SS Butt Welded Fittings eblow
Description of the Butt Welded Fittings
| Product Name | elbows, reducers , tees, caps Butt-Welding? Stainless steel seamless and welded Pipe Fitting |
| Size | 1/2″-72″ |
| Wall Thickness | SCH5S, SCH10s,SCH20S,SCH30,STD,SCH40S,SCH60,XS,SCH80S,SCH100,SCH120,,SCH160S,XXS, DIN, SGP JIS? thickness |
| Standard | ASTMA312,? WP403? A234WPB? A420, ANSI B16.9/B16.28/B16.25 |
| JIS B2311-1997/2312, JIS B2311/B2312, DIN 2605-1/2617/2615, | |
| GB 12459-99,EN Standard etc. | |
| Material | Stainless Steel304, 304L, 304H, 316, 316L, 316H, 310, SS321, SS321H, 347, 347H,? 904L |
| ?Duplex SS 2507, DSS2205, UNS31803? UNS32750 | |
| 1.4301,1.4306, 1.4401, 1.4435, 1.4406, 1.4404 | |
| Carbon Steel A234 WPB, WP5, WP9,WP11, WP22, A420WPL6, A420WPL8 | |
| ST37.0,ST35.8,ST37.2,ST35.4/8,ST42,ST45,ST52,ST52.4 | |
| STP G38,STP G42,STPT42,STB42,STS42,STPT49,STS49 | |
| Surface | Sandblast , acid pickling, Polished |
| Application | Low and middle pressure fluid pipeline,boiler, petroleum and natural gas industry, |
| drilling,chemical industry, electric industry,shipbuilding,fertilizer equipment and pipeline, | |
| structure,petrochemical,pharmaceutical industry,etc. |
Features /Characteristics
? Buttweld fittings are?pipe fittings used to?change the pathway of a pipeline (elbows), reduce/increase the pipe bore size (reducers),?branch (tees, cross) or blind a pipeline (butt weld cap)
? Buttweld fittings are available in multiple shapes (elbows, tees, reducers, crosses, caps,?stub ends),?material grades?(carbon, high-yield carbon, low-alloy, stainless, duplex, and nickel alloys),
and?dimensions?(2 to 24 inches in seamless execution, and welded for larger pipe sizes).
? The key specifications for buttweld fittings are the?ASME B16.9?(carbon and alloy fittings) and the?MSS SP 43?(that integrates ASME B16.9 for stainless steel, duplex,?and nickel alloy BW fittings).
? Just as the pipe is sold from Schedule 10 to Schedule 160, butt weld pipe fittings are sold the same way.
Welded butt weld fittings are more common in stainless steel due to cost advantage. Sch 10S, SCH40S SS fittings are also more common in stainless steel butt weld fittings.
Common material for butt weld fittings are A234 WPB (A & C also available), High Yield Carbon Steel, Stainless Steel 304 and 316 and Nickel Alloys.
? Welded pipe fittings in carbon steel and stainless steel are the joining components that make possible the assembly of valves,
pipes and equipment onto the piping system. Welded fittings compliment pipe flanges in any piping system and allows:
1.Change direction of flow in a piping system
2.Connect or joint pipes and equipment
3. Provide branches, access and takeoffs for auxiliary equipment
Technical Data Sheets of the ANSI B16.9 pipe fittings (Elbow )
? ? Table 1- Dimension of Long Raduis? Elbow?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Table 2? Dimension of Long Raduis Reducing Elbow
?Table 3? Dimension of Long Raduis (LR) 180 returns? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Table 4? ?Dimension of Short Raduis (SR)Elbow?
Table 5? Dimension of Short? Radius Bend Return? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Table? 6? ?Dimension of 3D elbow
Pipe fititngs eblow Production Process?
1.??Receiving and? Inspection
2. Material Identification?
3. Elbow/ Reducer/Tee /Cap? Shape Forming?
??
4. Welding Process
4.?Heat Treatment
5.?Shot Blasting
6. After Bevelled
7.? After Polished?
Questions & Answers ( Q&A )
Q:Customer asked for butt weld fittings in A105:
A: Most common carbon steel buttweld fitting material is A234WPB. It is equivalent to A105 flanges, however there is no such thing as an A105 or A106 butt weld fitting.
A106 Gr.B is for pipe grade. The A234WPB fittings are made from A106GR.B pipes. A105 is a material from Bar forged to be High pressure Fittings or Flange
Q: Customer?requests “Normalized” butt weld fittings:
A: ?This is also a misconception since flanges are available in A105 and A105 N, where N stands for normalized.
However, there is no such thing as A234WPBN. Manufactures normalize their butt weld fittings was considered that normalized heat treating process was done, Espeically for the elbows and Tees
Customer needing “normalized” butt weld fittings should request WPL6 fittings which are high yield and are normalized as a standard procedure.
Q: Customer forgets to mention pipe schedule:
A:?Buttweld fittings are sold as per pipe size but pipe schedule must be specified to match the ID of the fitting to the ID of the pipe. If no schedule is mentioned, we will assume a standard wall is requested.
Q; Customer forgets to mention welded or seamless butt weld fitting:
Butt weld fittings are available in both welded and seamless configuration. A seamless butt weld carbon steel or stainless steel fitting is made of seamless pipe and is generally more expensive.
Seamless pipe fittings are NOT common in sizes bigger than 12”. Welded pipe fittings are made of ERW welded carbon steel or stainless steel pipe. They are available in sizes ?” to 72” and are more affordable than seamless fittings.
Q: What does Short Radius (SR) or Long Radius (LR) means?
A: You will often hear SR45 elbow or LR45 elbow. The 45 or 90 refers to the angle of the bend for buttweld fitting to change the direction of flow.
A long radius elbow (LR 90 Elbow or LR 45 elbow) will have a pipe bend that will be 1.5 times the size of the pipe. So, a 6 inch LR 90 has bending radius that is 1.5 x nominal pipe size.
A short radius elbow (SR45 or SR90) has a pipe bend that is equal to the size of the fitting, so a 6” SR 45 has a bending radius that is 6” nominal pipe size.
Q: What is a 3R or 3D elbow pipe fitting?
A: First, the terms 3R or 3D are used synonymously. A 3R butt weld elbow has a bending radius that is 3 times the nominal pipe size. A 3R elbow is equal to 3D Elbows
