Loose Plate Flange

Based on different connection means between flanges and pipes, flange can be divided into 5 main types, which are weld neck flange, threaded flange, socket weld flange, loose plate flange, and slip on weld flange. Among them, loose plate flange is a combination of two types of flanges.

Industrial Processes
Die forging, Machining

Industries Served
Power generation, petroleum, natural gas, chemical, shipbuilding, heating, papermaking, metallurgy

1. Loose Plate Flange(Butt Welding)

Size 
Loose plate flange: 3/8"~48"
DN10~DN1200

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

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
EN 1092-1-2007, EN 1759-1-2004
ISO 7005-1-1992
GB/T 9112-2010, GB/T 9120-2010
HG/T 20592-2009, HG/T 20615-2009
SH/T 3406-2013
GOST- AFNOR- BS- DIN

2. Loose Plate Flange (Flat Welding)

Size
Loose plate flange: 3/8"~24"
DN10~DN600

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

Flange Facing Types
American Series: Flat Face(FF), Raised Face(RF), Tongue(T), Groove(G), Female(F), Male(M)
European Series: Type B(Raised Face), Type C(Tongue), Type D(Groove), Type E(Spigot), Type F(Recess)

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
EN 1092-1-2007, EN 1759-1-2004
ISO 7005-1-1992
GB/T 9112-2010, GB/T 9121-2010
HG/T 20592-2009, HG/T 20615-2009
SH/T 3406-2013
GOST- AFNOR- BS- DIN

Ahad is a professional loose plate flange manufacturer in China which specializes in the production of various kinds of industrial pipe fittings including pipe elbows, pipe crosses, socket weld flanges, socket weld tees and more. All of these products conform to ISO 9000, Pressure Equipment Directive 97/23/EC (PED 97/23/EC), AD2000 Merkblatt W0, and API standard. As a result of their superior quality and competitive price, our products are sought after in many countries, such as Italy, Germany, Spain, France, Russia, the United States, Brazil, Iran, India, among others.
Please contact us if you need any of them.