CLASS 300 Flange

B16. 5 is limited to flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints.

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ANSI B16. 5 class 150 covers dimensions for weld neck flanges from 1/2" to 24" nominal pipe size diameter with or without 1/16" raised face.

pipe flange


Pressure rating is defined as the maximum allowed pressure that a flange can withstand at increasing temperatures. According to the ANSI/ASME B16. 5 specification, there are seven flange pressure ratings: 150, 300, 400, 600, 900, 1500, and 2500


1. Standard:ANSI B16.5
2. Type:Plate flange,Slip on,BlindLap Joint flange
3. Pressure Class:Class 150,Class 300,Class 400,Class 600
4. Dimension:1/2''-24''
5. Surface Treament:Anti-rust oil; Yellow paint; Black paint;Hot dip Galavnised; Zinc.
6. Raw Material:A105;A105N
7. PackingWooden Case, Pallet.
8. Payment:L/C, T/T
9. Delivery time:30 ~60 days after confirm the order



QualificationBV CertificationLloyd's Register CertificationPressure Equipment Directive

Flange manufacturer







1. Standard:ANSI B16.5
2. Type:Plate flange,Slip on,BlindLap Joint flange
3. Pressure Class:Class 150,Class 300,Class 400,Class 600
4. Dimension:1/2''-24''
5. Surface Treament:Anti-rust oil; Yellow paint; Black paint;Hot dip Galavnised; Zinc.
6. Raw Material:A105;A105N
7. PackingWooden Case, Pallet.
8. Payment:L/C, T/T
9. Delivery time:30 ~60 days after confirm the order

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