Introduction
Butt-weld pipe fittings are integral to high-pressure piping systems in oil & gas, petrochemical, and power generation industries. As a procurement engineer, your specification choices directly affect field reliability. Common failures—leakage, corrosion, deformation, and welding cracks—often trace back to decisions made during sourcing. This guide helps you embed quality into your RFQ and inspection process.
Common Failures and Their Root Causes
1. Leakage
Leakage typically results from poor weld quality, incorrect material, or excessive pressure. From a procurement standpoint, the root cause can be a mismatch between the fitting’s wall thickness and the pipe schedule, or using fittings without proper heat lot traceability.
2. Corrosion
Corrosion attacks fittings when the material grade lacks sufficient resistance to the process fluid. For example, specifying A106 instead of 316L in a sour service environment. Impurities in the raw material (non-metallic inclusions) also accelerate corrosion.
