Flat Flange

Technical features

1. Improved dynamic sealing performance

Under the helium test standard, the leakage rate can reach ≤10⁻⁶ mbar·L/s, which is 10⁻⁴ higher than the industry average

Cycle life: 15MPa→0MPa alternation, Flat Flange passed 10,000 pressure fluctuation tests

Core technology: Laser etching double spiral sealing pattern, increasing the contact pressure of the sealing surface to 28MPa, 10MPa more than the traditional flat flange.

2. Weight is reduced by 45% and space occupancy is reduced by 60%.

Thickness: Traditional flange: 20-30mm, while our product is 12±0.2mm, nearly doubled

Weight: 304 stainless steel material is only 1.8kg/piece, while the national standard flange of the same caliber weighs 3.3kg.

Compact equipment compartment can save installation space 0.35m³/100 pieces of Flat Flange, reducing costs.

3. Doubled corrosion resistance

Salt spray test: ASTM B117 standard 2,000 hours without rust

Coating technology: Acid and alkali resistant pH range 1-13, 5μm nano Al₂O₃ composite coating

Applicable media: LNG (-162°C), covering extreme fluids such as liquid chlorine (99.8%) and concentrated sulfuric acid (98%).

Installation efficiency

Link Traditional flange Flat Flange Efficiency improvement

Bolt pre-tightening torque 85Nm (four corners alternately) 55Nm (single time standard) 35% labor saving

Single group hole alignment time 45±5 minutes 12±2 minutes 73%

Repair and disassembly time 30 minutes/piece 8 minutes/piece 79%

Solve the sealing failure caused by thermal cycle

Pre-tightening force self-compensation structure: Under 200-550°C working conditions, the sealing specific pressure only decays ≤8% (traditional flange decays 15-30%)

Thermal expansion coefficient matching design: Flat Flange body and bolts are made of the same series of stainless steel (316L) to avoid stress leakage when the temperature difference is greater than 100°C