Flanges
Weld neck flanges
For high-pressure, high-temperature lines in oil & gas and desalination, machined and drilled to standard.
- ASME B16.5
- NPS ½″–24″
- Class 150–1500
- A105 / F316L
Flanges to ASME B16.5
Standard and non-standard flanges from ½″ up to 3 m in diameter, cut from plate or forgings, machined and drilled to standard.
Flanges
A reliable joint for every line
From low-pressure water lines to oil and gas service.
We make flanges in ASTM A105 carbon steel, A350 LF2 for low temperature, F304L and F316L stainless, and duplex for desalination. Large diameters are cut from thick plate by oxy-fuel or plasma, then turned and drilled to the standard’s bolt pattern.
Every flange is marked with size, class, material and heat number, and ships with a mill certificate and dimensional report.
- NPS ½″ – 24″ (ASME B16.5)
- NPS 26″ – 60″ (ASME B16.47 A/B)
- Class 150 – 1500
- RF, FF or RTJ facing
Products
Flange range
Standard, large-diameter and custom.
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Flanges
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Flanges
Slip-on, blind & lap-joint flanges
Raised, flat or RTJ face in carbon or stainless steel for water, cooling and process lines.
- RF / FF / RTJ
- Class 150–600
- A105 / A350 LF2 / F304L
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Flanges
Large & non-standard flanges
Large-diameter flanges to ASME B16.47 or to drawing, cut from thick plate and precision machined.
- ASME B16.47 A/B
- OD up to 3000 mm
- Up to 150 mm thick
Why choose us
Types we make
Choose by pressure and installation method.
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Weld neck (WN)
Butt-welded with gradual stress transfer — for high pressure and temperature.
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Slip-on (SO)
Easy to align and economical for water and medium-pressure lines.
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Blind (BL)
Closes line ends and vessel nozzles and can be reopened later.
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Lap joint (LJ)
With a welded stub end — for lines that are dismantled often.
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Socket weld (SW)
For small bores and high-pressure lines.
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Flanges to drawing
Rings and equipment flanges up to 3000 mm in diameter.
Quality
Standards we work to
Every shipment leaves the workshop with material certificates and inspection reports.
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ISO 9001:2015
A quality management system aligned with ISO 9001, covering engineering review, purchasing, fabrication and inspection.
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ASME B16.5
Flange dimensions and pressure classes from ½″ to 24″, with B16.47 for larger sizes.
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EN 10204 3.1
Mill inspection certificates that trace every plate and flange to its heat.
FAQ
Flange questions
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Standard, type, nominal size, class, facing, bore schedule for weld necks, material and quantity.
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Send your flange schedule
We reply with a detailed quote and delivery time within one working day.