PIPING• Refining & Petrochemical

P91 & Inconel 625 Furnace Revamp Piping Spools

High-alloy pre-fabricated piping spools with precision induction preheating and post-weld heat treatment.

Client: National Oil Corporation

Site: Vadodara, Gujarat

Date: Jun 2025

Project Overview & Execution Details

Critical high-temperature furnace revamping spools fabricated under rigorous metallurgical controls. Welded using GTAW root and hot passes with controlled interpass temperature monitoring and automated electric resistance PWHT.

Defined Scope of Work:

450 pipe spools ranging from 2 inch to 24 inch diameter, including RT, UT, PMI, and hardness testing.

Execution Milestones & QA Gates

Chronological project order tracking

2 / 4 Completed

Engineering Drawings & Material Procured

COMPLETED

Delivered on: 16 Oct 2026

Cutting, Fit-up & Root Pass Inspection

COMPLETED

Delivered on: 16 Oct 2026

Full Welding & NDT (Radiography / UT)

IN_PROGRESS

Blasting, Protective Coating & Final QA Handover

PENDING

Technical Specifications

Piping Material: ASTM A335 Grade P91 & Inconel 625
NDE Standard: 100% Radiography + 100% Hardness Testing
Preheat / PWHT: Induction heating 220°C / PWHT at 750°C

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