Flange Facing & In-Situ Machining
Products
Flange Facing & In-Situ Machining
Flange facing and in-situ machining are precision maintenance processes used to restore the sealing surfaces of flanges, valves, heat exchangers, and pressure vessels to their original specifications without dismantling or transporting equipment. These services are essential for achieving leak-free joint integrity and extending the lifespan of critical components in oil, gas, petrochemical, and power industries.
Metalok Industries provides on-site flange facing, milling, drilling, and line boring services using portable, high-precision machining tools. Our experienced technicians can machine flanges ranging from 2 inches to over 5 meters in diameter, ensuring perfect flatness, surface finish, and gasket compatibility.
All in-situ machining activities are carried out in compliance with ASME, API, and ANSI standards, using laser alignment and surface measurement systems to achieve micron-level accuracy. Metalok ensures minimal downtime, reduced dismantling costs, and restored sealing performance, even in confined or hazardous environments.
- Inspect flange surfaces for warping, pitting, corrosion, or damage.
- Determine machining depth and required surface finish as per standard.
- Set up portable flange facing or milling machines on-site.
- Ensure precise centering, alignment, and clamping before machining.
- Perform controlled cutting to restore accurate flatness and surface smoothness.
- Re-machine serrated or spiral grooves for gasket seating where required.
- Carry out bolt-hole drilling, thread repair, or spot facing as needed.
- Verify flange surface finish using precision measuring instruments.
- Clean, inspect, and prepare the machined surface for assembly.
- Record measurements, tolerances, and surface finish data for QA documentation.