316 Stainless Steel Blind Flange Molybdenum Alloy Blank Flange for Light Chemical Pipeline

316 Stainless Steel Blind Flange conforms to EN1092-1 Type05 standard, RF raised face, PN16 pressure rating. Alloyed with molybdenum element, F316 material achieves significantly better resistance to chloride ion, weak acid and salt water compared with 304 grade. This forged blind flange is widely used for light chemical industry, wastewater treatment and coastal projects where slight corrosion medium exists.

Integral closed die forging eliminates internal loose structure. CNC machining controls flatness and perpendicular tolerance to ensure uniform bolt tightening force during installation. After pickling & passivation treatment, surface anti-corrosion performance is improved obviously. It can withstand intermittent erosion of dilute acid, salt solution and humid coastal atmosphere. Suitable for medium pressure permanent pipeline termination and maintenance isolation. Please note F316 material still faces sensitization risk under repeated high temperature welding; for frequent welding scenarios, 316L low carbon version is recommended.

Core Selling Points

1. Molybdenum contained F316 material, superior chloride corrosion resistance vs 304 stainless steel

2. Fully comply with European EN1092-1 dimension standard, interchangeable with EU piping fittings

3. Solid forged structure, reliable mechanical performance under PN16 medium pressure

4. High precision RF sealing face, stable sealing under slightly corrosive medium

5. Size range DN15-DN400, support European engineering bulk orders

6. Balanced cost and corrosion performance for coastal and light chemical projects

   Available Materials: F316, F316L, S32205

   Application Scenarios: Light chemical plant pipeline blanking, coastal factory fluid pipeline sealing, salt water circulating system terminal closure, electroplating wastewater pipeline isolation, printing & dyeing auxiliary pipeline plugging

   Why Choose Us

   We produce EN standard stainless steel flanges for over 10 years, familiar with European engineering procurement requirements. All 316 blind flanges carry PMI molybdenum content inspection. We can issue test certificate according to EN10204 3.1. Stable delivery schedule for EU clients. Support pre-production sample confirmation before mass order. Strictly control surface finish to meet European importer acceptance criteria.

   Customization Capabilities

   1.Full EN standard size series, custom non-standard OD & thickness

   2.Change sealing face into FF / MFM as client drawing

   3.Enhanced marine grade passivation for coastal corrosive environment

   4.Laser marking standard EN code, heat number and material grade

   5.Export wooden packaging compliant with EU fumigation regulation

   6.Provide dimensional inspection report before shipment

   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: Difference between 316 and 316L blind flange?

    — 316 is normal carbon grade, economical for less welding occasion; 316L low carbon avoids intergranular corrosion after welding, suitable for frequent hot working construction.