Hebei Haihao Flange Factory



Haihao pipe fitting department is the steel pipe fitting division of Hebei Haihao High Pressure Flange Pipe Fitting Group Co.,Ltd, we manufacture ,supply and serve our clients all over the world in the steel pipe fittings field, especially the butt welding pipe fittings.

Hebei Haihao pipe fitting plant is established in 1988.At the beginning , we start production from carbon steel elbows ,then steel pipe tees years later.In the 21 century, we establish the new factory to produce the stainless steel pipe fittings. Now our pipe fittings plants can manufacture most kinds of steel pipe fittings used in industry pipeline.

Flange Standards

SANS/ SABS 1123 Flanges

The SANS/SABS 1123 flange stands as a standard in flange design established by the South African Bureau of Standards (SABS), widely adopted across the African market. Primarily designed for low-pressure pipelines and equipment, this flange standard finds applicability in diverse industries including petroleum, chem ... + Read more

ASME B16.36 Class 300 Orifice Flanges,Welding Neck,Threaded,and Slip-On Dimensions

Haihao Group manufacture & supply orifice flanges according to ASME B16.36-2015 standard,the product material can be carbon steel,stainless steel,alloy steel.The nominal size for orifice flanges are 1″-24″. 1inch SS304 RF Orifice Flange ASME B16.36-2015 Class 300 Orifice Flanges,Welding Neck,Threade ... + Read more

ASME B16.36 Standard Specification For Orifice Flanges

ASME B16.36-2015 standard covers pressure-temperature ratings,materials,dimensions, tolerances, testing, and making of flanges (similar to those covered in ASME B16.5) that have orifice pressure differential connections. Coverage is limited to the following: a) welding neck flanges Classes 300, 600, 900, 1500, and ... + Read more

ANSI/ASME B16.5 class 2500 weld neck flange

ANSI/ASME B16.5 standard covers pressure,temperature,ratings,materials,dimensions,tolerances,marking, testing,and methods of designating openings for pipe flanges and flanged fittings.Weld neck flange dimensions are covered in ANSI/ASME B16.5 for size NPS ½” to 12″ for above NPS 26″ to 60″ i ... + Read more