Butt Weld Fittings
Butt weld pipe fittings are kind of pipe fittings with good quality, which are widely used in the construction industry, mainly including stainless steel, carbon steel, low alloy steel and alloy steel butt welded pipe fittings. Compared with ordinary weld pipe fittings, butt weld fittings have more durable characteristics and are not easy to deteriorate due to the influence of external environmental conditions. Butt Weld fittings play an indispensable role in construction engineering and are popular among common use.
A butt weld fittings are weldable pipe fitting that can change flow direction, branch off, reduce size or connect auxiliary equipment. Butt weld fittings include elbow, tee, reducer, cap and cross. These fittings are the most common type of welded pipe fittings and are specified by nominal pipe size and pipe schedule. The raw materials of butt welded pipe fittings are seamless pipe, welded pipe, forged pipe (high pressure) and steel plate. The forming processes of butt weld fittings is as follow: Extrusion moulding, hot pressing, cold machining, hot machining, welded, heat treatment. Huashang Steel is one of the best buttweld fittings suppliers from China.
Butt Weld Fittings Types
Commonly used butt weld fittings are mainly divided into elbow, tee, reducing pipe and pipe cap, among which elbow, tee, reducing pipe are mostly made of seamless steel pipe or welded steel pipe, through pushing, drawing, extrusion, and pipe cap is mostly made of steel plate stamping.
Butt Weld Fittings Manufacture Specification：
ASME/ANSI B16.9, JIS B 2311/2220, DIN2605/2616/2615, EN10253, MSS SP-43/SP-75, GOST 17375/17376/17378/17379
Butt Weld Fittings Type：
-(SMLS or Welded) Elbow，45°，90°，LR，SR
-(SMLS or Welded) Tee
-(SMLS or Welded) Reducer
-(SMLS or Welded) Stub Ends
-Special Type acc. to customer's drawings.
Elbow: according to different sizes, the elbow is divided into long radius elbow and short radius elbow; according to different manufacturing methods, it can be divided into push bending, squeeze bending and pipe bend bevelling.
Tee: according to the size of the diameter, the tee is divided into equal diameter tee, reducing tee, y type tee.
Reducer: reducer usually has concentric reducer and eccentric reducer.
Cap: the cap is usually divided into flat cap and standard oval cap. Among them, the flat cover tube cap is easier to manufacture and lower in price, but its bearing capacity is not as good as that of the standard elliptical head, so it is often used under the condition of DN≤100 and medium pressure below 1.0mpa. The standard is an oval head with flanged edges. The ratio of the inner diameter of the ellipse to the length of the shaft is 2:1. It is the most widely used cap.
Butt Weld Fittings Materials：
Stainless Steel: OCr18Ni9, 0Cr18Ni9Ti, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 00Cr19Ni10, 00Cr17Ni14Mo2, ASTM A403-WP304, WP304L, WP304/304L, WP304H, WP316, WP316L, WP316/316L, WP321, WP321H, WP347, WP347H
Super Stainless Steel: ASTM 904L, B366-N08904, A403-WP317, 317L, 254SMO(UNS S31254)
Duplex & Super Duplex Steel: ASTM A815-S31803, S32205, S32750, S32760, 2205
Low Temp. Steel: ASTM A420-WPL6, WPL3,
Alloy Steel: 12CrMo, 15Cr5Mo, Cr5Mo, 12Cr1MoV, 16Mn, ASTM A234-WP11, WP22, WP91, WP5, WP9
Pipeline Steel: L245, L290, L360, L415, L450, L485, ASTM A860 (MSS SP-75)- WPHY42, WPHY52, WPHY60, WPHY65, WPHY70
Carbon Steel: ASTM A234-WPB, WPC
Nickel Alloy Steel: B361 WP6061, B366 N08904, N010276, N04400, N06600, N08825, N10276
B625 N08904, B574 N04400 , N06600, N010276, B649 N08904
Seamless products DN15 ( 1/2'' )-- DN800 ( 32'' )
Welded products DN450 ( 18'' ) --DN3000 ( 120'' )
SCH 5S --- SCH 160