FORGED FLANGES

We are forged flanges manufacturer, supplier and exporter for a wide range of quality industrial forged steel pressure flanges including welding neck flange, slip-on flanges, socket weld flanges, blind flanges and other shapes for connection applications in the oil, gas, chemical, wind, pharmaceutical and other industries, manufactured in accordance with ASME , DIN, JIS, GB, ANSI, GOST, EN, BS and other engineering standards.

Pipe flange facing of america system, ring joint face except raised face, large or smalltongue face and groove face, large or smallmale face and female face, all can be manufactured according to standard.

Orifice flange equipped with orifice plate is used to measure the flow.Theere are two symmetrical, radial through holes in flange which is parallel to the sealed face.The distance to the sealed face is 0.94inch(23.9mm). They are equipped with two plugs of size NPT 1/2 mating the threaded hole in the outer end. The diameter of through holes as following.

Forged Flanges Type：

SW;WN;SO;BL;LJ;TH ; FF,RTJ

Forged Flanges Forming:

Forged

Forged Flanges Size:

1/2”—120”

Forged Flanges Standard:

GB9112~9124, GB13402, SH3406, HG20615~20623, HG20592~20605, JB74~90, ISO7005-I, ASME/ASNI B16.5/16.36/16.47A/16.47B, MSS SP44, JIS B2220-2001, DIN 2527/2636/2637/2638/2566/2576/2632/2633/2635/2642/2653/2655/2656, DIN2628/DIN2629, DIN2634 , BS 1560-3.1, BS4504-3.1, API 7S-15, API 7S-43, API 605, NFE 29-203 GOST12821 GOST 12820

Forged steel flangesRating:

ANSI 150LBS~2500LBS

DIN PN6~PN400

JIS 5K~30K

HG PN0.25~PN25

Forged Flanges Material:

Stainless Steel ：

OCr18Ni9, 0Cr18Ni9Ti, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 00Cr19Ni10, 00Cr17Ni14Mo2, ASTM A182-F304, F304L, F304H, F316, F316L, F321, F321H, F347H, F317,

Super Stainless Steel:

ASTM A182-904L, 317, 317L

Duplex Steel：

ASTM A182-F51, F53, F44

Special Steel ：

N06600, N08800, N08811

Alloy Steel：

16Mn, 12CrMo, 15Cr5Mo, Cr5Mo, 12Cr1MoV, ASTM A182-F11, F22, F91 F9 F5

Pipe Line：

ASTM A694-F42, F46, F48, F50, F52, F56, F60, F65, F70, F80

Carbon Steel ：

ASTM A350-LF2, LF3 Q235A, 20#, ASTM A105

Tolerance of flange (ASME /ANSI standard)

Thread ,Socket-welding,Slip-on, Lap joint and Blind flange Tolerence			Welding neck raised face flange tolerence
Outside Diameter	≦24"	±1.6mm	Outside Diameter	≦24"	±1.6mm
	>24"	±3.2mm		>24"	±3.2mm
Inside Diameter	Threaded	Within limits on boring gauge	Inside Diameter	≦10”	±0.8mm
	Socket-welding	ID≦10"+0.8mm ID≧12"+1.6mm		<20”	±1.6mm
	Slip on			≧20”	-1.6mm +3.2mm
	Lap joint		Diameter of hu at base	≦24”	±1.6mm
Outside Diameter of Hub	≦5"	+2.4mm -0.8mm		>24”	±3.2mm
	≧6"	+ 4.0mm -0.8mm	Diameter of hub at point of welding	≦5"	-0.8mm +2.4mm
Diameter of contact face	1/16”raised face	±0.8mm		≧6"	-0.8mm +4.0mm
	1/4”raised face tongue&groove male,female	±0.4mm	Diameter of contact face	1/16”raised face	±0.8mm
Diameter of counterbore	Same as for inside diameter			1/4”raised face tongue&groove male,female	±0.4mm
Drilling	Bolt circle	±1.6mm	Drilling	Bolt circle	±1.6mm
	Bolt hole spacing	±0.8mm		Bolt hole spacing	±0.8mm
	Eccentricity of bolt circle with respect to facing	<2-1/2” Max 0.8mm ≧3” Max 1.6mm		Eccentricity of bolt circle with respect to facing	<2-1/2” Max 0.8mm ≧3” Max 1.6mm
	Eccentricity of bolt circle with respect to bore	Max 0.8mm		Eccentricity of bolt circle with respect to bore	Max 0.8mm
	Eccentricity of facing with respect to bore	Max 0.8mm		Eccentricity of facing with respect to bore	Max 0.8mm
Thickness	≦18”	0-+3.2mm	Thickness	≦18”	1-+3.2mm
	≧20”	0-+4.8mm		≧20”	1-+4.8mm
Length thru hub	≦10”	±1.6mm	Length thru hub	≦10”	±1.6mm
	≧12”	±1.6mm		≧12”	±1.6mm

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