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Industry Focus
Pressure Vessel & Boiler Fabrication
Weld qualification. Impact testing. Hardness traverses. Full PQR support.
How QML Serves This Industry
Pressure vessel and boiler fabricators must qualify their welding procedures and welders in accordance with ASME, IS, or EN codes before production commences. QML provides all the mechanical and metallurgical tests required to complete a Procedure Qualification Record (PQR) — tensile, bend, impact, hardness traverse, and macro examination — as a recognised independent laboratory.
Testing Scope for Pressure Vessel & Boiler Fabrication
Every testing requirement matched to what QML does and the applicable standard.
| Testing Requirement | What We Do | Standard |
|---|---|---|
| Weld procedure qualification (PQR) tensile | All-weld metal tensile — UTS, yield, elongation; transverse weld tensile | ASME IX / IS 7307 / ISO 15614-1 |
| Guided bend test (face, root, side) | Bend specimens from weld coupon — ductility and soundness assessment | ASME IX / IS 7307 |
| Charpy V-notch impact testing | Impact energy (J) at ambient or sub-ambient temperature — 3-specimen set | IS 1757 / ASTM E23 / EN ISO 148-1 |
| Hardness traverse of weld, HAZ & base metal | Vickers HV10 across cross-section — max 350 HV PWHT limit verification | BS EN ISO 9015-1 / NACE MR0175 |
| Macro examination of weld cross-section | Etched macro — penetration, fusion, profile, absence of visible defects | ISO 17639 / IS 7307 |
| Micro examination of weld zones | Optical microscopy — HAZ grain coarsening, phase, inclusion distribution | ISO 17639 |
| Base metal chemical & mechanical verification | OES for material grade confirmation; tensile for base metal MDMT compliance | ASTM A370 / IS 1608-1 |
Materials Handled
SA 516 Gr.60/70 pressure vessel plate
IS 2002 boiler quality plate
SA 106 seamless carbon steel pipe
Stainless steel (304L, 316L, 321 — ASME SA 240)
Duplex stainless steel (2205)
P91 / P22 alloy steel (Cr-Mo) for high-temp service
Need testing for Pressure Vessel & Boiler Fabrication?
Submit your enquiry and our team will confirm scope, turnaround, and pricing — usually within the same working day.