Our Certifications
Internationally Recognized Quality Approvals
Our certifications demonstrate compliance with the most stringent international standards applicable to pressure equipment and marine-grade copper nickel components.
Sunflex Metalloy Pvt Ltd is a fully certified CuNi flange manufacturer holding international quality management, classification society, and regulatory approvals recognized by global oil & gas, marine, and offshore industries.
Our certifications demonstrate compliance with the most stringent international standards applicable to pressure equipment and marine-grade copper nickel components.
Every CuNi flange undergoes comprehensive multi-stage testing at our NABL accredited laboratory before dispatch.
XRF spectrometry to verify Cu, Ni, Fe, Mn chemical composition of every flange against ASTM B151. Results documented with heat number traceability.
Optical Emission Spectrometry full 8-element chemistry report on each production heat. Results compared to ASTM B151 CuNi 90/10 and CuNi 70/30 composition limits.
UTS, 0.2% proof strength, and elongation tested on coupons from each heat. Results verified against ASTM B151 minimum property requirements.
Shell hydrostatic test at 1.5× rated working pressure per ASME B16.5 / API 598 with minimum hold time and zero pressure drop acceptance criteria.
Straight and angle beam UT on all forgings for volumetric flaw detection before and after final CNC machining on critical flanges.
Liquid penetrant examination on all machined surfaces for surface-breaking defect detection. Colour contrast or fluorescent per project specification.
X-ray or Gamma (Ir-192) radiography for volumetric examination of critical flanges reviewed by ASNT Level II/III qualified interpreters.
Brinell and Vickers hardness on production coupons and finished flanges. RTJ groove hardness verified for correct ring gasket material compatibility.
100% dimensional verification per ASME B16.5 / B16.47 tolerance tables using calibrated instruments — bore, OD, bolt circle, thickness, face dimensions.
Contact us with your project certification requirements. We confirm applicable approvals and documentation package before order placement.