EN1092-1 Type12 F316L PN25 RF Socket Weld Flange is molybdenum-containing low-carbon forged socket weld flange, upgraded anti-corrosion version of 304 SW flange, customized for offshore platform, ship cabin, coastal chemical small-bore piping. Upgraded core performance: low-carbon anti-welding intergranular corrosion, Mo element anti-chloride pitting, thickened socket wall high pressure resistance, enhanced salt spray passivation, fillet weld gap anti-crevice corrosion, ATEX explosion-proof qualified for marine fluid pipeline.
Low-carbon optimized F316L material avoids carbide precipitation during welding heating process, preventing socket inner wall intergranular cracking after long-term seawater soaking. Added molybdenum component greatly improves resistance to brine, chloride solution and coastal salt fog electrochemical corrosion, marine service life 2.8 times longer than ordinary F304 socket weld flange. Thickened integrated socket wall upgrades pressure grade to PN25 2.5MPa, bearing higher liquid impact of ship water supply and ballast piping.
Standard EN sized socket bore, match European marine stainless steel seamless pipe perfectly without pipe end cutting modification. Optimized arc transition socket bottom, reduce fluid dead angle, minimize crevice corrosion inside welding gap. Whole body super pickling passivation passed 5000h neutral salt spray test, suitable for open-air coastal piping. Mirror lapped RF face matched marine oil-resistant composite gasket, dual anti-leakage protection. DN20-DN40 marine small bore in stock. Comply with PED pressure equipment certification. Custom anti-corrosion socket coating available. 18-month marine heavy anti-corrosion warranty, full ship inspection documents provided.
Core Product Advantages:1.Low carbon anti-welding grain corrosion;2.Mo-bearing anti-salt chloride erosion;3.Thick socket wall anti-impact deformation;4.Arc socket bottom reduce crevice corrosion;5.ATEX approved for offshore explosion-proof area
Core Spec: Standard: EN1092-1; Pressure: PN25(2.5MPa); Face: RF; Type: Socket Weld; Material: F316L Mo-bearing Stainless Steel; Process: Forged + Enhanced Passivation; Size: DN20-DN40
FAQ:
1:How long is the custom lead time for stainless steel flanges in Wenzhou?
— 8 to 10 working days
2:What is the fastest delivery time?
— 3 working days
3:Do you support non-standard custom flanges?
— Yes, we do.
4:Can you process special sizes?
— Yes. Max processing size: 4000 mm, Min processing size: 30 mm.
5:Do you have stainless steel flanges of standard sizes in stock?
— Yes.
6:Can we customize flanges based on customer drawings or samples?
— Yes.
7:Will material test certificates and inspection reports be provided for the purchased flanges?
— Yes, they will.
8:Is there a quality warranty for the flange products?
— Yes.
9:How to handle quality defects if they occur?
— Product return and exchange available.
10: Why use 316L SW flange for ship pipe?
—A: 304 socket gap easy chloride pitting, 316L eliminates gap corrosion for permanent marine piping.
11:What are the common applicable standards for flanges? How to choose between GB, HG and ANSI standards?
—Flange standards are mainly divided into domestic standards and international standards. The core principle for selection is consistency with the overall piping system standard. For domestic projects, priority shall be given to GB/T9119 series national standards or HG/T20592 series standards issued by the Ministry of Chemical Industry. American standard ANSI B16.5, German DIN standard or Japanese JIS standard are widely adopted for export or foreign-invested projects. The key to selection is to match the standards of your pipes and valves, especially the quantity and pitch circle diameter of bolt holes must be fully consistent.All products manufactured by Shangdian Flange are strictly produced in accordance with corresponding standards. Material certificates and inspection reports can be provided together with shipments.
