ASTM A105 Series A flanges are large-diameter forged carbon steel components designed per ASME B16.47. Series A (formerly MSS SP-44) is characterized by a heavier profile and larger bolt circles compared to Series B, providing higher structural integrity for massive piping systems. The Slip-On design allows the pipe to slide through the bore for double fillet welding. Forged for durability, these 150LBS flanges are the standard for large-scale water, oil, and gas transmission lines exceeding 24 inches.
Technical Attributes
Material Grade: ASTM A105 Carbon Steel
Standard: ASME B16.47 Series A
Flange Type: Slip-On SO
Pressure Class: 150 LBS
Size Range: NPS 26 to NPS 60
Manufacturing: Forged Ring Rolled
Facing Type: Raised Face RF
RF Height: 0.06 inch 2mm
Connection: Double Fillet Weld
Carbon Content: Max 0.35 percent
Yield Strength: Min 250 MPa 36 ksi
Tensile Strength: Min 485 MPa 70 ksi
Hardness: Max 187 HBW
Temp Range: -29C to 425C
Surface Finish: 125-250 AARH Serrated
Bore Size: Pipe OD plus clearance
Certification: EN 10204 3.1 MTR
Industry: Large Scale Infrastructure
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
