ANSI B16.5 Flange

What is ASME/ANSI B16.5 flange?

American National Standard ANSI B16.5 “steel pipe flange and flange fittings” is a mature and advanced standard which is more popular and common internationally. The standard and other related ANSI, API, ASTM, MSS pressure piping application standard system formed based on a large number of experimental studies, and has undergone decades of practical testing, so it is a scientific and advanced standard, and widely accepted by various countries.

Available Size: 1/2″-60″ 

Class: CLSS 150lbs, 300lbs, 400lbs, 600lbs, 900lbs, 1500lbs, 2500lbs.

Material Grade:

Carbon Steel Flanges: A105, A350, A181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706 

Stainless Steel Flanges: A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Flange type

WN (Welding Neck Flange)

SO (Slip On Flange)

BL (Blind Flange)

TH (Threaded Flange)

LJ (lap Joint Flange or Loose Flange)

SW (Socket weld Flange)

Flange face type

RF (Raised face flange)

FF (Flat face flange)

RTJ (ring-type joint face)

M&F (Male-and-Female)

T&G (Tongue-and-Groove)

Zhongnuo has full experience and expertise in manufacturing all types of steel flanges, the flanges we produced are precise in dimensions, have tighter tolerances than standard, flawless surfaces, and solid protective layers. Zhongnuo manufactures a wide variety of steel pipe flanges meeting the following standards:

• ANSI/ASME (American National Standards Institute/American Society Mechanical Engineers) B16.5 and B16.47 in forged carbon and stainless steels, typically ASTM/ASME A105; ASTM/ASME A182; ASTM/ASME 350 and other materials.
• DIN (Deutsches Institute fur Normung) forged flange in carbon steel and stainless steel, popular materials like RST37.2, P235GH, P245GH, P250GH, P280GH, etc.
• European standard EN 1092-1, typically steel grade is RST37.2, P235GH, P245GH, P250GH, P280GH, etc.
• JIS Flange (Japanese Industrial Standards). The JIS is the standard used for all industrial activities in Japan. Common material like SUS304, SUS316, SUS316L, SS400, SFVC2A.
• SANS/SABS 1123 South African flanges standard.
• AWWA (American Waterworks Association) flanges are typically designed for low-pressure applications (300 psi or less).
• BS 4504 Flange
• BS 10 Flange
• Please choose your interested standard below: