304 Stainless Steel Threaded Flange Class300, Thickened Medium Pressure Weld-Free Flange for Industrial Pressure Pipelines

304 Class300 thickened medium-pressure threaded flange is an upgraded high-strength weld-free fitting designed for industrial pressure fluctuation and alternating pipeline load. With thicker body and wider flange disc than Class150 products, it provides higher pressure resistance and structural rigidity for medium-pressure pipeline systems without welding requirements. Forged from high-quality solid 304 austenitic stainless steel billets with professional stress relief heat treatment, the product achieves uniform and dense internal structure to resist pressure impact, pipeline vibration and fatigue deformation, avoiding long-term warping, deformation and loosening. High-precision CNC NPT taper thread delivers excellent self-locking performance, tighter under dynamic medium pressure to eliminate common micro-leakage and thread loosening defects of ordinary threaded flanges. 304 steel resists moisture, industrial atmosphere and weak corrosive media, suitable for continuous medium-pressure transmission of circulating water, process auxiliary fluid and common industrial gas. Welding-free installation improves construction safety and efficiency without professional welding equipment, ideal for explosion-proof workshops, oil and gas plants and flammable fire-prohibited areas. Flat smooth sealing surface and accurate bolt holes ensure tight fitting and stable sealing under alternating medium-pressure load without fatigue failure. All products pass NDT inspection, dimension recheck, thread fitting test and anti-rust passivation before delivery, with superior quality to ordinary machined threaded flanges. Widely used in industrial medium-pressure circulating water systems, mechanical pressure interfaces, explosion-proof process pipelines, light chemical auxiliary pipes, pressurized HVAC networks and environmental equipment connections. We provide mass stable production of thickened Class300 flanges without material cutting corners, supporting fast delivery for medium-pressure industrial projects.

Core Selling Points

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

2.  Thickened and widened body for vibration and fatigue resistance;

3.  Self-locking taper thread ensures tight sealing under dynamic pressure;

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

5.  Stress relief heat treatment guarantees long-term structural stability;

6.  Integral forging eliminates internal leakage risks;

7. Adaptable to dynamic pressure and frequent start-stop impact;

8. Standard universal size for full engineering compatibility.

   
   

Application Scenarios

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

Why Choose Us

We specialize in thickened medium-pressure threaded flange production with strict control of billet thickness and heat treatment to avoid deformation and leakage caused by insufficient material and residual stress. Secondary thread finishing and pairing test ensure higher sealing accuracy and stability. Every batch passes pressure adaptation test and full dimension inspection with complete project acceptance documents for long-term industrial and overseas project cooperation.

Customization Ability

Custom ultra-thickened reinforced Class300 flanges; deepened high-strength thread for medium pressure; special non-standard sizes for explosion-proof equipment; widened and thickened structural upgrade; BSP/G imperial thread conversion; enhanced high-strength passivation; batch laser traceability marking; exclusive marine export 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.