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hebeihaihao

Hebei haihao high pressure flange & pipe fitting group was established in 1982, located in Mengcun County the hometown of pipe fittings in China.


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Steel pipes

At Haihao, we manufacture and stock a lot range of steel piping products . These products include: Steel pipes, Pipe fittings; Forged flanges , in various specifications and materials (Carbon steel ,Alloy steel ,Stainless steel.)

Steel Pipe TypeSteel Pipe StandardsSteel Pipe Material

Steel Pipe Type


Steel Pipe Standards


Steel Pipe Material


GB 20 carbon seamless steel pipe

GB 20# carbon steel bar for steel pipe ,flange and pipe fittingsThis group of Chinese (GB) standard specifications covers carbon and alloy steel plates and forgings used in boi ...


GB Q235 ordinary structural carbon steel pipes

GB Q235 ordinary structural carbon steel plate for pipe,flange and pipe fittingsWhat is Q235,The difference between Q235A and Q235B?Ordinary carbon steel – General Board, ...


GOST 20295-85 K52 Seamless Steel Pipe

GOST 20295-85 K52 Seamless Steel PipeSteel gradeChemical composition,%,maxCMnSiSPCrNiCuVCarbon steel0.220.650.370.040.0350.250.30.3–Low alloy steel0.21.650.60.0350.0330.8 ...


JIS G3455 STPG370 Carbon steel pipe

JIS G3454 Stpg370 Steel Pipes Carbon Steel PipesThis japanese Industrial Standard specifies the carbon steel pipes, hereinafter referred to as the “pipes”, used for ...


JIS G3101 General Structure Hot Rolled SS400 Steel

JIS G3101 SS400 JIS G3101 SS400 steel plate/sheet, under JISG3101 standard, we can regard SS400 steel plate/sheet for general purpose structural steel.JIS G3101 SS400 is a tech ...


JIS G3455 STPG42 Carbon steel pipe

1. Scope This japanese Industrial Standard specifies the carbon steel pipes, hereinafter referred to as the “pipes”, used for pressure service at an approximate max ...


JIS STPG38 Carbon Steel Seamless pipe for mechanical structur ...

1. Scope This japanese Industrial Standard specifies the carbon steel pipes, hereinafter referred to as the “pipes”, used for pressure service at an approximate max ...


P235GH : European specified steel for use in pressure vessels ...

P235GH is a European specified steel for use in pressure vessels, boilers and heat exchangers. The composition of this steel makes it ideal for applications where elevated work ...


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