Butt welding elbows are a type of pipe fitting used to change the direction of flow in piping systems. They are typically manufactured from seamless or welded pipe and have a smooth inner surface to minimize pressure drop and turbulence. The following are some specific details about butt welding elbows:
Materials: Butt welding elbows can be manufactured from a variety of materials, including carbon steel, stainless steel, alloy steel, and other metals. The material selection depends on the intended application, including the temperature, pressure, and corrosive environment.
Sizes: Butt welding elbows are available in various sizes ranging from ½ inch to 72 inches in diameter. The most common sizes used in industrial piping systems are 90-degree and 45-degree elbows.
Wall thickness: The wall thickness of butt welding elbows varies depending on the diameter and material of the elbow. The wall thickness is typically equal to the thickness of the pipe from which it is made.
Degrees of bend: Butt welding elbows are available in various degrees of bend, including 90 degrees, 45 degrees, and 180 degrees. Other degrees of bend, such as 60 degrees and 30 degrees, are also available but less common.
Standards: Butt welding elbows are manufactured to various standards, including ASTM, ASME, MSS, and API. Compliance with these standards ensures that butt welding elbows meet certain performance and quality requirements.
End connections: Butt welding elbows have two ends that are designed to be welded to pipes or other fittings. The ends can be either beveled or plain, depending on the welding requirements and the specific application.
Overall, butt welding elbows are a critical component in piping systems, and their selection must be based on the specific requirements of the application.
The following table is a brief introduction for Butt Welding Elbows. The specific requirements about the Butt Welding Fittings, welcome to contact and talk more !
| Specification | Description |
| Degree | 45°, 90°, 180°, or according to customer’s requirements |
| Radius | Short radius (SR), long radius (LR), or according to customer’s requirements |
| Wall Thickness | SCH 10, SCH 20, SCH 40, SCH STD, SCH 80, SCH XS, SCH 160, XXS or according to customer’s requirements |
| Size Range | 1/2" to 72" (DN15-DN1800) (Seamless & Welded upon the sizes ) |
| Material | ASTM A234 WPB, A420 WPL6, A234 WP11, A234 WP5, A403 WP304/L, A403 WP316/L, or other specified material |
| End Connection | Butt weld, socket weld, threaded, or flanged |
| Surface Treatment | Black painting, anti-rust oil, or hot-dipped galvanized |
| Inspection | In-house testing, third-party inspection, or according to customer’s requirements |
| Certification | Mill test certificate (MTC), EN10204 3.1 or 3.2, or according to customer’s requirements |
Butt welding fittings are manufactured to meet various standards set by organizations such as ASTM, ASME, MSS, and API. The following are some common standards used for butt welding fittings:
| SME/ ANSI Standard Pipe Fittings | ANSI B16.9-2012-Factory Made Wrought Steel Butt welding Fittings |
| ANSI B16.11-2005-Forged Fittings,Socket Welding and Threaded | |
| ANSI B16.25-2012-Butt welding Ends | |
| ANSI B16.28-1994 Wrought Steel Butt Welding Short Radius Elbows And Returns | |
| ANSI B16.49-2012 Factory Made Wrought Steel Butt welding Induction Bends for Transportation and Distribution Systems | |
| ANSI B36.19M 2004 Stainless steel pipe | |
| ANSI B36.10M 2004 Welded and Seamless Wrought Steel Pipe | |
| MSS SP Pipe Fittings | MSS SP-75-2004 Specification for High Test,Wrought,Butt Welding Fittings |
| MSS SP-25-1998 Marking System for Valves,Fittings,Flanges and Unions | |
| MSS SP-43-2008-Wrought and Fabricated Butt Welding Fittings for Low Pressure,Corrosion Resistant Applications | |
| EN Standard Pipe Fittings | BS EN 10253-1 Butt Welding Pipe Fittings Part 1:Wrought Carbon Steel for General Use and Without Specific Inspection Requirements |
| BS EN 10253-2 Butt welding pipe fittings part 2: Non alloy ferritic alloy steels with specific inspection requirements | |
| BS EN10253-3 Butt welding pipe fittings Part 3: Wrought austenitic and austenitic ferritic(duplex)stainless steels without specific inspection requirements | |
| BS EN 10253-4 Butt welding pipe fittings Part 4:Wrought austenitic and austenitic-ferritic(duplex)stainless steels with specific inspection requirements | |
| BS EN 10241 2000 Steel threaded pipe fittings | |
| DIN Standard Pipe Fittings | DIN 2605 part1 1991 Steel butt welding pipe fittings elbows and bends with reduced pressure factor |
| DIN 2605 part2 1995 Steel butt welding pipe fittings elbows and bends for use at full service pressure | |
| DIN 2609 1991 steel butt welding pipe fittings technical delivery conditions | |
| DIN 2615 part1 1992 steel butt welding pipe fittings tees with reduced pressure factor | |
| DIN 2615 part2 1992 steel butt welding pipe fittings Tees for use at full service pressure | |
| DIN 2616 part1 1991 steel butt welding pipe fittings eccentric reducers with reduced pressure factor | |
| DIN 2616 part2 1991 steel butt welding pipe fittings reducers for use at full service pressure | |
| DIN2617 1991 steel butt welding pipe fittings caps | |
| DIN 2982 screwed steel pipe fittings parallel nipples,taper nipples | |
| DIN 2986 threaded steel pipe fittings sockets | |
| DIN 28011 torispherical heads | |
| GOST Standard Pipe Fittings | GOST 17375-2001 carbon and low alloy steel butt welding fittings.Sharply curved bends type 3D(R=1,5 DN).Design |
| GOST 17376-2001 carbon and low alloy steel butt welding fittings.Tees.Design | |
| GOST 17378-2001 carbon and low alloy steel butt welding fittings reducers design | |
| GOST 17379-2001 carbon and low alloy steel butt welding fittings Elliptical caps Design | |
| GOST 17380-2001 carbon and low alloy steel butt welding fittings general specifications | |
| GOST 30753-2001 carbon and low alloy steel butt weldings fittings sharply curved bends type 2D(R=DN)design | |
| JIS Standard Pipe Fittings | JIS B2311-2009 steel butt welding pipe fittings for ordinary use |
| JIS B2312-1997 Steel butt welding pipe fittings | |
| JIS B2313-2009 steel plate butt welding pipe fittings | |
| JIS B2316-2007 steel socket welding pipe fittings | |
| ISO Standard | ISO 3419 Non-alloy and alloy steel butt welding fittings |
| ISO 5251 stainless steel butt welding fittings |
The choice of surface finish depends on the specific application and the requirements of the piping system.
Mainly surface finish for Butt Welding Fittings: Painting, Anti-corrosion coating, Thermal insulation coating, Galvanizing,......
Painting:
Anti-corrosion coating :
Thermal insulation coating:
Galvanizing ( Hot-dip galvanizing and cold galvanizing):
Plywood cases, Plywood pallets, Cartons, bare , or package customer required.
