Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.
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Product Spec Sheet
Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.
Donglin, Mengcun County, Cangzhou City, Hebei Province, China
Generated on: 2026-06-24
Source URL: https://www.chinahaihao.com/en/products/seamless-butt-welding-pipe-fittings
Elbow

Seamless Butt Welding Pipe Fittings

Seamless butt-welding fittings overview: elbows, tees, reducers and caps to ASME B16.9 / B16.28 / MSS SP-75 / GB/T 12459, for low- to high-pressure piping (including ASME B31.3 Chapter IX).

无缝对焊管件总览（弯头/三通/异径管/管帽）
Category
Elbow
Material / Standard
ASTM A234 WPB/WPC/WP11/WP22/WP91, ASTM A420 WPL6/WPL3, ASTM A403 WP304/WP316L, MSS SP-75 / ASTM A860 WPHY-52/60/65/70
Size range
1/2" - 48" (21mm - 1219mm)
Pressure / Wall
STD, XS, Sch 160, XXS (per ASME B36.10M / B36.19M)
Applications
Used in oil & gas, petrochemical, gas transmission, power generation (incl. subcritical/supercritical main steam and reheat lines), shipbuilding, boiler & pressure-vessel piping, food and pharmaceutical piping projects; scope follows ASME B31.1 / B31.3 / B31.4 / B31.8.
Technical specs
Materials: carbon, low-alloy, alloy, austenitic stainless, duplex. Elbows by hot-pushing, pressing or cold extrusion; tees by hot-extrusion or hydraulic bulging; reducers by shrinking/expanding; caps by pressing or spinning. Wall schedule per ASME B36.10M (carbon/alloy, STD/XS/Sch 40/80/120/160/XXS) or B36.19M (stainless S series). Dimensions and tolerance per ASME B16.9 (NPS 1/2–48) and B16.28 (SR NPS 1/2–24); large bore above NPS 48 to MSS SP-75 / ASTM A860 WPHY; factory-made induction bends to ASME B16.49. Per ASME B16.9 Section 2 (Pressure Ratings), butt-welding fittings carry no Class pressure rating — working pressure equals that of seamless pipe of the same material, schedule and OD. Final material, schedule, angle, radius and applicable code per drawing or RFQ.

Description

Seamless butt-welding pipe fittings cover four product families — elbows, tees, reducers and end caps — all manufactured to ASME B16.9 (NPS 1/2–48 long-radius), ASME B16.28 (short-radius NPS 1/2–24), MSS SP-75 / ASTM A860 (WPHY high-strength low-alloy) and GB/T 12459. Elbows change pipe direction (45°/90°/180°) at 1.5D long-radius or 1.0D short-radius per B16.9. Tees branch the main line (equal or reducing). Reducers transition between bore sizes (concentric or eccentric). Caps close pipe ends (typically ellipsoidal heads). All fittings are bevelled for butt-welding to seamless pipe of the matching material; final grade, schedule and heat-treatment state per drawing / RFQ.

Referenced standards

  • ASTM A234
    Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
    ASTM International
  • ASTM A403
    Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
    ASTM International
  • ASTM A420
    Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
    ASTM International
  • MSS SP-75
    Specification for High-Test, Wrought, Butt-Welding Fittings
    Manufacturers Standardization Society (MSS)

Contact

Manufacturer
Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.
Mobile
+86 132 9342 5333
Email
haihaojituan@163.com
Website
www.haihaohuadian.com