Weld Neck Flange

A weld neck flange is a type of steel flange designed to transfer stresses to the pipe to reduce high stress concentrations at the base of the flange. Compared with other types,weld neck flanges are know for their tapered hub and gentle transition from flange thickness to pipe wall thickness. They are deformation-resistant, and are normally used for high pressure piping system, high or low temperature conditions.

Size

Weld neck flange:1/4″-160″

DN8-DN4000

Pressure

America Series:Class 150 ,Class 300, Class 600, Class 900A ,Class 1500,Class 2500.

Europe Series:PN2.5,PN6,PN10,PN16,PN25,PN40,PN63,PN100,PN160,PN250,PN320,PN400.

Flange Facing Types

America Series:Flat face(FF),Raised face(RF),Tongue(T),Groove(G),Female(F),Male(M),Ring type joints face(RJ/RTJ)

Europe Series:Type A(Flat Face),Type B(Raised Face),Type C(Tongue),Type D(Groove),Type E(Spigot),Type F(Recess),Type G(O-Ring Spigot),Type H(O-Ring Groove)

Material

Carbon steel: ASTM A105,ASTM A105N,GB 20,C22.8.

Alloy steel: ASTM/ASME A182 F1-F12-F11-F22- F5-F9- F91

Stainless steel: ASTM/ASME A182 F304-304L-304H-304LN-304N

ASTM/ASME A182 F316-316L-316H-316LN-316N-316Ti

ASTM/ASME A182 F321-321H, F347-347H

Low temperature steel: ASTM/ASME A350 LF2.

High performance steel: ASTM/ASME A694 F42 , F52, F56, F60, F65, F70

Standards

ASME ANSI B16.5,ASME ANSI B16.47.

API 605,API 6L.

MSS SP 44

CSA Z245.12

EN1092-1,EN1759-1.

DIN2630,DIN2631,DIN2632,DIN2633,DIN2634,DIN2635,DIN2636,DIN2637,DIN2638.

BS1560,BS 4504,BS 10.

AFNOR NF E29-200-1

ISO7005-1

AS2129

JIS B2220

UNI 2276. UNI 2277.UNI 2278 .UNI 6089 .UNI 6090

Industrial Processes

Die forging,Machining.

Application for weld neck flanges

Natural gas,chemical,petroleum,ship building,marine,paper making, metallurgy, electric, power, boiler , etc.

HEBEI HAIHAO GROUP supply flanges used extensively with pipe fittings in all kinds of industrial applications,including:

natural gas,chemical,petroleum,ship building,marine,paper making,metallurgy,electric,power,boiler,etc. Depending on different applications,

we have the following materials for the flanges:

Carbon steel: ASTM A105,ASTM A105N,GB 20,C22.8. Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911

Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H

Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6

High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70

Our flanges are usually according to different standards for different customers and projects:

America standard: ANSI B16.5,ANSI B16.47,ETC.

German standard: DIN 2573/DIN 2576/DIN 2631/DIN 2632/DIN 2633/DIN 2634/ DIN2635/DIN 2527 Japen standard: JIS B2220

Europe standard: BS4504/BS 10/UNI 2276 UNI 2277/UNI 2278/ UNI 6089/UNI 6090/EN 1092.

We also manufacture other un-standard flanges according to customers’requirements, and some forgings. These products have passed the ISO9000, ISO14001, GB/T28001, and Q/SY1002.1 certification. Due to our high quality and low prices, our products are well received in the global market, in countries such as the USA, Italy, Belgium, Chile, Bolivia, United Arab Emirates, Brazil, South Korea, India and more.