304 Stainless Steel Blind Flange RF PN10 GB/T9123, Forged Blank Flange for Municipal Water & Gas Pipeline End Sealing

    

304 Stainless Steel Blind Flange (BL Flange) is solid forged pipeline end closure fitting widely used for low-pressure general industrial piping. Manufactured in accordance with GB/T9123 standard, this RF raised face blind flange adopts one-piece die forging technology without internal porosity, designed to permanently or temporarily block pipeline terminals, reserve expansion interfaces and conduct hydrostatic pressure test.

Raw material adopts ASTM A182 F304 austenitic stainless steel, featuring balanced mechanical performance, excellent atmospheric rust resistance and cost advantage. Precision CNC machining ensures flatness of sealing face and accurate bolt hole pitch, perfectly matching GB standard welding neck flange, slip on flange and plate flange. After pickling & passivation surface treatment, the flange forms dense anti-corrosion layer to resist humidity, fresh water and mild atmospheric medium erosion. Widely applicable for static sealing under PN10 nominal pressure, easy to assemble and disassemble for later pipeline renovation.    Core Selling Points

1. Integral die forging structure, dense interior, no sand hole or hidden crack, stable pressure bearing performance

2. Genuine ASTM A182 F304 raw material, good rust-proof performance for outdoor municipal projects

3. Standard RF raised sealing face, excellent gasket fitting effect, long-term zero leakage sealing

4. Strictly comply with GB/T9123 dimension standard, fully interchangeable with national standard flanges

5. Complete size range DN25-DN300, sufficient stock, fast delivery for bulk municipal orders

6. Smooth machined surface, uniform passivation treatment, attractive appearance and stable quality

   Available Materials: F304, F304L, F316, F316L

   Application Scenarios: Municipal tap water pipeline plugging, urban natural gas branch termination, factory idle pipeline closure, pipeline hydrostatic test temporary blanking, building fluid pipeline reserved port sealing

   Why Choose Us

   We are professional forged blind flange manufacturer with more than 12 years production experience. All PN10 304 blind flanges adopt solid forging instead of plate cutting, effectively avoiding layered crack risk. Every batch implements PMI spectrum inspection, dimension full inspection and visual appearance screening. We hold ISO9001 certification and can issue official EN10204 3.1 MTR material test certificate. Support mixed batch small trial orders and large-scale engineering continuous supply. We provide one-stop flange matching solution for global municipal engineering contractors.

   Customization Capabilities

   1.Non-standard diameter, customized thickness and special bolt hole layout

   2.Convert sealing face: RF / FF / MFM according to client drawing

   3.Custom enhanced passivation, mechanical polishing surface treatment

   4.Laser engraving LOGO, standard mark, heat number and project code

   5.Extra thickened blind flange for improved safety factor

   6.Export fumigation wooden case packaging, separate batch labeling service

   7.Pre-shipment third-party inspection arrangement upon request

   
   

   Q:

   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:What is the difference between forged blind flange and plate cutting blind flange?

   — Forged blind flange has uniform metal fiber structure, better impact resistance and pressure resistance, suitable for formal engineering; plate cutting blank plate is only recommended for temporary low-pressure short-term usage.