304 Stainless Steel Threaded Flange Class300, Medium Pressure Thickened High-Strength Weld-Free Flange

304 Class300 medium-pressure threaded flange is an upgraded thickened version for industrial pressure fluctuation and general corrosion conditions. With thicker body and higher bearing capacity than Class150 flanges, it is designed for medium-pressure pipeline systems requiring no welding. Forged from high-quality 304 austenitic stainless steel with stress relief heat treatment, the product features uniform and dense internal structure to resist pressure impact, pipeline vibration and fatigue load. High-precision CNC NPT taper thread provides strong self-locking performance, tighter under pressure to avoid loosening and micro-leakage. 304 steel resists moisture, weak acid, alkali and industrial atmospheric corrosion, suitable for continuous medium-pressure fluid pipelines. Welding-free installation is perfect for explosion-proof workshops, oil and gas plants and flammable construction areas with no open fire allowed. Accurate bolt holes and high parallelism flange face ensure stable sealing under alternating medium-pressure load without deformation. All products pass dimension calibration, thread fitting test and anti-corrosion treatment before delivery, better than ordinary plate-machined threaded flanges. Widely applied in industrial medium-pressure water circulation, process auxiliary pipelines, mechanical pressure interfaces and explosion-proof pipe systems.

Core Selling Points:

1. Class300 medium-pressure grade with higher bearing capacity;

2. Thickened body for deformation, vibration and fatigue resistance;

3. Self-locking NPT taper thread for tighter sealing under pressure;

4. Welding-free design for explosion-proof and fire-prohibited areas;

5. 304 corrosion-resistant material for general industrial conditions;

6. Integral forging without interlayer to prevent leakage;

7. Easy disassembly for high maintenance efficiency;

8. Standard dimension for full engineering interchangeability.

Application Scenarios:

Factory explosion-proof medium-pressure pipelines, industrial pressurized circulating water pipes, mechanical pressure interfaces, light chemical process pipelines, HVAC pressurized systems, environmental equipment fluid connections, tank auxiliary pipes, fire-prohibited pipelines in oil and gas plants.

Why Choose Us:

We specialize in thickened medium-pressure threaded flanges with strict control of billet thickness and heat treatment, avoiding inferior thin products with insufficient pressure resistance. Secondary precision thread turning ensures uniform fitting gap and stable sealing. Every batch passes pressure adaptation test and full dimension inspection, providing complete documents for industrial explosion-proof and mechanical engineering projects.

Customization Ability:

Custom thickened reinforced Class300 flanges; deepened thread teeth for medium pressure; special sizes for explosion-proof equipment; thickened and widened flange for higher pressure resistance; BSP/G imperial thread conversion; high-strength passivation anti-rust treatment; batch laser traceability marking; exclusive export protective packaging.

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:How long is the general lead time for custom flanges? How many days is the fastest delivery?

—Relying on an integrated intelligent manufacturing system and self-owned heat treatment workshop, Shangdian Flange greatly shortens the turnover time of working procedures. The customized lead time for conventional non-standard flanges is 8–10 working days; simple specifications can deliver samples in as fast as 3 days. For emergency project maintenance and rush project orders, we offer a priority expedited channel, arranging priority production on the production lines to minimize delivery lead time to the greatest extent.

11:What non-standard customization services are available for flanges? Can large-diameter and special-size flanges be processed?

—We support all-round non-standard customization, with machining available for large calibers, special dimensions, special alloys and special industrial standards. Detailed customizable scope is listed as below:

1. Materials: 304 stainless steel, 316L stainless steel, duplex stainless steel, Hastelloy alloy, nickel-based alloy and other grades can be customized;

2. Dimensions: Large-diameter flanges ranging from DN15 to DN4000 and above are machinable;

3. Standards: Products compliant with ASME (US standard), DIN (German standard), JIS (Japanese standard), or clients’ exclusive non-standard drawings are all available for production;

4. Product types: Both heavy-duty industrial flanges and high-purity sanitary flanges can be customized to meet your requirements