Stainless Steel Slip-On Flange ASME B16.47 Series A Class 300 Forged Construction for Industrial Piping

Our large-diameter stainless steel slip-on flanges are precision-forged to ASME B16.47 Series A Class 300 specifications, designed for heavy-duty industrial piping systems requiring reliable and cost-effective flange connections. Manufactured from ASTM A182 stainless steel grades including F304, F304L, F316, F316L, F321, and Duplex F51/F53, these slip-on flanges combine ease of installation with excellent pressure containment. The raised face (RF) sealing surface ensures optimal gasket seating, while the slip-on design reduces alignment complexity and welding labor during field installation of large-bore piping.

• ASME B16.47 Series A Compliance: Specifically engineered for large-diameter applications (NPS 26 through NPS 60) with bolt circle dimensions, flange thickness, and hub dimensions meeting Series A specifications for maximum interchangeability
• Multi-Grade Material Portfolio: Available in ASTM A182 F304/F304L (standard 18-8), F316/F316L (molybdenum-bearing for enhanced chloride pitting resistance), F321 (titanium-stabilized for high-temperature service up to 800°C), and Duplex F51/F53 grades for extreme corrosion service
• Forged Construction: Hot-forged from solid billet ensures dense, void-free grain structure with mechanical properties significantly exceeding cast equivalent flanges. Ideal for critical service where material integrity is paramount
• Class 300 Pressure Rating: Engineered for medium to high-pressure service with full compliance to ASME B16.5 and B16.47 pressure-temperature rating tables, suitable for demanding process industry applications
• Full Documentation Package: Each shipment accompanied by EN 10204 3.1 material certificates, dimensional inspection reports, Certificates of Origin, and optional third-party inspection reports for complete traceability

With extensive global export capabilities spanning over 50 countries, we provide comprehensive logistics solutions for large-diameter slip-on flanges. Our export team manages end-to-end documentation including Certificates of Origin tailored to your destination country requirements (Form A for GSP countries, Form E for ASEAN, Form F for Chile), commercial invoices, packing lists, bills of lading, and fumigation certificates. Large-diameter slip-on flanges are securely packed in ISPM 15 certified fumigated plywood cases lined with VCI (Volatile Corrosion Inhibitor) anti-corrosion paper and desiccant packs to protect machined surfaces during extended ocean transit. We coordinate with major shipping lines for competitive freight rates and on-time delivery to ports globally.

Our manufacturing flexibility supports comprehensive OEM and brand customization for large-diameter slip-on flanges. We accommodate non-standard bore sizes, custom bolt-hole patterns, specialized face finishes, and modified flange thicknesses beyond standard ASME B16.47 specifications. Brand customization options include permanent laser marking of your company logo, heat number, material grade, and part number directly on the flange OD. Custom packaging solutions feature your corporate branding on plywood cases and pallet labels for professional job-site identification. Our engineering team provides design consultation for custom flange solutions requiring non-catalog specifications and unique application requirements.

• Petrochemical refinery large-bore transfer piping
• Offshore oil and gas platform production manifolds
• Power generation plant cooling water intake systems
• LNG terminal large-diameter transfer lines
• Water desalination plant brine circulation piping
• Pulp and paper mill process liquor piping
• Mining and mineral processing slurry transport lines

Every large-diameter slip-on flange undergoes comprehensive quality inspection in our ISO 9001:2015 certified facility. Our inspection protocol includes: positive material identification (PMI) using handheld XRF spectroscopy on each heat of raw material, full dimensional verification per ASME B16.47 tolerance tables with calibrated instruments, visual inspection for surface defects per MSS SP-55, and hydrostatic pressure testing when specified in purchase orders. We welcome third-party inspection by SGS, Bureau Veritas, TUV Rheinland, and Lloyd's Register at any stage of production to verify compliance with your technical specifications.