Standard list of various fittings

National standard
GB12459 steel butt welded Seamless Pipe
GB / T13401 steel plate welded pipe fittings
GB / T14383 forged steel welded pipe fittings
GB / T14626 forged steel thread fittings
GB9112-9131 Steel Pipe flange, flange cover and flange gasket
Sinopec Standard
SH3406 petrochemical steel pipe flange
SH3408 steel butt welded seamless pipe
SH3409 forged steel welded pipe fittings
SH3410 steel plate made of welded pipe fittings
Chemical standards
HGJ514 carbon steel, low alloy steel seamless welded pipe fittings
HGJ528 steel seam welded pipe fittings
HGJ10 forged steel welded pipe fittings
HGJ529 forged steel socket welding, thread and butt welding station
HGJ-44-76-91 steel pipe flanges, gaskets, fasteners
HG20592-20635 steel pipe flanges, gaskets, fasteners
In the oil standard
Steel - to - welded pipe fittings
SY5257-91 steel elbow
Power standards
Typical Design Manual for Parts and Components of Steam Pipeline Parts for Thermal Power Plants
DL / T515 power station elbow
American standard
ASME / ANSI B16.9 Welded steel fittings made of factory forged steel
ASME / ANSI B16.11 Socket Welding and Thread Forging Fittings
ASH / ANSI B16.28 Steel Rivet Small Radius Elbow and Back Bend
ASME B16.5 pipe flange and flange fittings
ASME / ANSI B16.36 orifice flange
ASME B16.47 Large Diameter Steel Flange
MSS SP-43 forged stainless steel butt welds
MSS SP-83 socket welding and threaded union
MSS SP-97 socket, threaded and butt weld end of the overall reinforced tube seat
Seamless and Welded Steel Pipe
Stainless Steel Seamless and Welded Steel Pipe ANSI / ASME B36.19
Japanese standards
General steel welded pipe fittings
JIS B2312 steel welded pipe fittings
JIS B2313 steel plate welded pipe fittings
JIS B2316 steel socket welded pipe fittings
Steel pipe fittings for steel JIS B2302
JIS B2220 steel pipe flange
JIS B2201 ferrite material pipe flange pressure grade
Coated gaskets for pipe valves
General purpose carbon steel tubes
Standard Specification for Carbon Steel Pipe for Pressure Gauge
Standard Specification for Carbon Steel Pipe for Pressure Gauge
Standard Specification for Carbon Steel Pipe for High Temperature
Arc welding carbon steel pipe JIS G3457
JIS G3458 alloy steel pipe
JIS G3459 Stainless Steel Pipe
Arc welding large diameter stainless steel pipe

German standards
Fittings and elbows for welded pipe fittings
DIN 2615 steel welded pipe fittings tee
DIN 2616 steel welded Pipe Reducer
DIN 2617 steel welded pipe fittings cap
DIN 2527,2573,2576,2627 ~ 2638, 2673,2552,2653, 2655,2656,2641, 2642,2565 ~ 2569 German standard flange series

British standards
BS 1560 Circular flanges for pipes, valves and fittings
BS 4504 Circular flanges for pipes, valves and fittings
Only listed commonly used GB, the Ministry of Chemical Industry standard, the power of the standard, petrochemical standards, American Standard, international standards
Like the ship industry standard and other small-scale application of the standard is not listed, the Japanese standard, German standard ISO is not comprehensive, no Russian standard
Standard for Casting Fittings ISO2531 / BSEN545
Russian standards
Flange GOST 12820-80
GOST 12821-80
Cap GOST
Elbow GOST
GOST
Reducing pipe GOST

[Threaded pipe] Basic description of the connection form
Threaded pipe series includes three connection forms: socket welding connection (SW), butt welding (BW), threaded connection (TR)
Pressure Level
Threaded pipe to withstand the pressure level, the general socket welding, butt welding connection pipe fittings pressure level is divided into 3000LB (SCH80), 6000LB (SCH160), 9000 (XXS). Threaded connection pipe fittings pressure rating is divided into 2000LB, 3000LB, 6000LB.
The definition of threaded fittings, mainly by the round steel or ingot molded forging rough molding, and then by the lathe machine forming a high-pressure pipe connection accessories.
Common standard for threaded fittings
Fitting Manufacturing Standard Reference:
ASME B16.11, HG / T, MSS SP-83, MSS SP-79, MSS SP-97, MSS SP-95, GB / T, SH / T3410-96, GD2000, GD87, 40T025 -2005, etc., can also be based on drawings for non-standard processing production.

45 Degree Elbow and 90 ° elbow ,  90 Degree Elbow forming a right angle and 45 degrees is an obtuse angle. Two 45-degree elbows can not be welded into a 90-degree bend to use, because the stress concentration area is the elbow pipe, expansion and most of the stress deformation during cooling are released at the elbow. Also weld itself to be the weak link, fatigue deformation will soon cause cracking damage, which planted a lot of hidden dangers, so do not at immediate convenience, eventually leading to huge losses.

45 Degree Elbow

45 Degree Elbow,45 Degree Elbow Fitting ,45 Degree Pipe Elbow,Steel 45 Degree Elbow

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