WPS Detail — Procedure record & validation findings

Qualified by PQR PQR-IBR-2026-105. Traceability established.

Base metal group P-No. 1 Gr.2 — SA-516 Gr.70 (IBR Form IV-A).

Joint is between identical P-Numbers — no dissimilar-metal restrictions apply.

Range 50–100 mm within qualified 1.5–100 mm for 50 mm test coupon.

Commercial range 50–100 mm is within conventional procedure limits.

Small-bore root check applicable to piping only.

Preheat ≥ 150°C satisfies the 65°C minimum for P-No. 1 base metal.

Interpass 280°C within 315°C ceiling.

Thermal window 150–280°C is internally coherent.

PWHT not required — cycle parameters not applicable.

PWHT not required — soak band check not applicable.

F-No. 6 (EM12K + F7A4-EM12K flux) is consistent with SAW.

A-No. 1 weld deposit is chemically matched to P-No. 1.

SAW is flux-shielded; external shielding correctly marked N/A.

SAW — backing gas not driven by process.

Flux process — flow rate not applicable.

DCEP polarity consistent with SAW and EM12K + F7A4-EM12K flux.

Amperage 550–750 A inside the SAW operating envelope.

Voltage 28–34 V inside the SAW operating envelope.

Travel speed 400–550 mm/min is plausible for SAW.

Computed worst-case heat input ≈ 3.83 kJ/mm (declared ceiling 4 kJ/mm) — no toughness restriction invoked.

Position 1G is a recognised EN ISO 6947 / QW-461 designation.

Transfer-mode variable applies to GMAW only (SAW exempt).

SAW is an admissible process under IBR.

Impact regime not invoked for the declared thickness/application.

Tank-specific routing not applicable.

Prepared by Er. S. Venkataraman; welder must hold a valid IBR welder's certificate and records are subject to Inspecting Authority countersignature (Reg. 277–283).

Administrative header fields adequately populated for issue.

Group-No. split applies only when notch toughness is specified.