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Large Diameter Welding Flange
  • Large Diameter Welding FlangeLarge Diameter Welding Flange

Large Diameter Welding Flange

The Large Diameter Welding Flanges produced by Longan have a wide range of applications and many advantages: first, the anti-corrosion performance is quantified, which is more than 15 years longer than ordinary flanges. Second, the super-sized stable processing doubles the pressure bearing capacity | Leakage rate ≤0.001%. Finally, we have a lot of experience in customized product design, so come and contact us!

Experimental data

1. As the professional manufacturer, we would like to provide you Large Diameter Welding Flange. Improved engineering efficiency: From 8 hours/piece → 4 hours/piece, reducing the installation and adjustment time by half. Seal failure rework rate: <0.1%, far lower than the industry average of 2.5%.


2. Cost saving:

Reduced spare parts inventory cost, single project reduces redundant flange procurement by 35%

Through the use of large welded flanges on offshore platforms, it is known that the maintenance interval has been greatly improved from 5 years to 8 years


Technical certification:

ISO 9001:2015 quality system

Third-party inspection report: SGS material composition/mechanical properties test

ASME B16.47 Series A/B certification, etc.


Customized enhanced design | Reduce installation cost by 40%

Bolt hole positioning: CNC drilling error ±0.02mm, shorten pipeline alignment time by 50%

Thickened neck design: For example, 36″ flange standard thickness 40mm → large welded flange 52mm, wall thickness ≥ 1.3 times of standard flange

Groove accuracy: ±0.5° automatic groove machine cutting, reducing welding filler material by 30%


Please provide your working condition parameters to obtain customized flange solutions and pressure calculation solutions:

1: Global logistics: 30-ton flange export packaging experience

2: Free engineering consultation

3: 3D model delivery within 72 hours

Large Diameter Welding Flange



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