Flanges
A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts Neck Flanges
We are manufacturing all types of Flanges ,Weld neck flanges of the following specifications
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Carbon Steel
SA105/A105, SA694/A694, F42-F60
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Low Temperature
SA350 / LF2
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Stainless Steel
SA182/A182 F306/F306L, F316/F316L, F321
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Alloy Steel
SA350/A350 LF6; SA707/A707 L3, SAE 4130/AISI 4130
API Flanges
4130 API 6A flanges have a weld neck to connect to pipework, and are designed to bolt to a corresponding sized flanged end. They are secured with a gasket to ensure a pressure-tight seal. TriumphOS manufacture and supply flanges from top-hat style forgings, which offer a superior quality product with a high yield strength throughout. 4130 Flanges can be provided with a stainless steel or inconel inlay to the ring groove for added protection against corrosion. A wide range of combinations of API size designations, pressure ratings and butt-weld end sizes are available.
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API size designations (inches)
1 13⁄16, 2 1⁄16, 2 9⁄16, 3 1⁄16, 4 1⁄16, 5 1⁄8
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Butt weld end sizes
2"NB-6"NB, other sizes available
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Max working pressures
5,000psi, 10,000psi, 15,000psi, 20,000psi
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Product specification level (PSL)
PSL 3 as standard
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Temperature ratings
L to U as standard (-46°C to 121°C) . Elevated temperature classes X (180°C) and Y (345°C) also available.
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Material classes
DD as standard, others available