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From 1/2" to 120"—Carbon, Stainless, or Alloy. Delivered to 100+ Countries with Full Traceability.

Product detail

Product Specification:

Size Range: 1/2”- 120”( DN 15 - DN 3000)

Rating: 150, 300, 400, 600, 900, 1500, 2500;

Type: Welding Neck, Long Welding neck, Slip on, Blind, Spectacle Blind,

Lap joint, Socket weld, Threaded, Orifice, Ring Joint Flange,

Spacer and Blank, Anchor Flange, API flange, etc.

Standard: ANSI B16.5, ANSI B16.47 Series A & Series B, AWWA C207, BS4504,

BS3293, DIN EN1092-1, API590, JIS/KS, ISO 7005-1, JB/T, etc.

Material: Carbon steel, Low Temperature Carbon Steel, High Yield Carbon Steel,

Plate Material, Low Alloy Steel, Stainless Steel, Duplex Stainless Steel.

C.S: A36, A105, A266 CL2/CL4, ST37.2, C22.8, S235JR, S355JR;

LTCS: A350 LF2 CL1/CL2/LF3;

HYCS: A694 F42/F52/F60/F62/F65/F70;

Plate: A515 Gr60/70, A516 Gr 60/70, A285 Gr A B C, A240 304, A240 316

LAS: A182 F5, F9, F11 CL1/CL2/CL3, F12 CL1/CL2, F22 CL1/CL3, F91

SS: A182 F304/L, F304H, F316/L, F317/L, F44

Duplex SS: A182 F51/UNS 31803, F53/UNS 32750

Application: Can be widely used in the field of Gas, Oil, Pipeline,Water Supply, Electricity and Machinery.

Flanges are welded to pipe and equipment nozzle. Accordingly, it is manufactured from the following materials;

Carbon steel

Low alloy steel

Stainless steel

Combination of Exotic materials (Stub) and other backing materials

The list of materials used in manufacturing is covered in ASME B16.5 & B16.47.

ASME B16.5 -Pipe Flanges and Flanged Fittings NPS½”to 24”

ASME B16.47 -Large Diameter Steel Flanges NPS 26”to 60”

Commonly used Forged material grads are

Carbon Steel:–ASTM A105, ASTM A350 LF1/2, ASTM A181

Alloy Steel:–ASTM A182F1 /F2 /F5 /F7 /F9 /F11 /F12 /F22

Stainless Steel:–ASTM A182F6 /F304 /F304L /F316 /F316L/ F321/F347/F348

Flange material standards

ASTM A105: This standard covers forged carbon steel piping components, including flanges, that are suitable for use in high-pressure applications.

ASTM A182: This standard covers forged or rolled alloy steel pipe flanges, forged fittings, and valves and parts intended for high-temperature service.

ANSI B16.5: This standard specifies the dimensions, tolerances, and markings for steel pipe flanges and flanged fittings.

DIN 2632-2638: This standard defines the dimensions and tolerances for flanges made from steel, including carbon steel, stainless steel, and other alloys.

ASME B16.47: This standard covers large diameter steel flanges, typically used in high-pressure applications where larger bore sizes are needed.

BS 4504: This British standard covers circular flanges for pipes, valves, and fittings, with nominal sizes ranging from 15 to 600 mm.

Frequently used astm grades

Standard

ASME standards

ASME B16.1 – Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250

ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard

ASME B16.20 – Ring Joint Gaskets and Grooves for Steel Pipe Flanges

ASME B16.21 – Nonmetallic Flat Gaskets for Pipe Flanges

ASME B16.24 – Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500, and 2500

ASME B16.34 – Large Diameter Steel Flanges (NPS 26 through NPS 60)

ASME B16.36 – Orifice Flanges

ASME B16.42 – Ductile Iron Pipe Flanges and Flanged Fittings: Classes 150 and 300

ASME B16.47 – Large Diameter Steel Flanges (NPS 26 Through NPS 60)

ASTM standards

ASTM A105 – Specification for Carbon Steel Forgings for Piping Applications

ASTM A182 – Specification for Forged or Rolled Alloy Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High Temperature Service

ASTM A193 – Specification for Alloy Steel and Stainless Steel Bolting Materials for High Temperature Service

ASTM A194 – Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure and High Temperature Service

ASTM A694 – Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service

ASTM A707 – Specification for Flanges, Forged, Carbon and Allow Steel for Low Temperature Service

AWWA standards

AWWA C115 – Standard for Flanged Ductile Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges

ISO standards

ISO 5251 – Stainless steel butt-welding fittings

MSS standards

MSS SP-6 – Standard Finishes for Contact Faces Pipe Flanges and Connecting End Flanges of Valves and Fittings

MSS SP-9 – Spot Facing for Bronze, Iron and Steel Flanges

MSS SP-25 – Standard Marking Systems for Valves, Fittings, Flanges, and Unions

MSS SP-44 – Steel Pipeline Flanges

MSS SP-53 – Quality Standards for Steel Castings and Forgings for Valves, Flanges and Fittings and Other Piping Components – Magnetic Particle

MSS SP-54 – Quality Standards for Steel Castings and for Valves, Flanges and Fittings and Other Piping Components – Radiographic

MSS SP-55 – Quality Standards for Steel Castings and for Valves, Flanges and Fittings and Other Piping Components – Visual

MSS SP-75 – High Test Wrought Butt Welding Fittings

MSS SP-106 – Cast Copper Alloy Flanges and Flanged Fittings Class 125,150, and 300

ASME B16.5 and ASME B16.47 cover pipe flanges up to NPS 60 (B16.5 from 1/2″ to 24″ and B16.47 from 26″ to 60″). ANSI

B16.47 covers two series of flanges, Series A is equal to MSS SP-44-44, and Series B is equal to API 605 (API 605 has been canclled).

Process

Why you can't ignore us

1.Complete Size Range: You won't need a second supplier. We cover everything from DN 15 to DN 3000 (1/2” - 120”).

2.Pressure Ready: Whether you need standard 150 LBS or high-pressure 2500 LBS, your specs are standard for us.

3.Material Agnostic:

(1)Need Carbon Steel (ASTM A105)? Done.
(2)Need Stainless (304/316)? Ready.
(3)Need Alloy Steel (ASTM A182)? In stock.
(4)Complex Types Handled: Weld Neck, Slip On, Blind, Socket Weld, Threaded, or Lap-joint — all under one roof.
4.Why you are safe with us (Risk Reversal):
(1)Documentation Safety: You never worry about compliance. You get full MTC (Material Test Certificates), ISO 9001/14001/45001, CE, and GOST certs with every shipment.
(2)Third-Party Verified: Our quality is validated by the giants: SGS, BV, TUV, DNV. If they trust us, you can too.
(3)Fortune 500 Vetted: You are joining a supply chain that already supports Shell, ExxonMobil, CNPC, and Aramco. We know the strict demands of top-tier EPC projects.
(4)Project Experience: From Oil & Gas exploration to Shipbuilding and Power Gen — we understand your industry's specific "unspoken" requirements.