Weld Neck Flange

A weld neck flange is a type of industrial 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 known 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, high or low temperature conditions.

Size
Weld neck flange: 3/8"~160"
DN10~DN4000

Pressure
American Series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500
European Series: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400

Flange Facing Types
American Series: Flat Face(FF), Raised Face(RF), Tongue(T), Groove(G), Female(F), Male(M), Ring Joints Face(RJ)
European 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)

Materials
Carbon Steel: ASTM/ASME A105, ASTM/ASME A516 Grade 55-60-65-70
Alloy Steel: ASTM/ASME A182 F1-F12-F11-F22-F5-F9-F91-F911-F92
Stainless Steel: ASTM/ASME A182 F304-F304H-F304L-F304N-F304LN F316-F316H-F316L-F316N-F316LN F321-F321H F347-F347H, ASTM/ASME A182 F51-F52-F53-F54-F55-F60-F61
Low-Temperature Steel: ASTM/ASME A522, ASTM/ASME A707 Grade L1-L2-L3-L4-L5-L6-L7-L8
High-Strength Steel: ASTM/ASME A694 F42-F46-F48-F50-F52-F56-F60-F65-F70

Standards
ASME B16.5-2013, ASME B16.47-2011
API 605-1988
MSS SP-44-2010
EN 1092-1-2007, EN 1759-1-2004
CSA Z245.12-13-2013
ISO 7005-1-1992
AS 2129-2000
GB/T 9112-2010, GB/T 9115-2010, GB/T 13402-2010
HG/T 20592-2009, HG/T 20615-2009, HG/T 20623-2009
SH/T 3406-2013
GOST- AFNOR- BS- DIN

Industrial Processes
Die forging, Machining

Industries Served
Electrical power, petroleum, natural gas, chemical, shipbuilding, heating, papermaking, metallurgy

As a premium weld neck flange manufacturer in China, Ahad offers a variety of industrial pipe fittings to satisfy your specific requirements, which include butt weld fittings, industrial flange, forged fittings, steel pipes and so on. Our products are made in accordance with ISO 9000, Pressure Equipment Directive 97/23/EC (PED 97/23/EC), AD2000 Merkblatt W0, and API standard. Ahad is located in Cangzhou, 180 km from Beijing and 90 km from the major port city of Tianjin. This location offers us abundant raw materials and gives us access to convenient transportation by sea, land, and air.
You are welcome to contact us for more information.