Welding Neck Flange

We also accept all kinds of OEM jobs.

Non-Standard & special design is also available.

           BS4504-3.1,JPI 7S-15-93,NF E29-203,ISO7005-1,EN1092 etc.

           Germany Standard: DIN2605-1/DIN2630/2631/2632/2633/2634/2635/2636/2637/2638/2501;

           Japanese Standard: JISB2311,JISB2312,B2220

            API 605,AWWA C207;                  

            American Standard: ASME/ANSI B16.5, ANSIB16.47,MSS SP-44,ASME B16.37,

6.Standard:  ASME, ANSI, API, MSS,AWWA,JIS, DIN, JPI, UNI, BS, AS,NF,EN,ISO like

                  like ASTM A105, A516 Gr.70,A234 GR.WPB,A335 GR.WP11/WP22, A182-  F11 CL2,F5,F304/304L,F316/316L,F321,A350-LF2,A403-WP304/304L/316/316L/321/321H,etc.

5. Material: Carbon Steel, Stainless Steel and Alloy Steel in cast or forged 

4. Style of flange sealing face: (RF),(RTJ), (FF), (MFM), (LG), (RG).

3 .Pressure: ANSI CLASS 125LB ~ 2500LB; JIS 5K ~ 30K; PN1 ~ PN400

        SCH80, SCH100,SCH120,SCH140,SCH160,XXS; DIN S3 3D, DIN S3 5D ,SGP/LG

        SCH5/5S,SCH10S,SCH40S,SCH80S,SCH10,SCH20,SCH30,STD,SCH40,SCH60,XS,

2. Thickness (Standard conform to ASME B36.10M and ASME B36.19M):

1. Size: from 1/2" to 120" ((15mm - 3000mm)

This Group of Flange can be available from us in an extensive range for industrial use as follows:

WIN-WIN Welding Neck Flange is designed with a hub on the backside tapering to a diameter that will match the pipe to which it will be welded. These flanges are bored to match the inside diameter of the mating pipe so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. Welding neck flanges are preferred for use in severe service applications involving high pressure, sub-zero and/or elevated temperatures. They also provide excellent stress distribution through the tapered hub and are easily radiographed for flaw detection.

W.N. FLANGE, 12INCH,2500#, RTJ, SCH.60, ASTM A182 F11,ANSI B16.5

Forged Alloy Steel W.N.Flange