ASME B16.47 Series A 904L Blind flanges are designed for large-diameter, high-pressure applications in extreme environments. Forged from super-austenitic 904L stainless steel, these solid discs provide exceptional resistance to sulfuric and phosphoric acids. Series A flanges (formerly MSS SP-44) feature a heavier, more robust profile than Series B, making them the industry standard for large-scale chemical reactors and offshore platforms where structural integrity and corrosion resistance are paramount.
Technical attributes
Standard: ASME B16.47 Series A
Material Grade: ASTM A182 F904L
Alloy Type: Super-Austenitic Stainless
Flange Type: Blind (BLRF)
Pressure Class: 150 to 900 LBS
Size Range: NPS 26 to NPS 60
Manufacturing: Forged and Machined
Facing Type: Raised Face (RF)
Surface Finish: 125-250 AARH
Nickel Content: 23.0 to 28.0 percent
Chromium Content: 19.0 to 23.0 percent
Molybdenum: 4.0 to 5.0 percent
Copper Content: 1.0 to 2.0 percent
Yield Strength: Min 220 MPa
Tensile Strength: 490 to 710 MPa
Hardness: Max 192 HBW
Certification: EN 10204 3.1
Service Environment: Highly Corrosive / Acidic
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
