Flanges

ASME B16.5 Flanges

Size Range: 1/2″–24″ (DN15–DN600), suitable for most piping systems.
Flange Types: Weld Neck (WN), Slip-On (SO), Socket Weld (SW), Threaded (THD), Lap Joint (LJ), Blind (BL).
Pressure Ratings: 150# to 2500#, ensuring safe operation under various conditions.
Facing Options: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), and Male/Female (M/F) for versatile sealing.
Materials： Carbon steel, alloy steel, stainless steel, nickel alloys — must comply with ASTM/ASME forging standards (e.g., A105, A350, A182, A694).

Size Range：26″–60″ (DN650–DN1500), designed for large-diameter piping systems.
Series Options：Series A (formerly MSS SP-44) and Series B (formerly API 605), meeting different design strength and bolt-load requirements.
Flange Types：Weld Neck (WN), Blind (BL).
Pressure Ratings：Class 75, 150, 300, 400, 600.
Facing Options：Raised Face (RF), Ring Type Joint (RTJ).
Materials：Carbon steel, alloy steel, stainless steel, nickel alloys — must comply with ASTM/ASME forging standards (e.g., A105, A182, A350).

Size Range：DN10–DN4000, covering small to large-diameter piping systems in metric standards.
Flange Types (Common Form Types)：Type 01 – Plate Flange, Type 11 – Welding Neck Flange, Type 12 – Slip-On Plate Flange, Type 13 – Threaded Flange, Type 21 – Loose Flange with Weld-On Plate Collar, Type 34 – Blind Flange
Pressure Ratings (PN Classes)：PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, higher (PN 63, PN 100, PN 160, PN 250, PN 400) also available depending on type.
Facing Options：Type A – Flat Face (FF), Type B1 / B2 – Raised Face (RF), Type C/D/E/F – Tongue & Groove, Type G/H – Male & Female
Materials：Carbon steel, alloy steel, stainless steel — manufactured according to EN material specifications, such as: EN 10222-2 (carbon & alloy steel forgings), EN 10222-5 (stainless steel forgings)
Typical grades: P245GH, P280GH, 16Mo3, 13CrMo4-5, 1.4301 (304), 1.4404 (316L) etc.

Size Range：DN10–DN2000, suitable for a wide range of metric piping systems depending on DIN flange series.
Flange Types (Common Form Types)：
DIN 2573 / DIN 2576 – Plate Flanges (PN 6 / PN 10)
DIN 2501 – Flange dimensions (PN 10 / PN 16 / PN 25 / PN 40)
DIN 2631 / DIN 2632 / DIN 2633 / DIN 2634 / DIN 2635 / DIN 2636 / DIN 2637 / DIN 2638 – Welding Neck Flanges (PN 6 to PN 400)
DIN 2565 / DIN 2566 – Threaded Flanges
DIN 2641 / DIN 2642 – Loose Flanges with Weld-On Collar
DIN 2527 – Blind Flanges
Pressure Ratings (PN Classes)：PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, higher (PN 63, PN 100, PN 160, PN 250, PN 400) also available depending on type.
Facing Options：Flat Face (FF), Raised Face (RF), Tongue & Groove (T/G), Male & Female (M/F)
Materials：Carbon steel, alloy steel, stainless steel — manufactured according to EN material specifications, such as: EN 10222-2 (carbon & alloy steel forgings), EN 10222-5 (stainless steel forgings)
Typical grades: P245GH, P280GH, 16Mo3, 13CrMo4-5, 1.4301 (304), 1.4404 (316L) etc.

Size Range：4″–144″ (DN100–DN3600), designed primarily for waterworks, wastewater, and low-pressure industrial piping systems.
Flange Types (Common Form Types)：Ring Flange (most common), Blind Flange, Hub Flange, Slip-On Flange (less common, depending on fabrication)
Pressure Ratings (AWWA Service Classes)：Class B – up to 86 psi (0.6 MPa), Class D – up to 175 psi (1.2 MPa), Class E – up to 275 psi (1.9 MPa), Class F – up to 300 psi (2.1 MPa)
Facing Options：Flat Face (FF), Raised Face (RF)
Materials：Carbon steel plate – ASTM A36, A516 Gr. 55/60/70, Carbon steel forging – ASTM A105, Stainless steels (for AWWA C228) – ASTM A182 F304, F316