mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS
Production Grades Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel
Value Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering

Split Tee

A split tee buttweld fitting is a specialized pipe fitting designed to provide a reliable branch connection in piping systems without the need for welding on the main pipe. It consists of two halves that are clamped around the pipe and welded to the branch, offering easy installation and maintenance. Split tee fittings are made from durable materials like carbon steel, stainless steel, and alloy steel, and are commonly used in oil and gas, chemical processing, and power generation industries for high-pressure and corrosive environments.


Specification Description
Standard – ANSI/ASME ASTM A403 / ASME SA403, ANSI B16.9, ASME B16.25, ASME B16.28, MSS SP-43
DIN DIN2605, DIN2615, DIN2616, DIN2617, DIN28011
EN EN10253-1, EN10253-2
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Size 2″~36″, 15-1200
Pressure 150#~2500#
Wall Thickness Sch 10 - Sch 160
Material Stainless Steel, Carbon Steel, Alloy Steel
Form Split Tees
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