Steel Pipe & Tube Guide

Compare hot-dip-after-fabrication and pre-galvanized steel pipe by coating sequence, seam and cut-edge treatment, fabrication, specification and inspection evidence.

Learn what steel pipe schedule means, how SCH 40 and SCH 80 relate to wall thickness, OD and ID, and how to verify requirements in standards, RFQs, POs and MTCs.

Compare ASTM A53 and ASTM A106 steel pipe by scope, manufacturing type, grades, service context and purchase-order requirements. Learn what buyers should verify in the current standard, PO and MTC.

Compare seamless and ERW carbon steel pipe manufacturing, pressure and mechanical service factors, weld-seam inspection, availability and RFQ requirements.

Learn how steel pipe and steel tube use different size language, tolerances and RFQ terms, including NPS, DN, outside dimension, schedule and wall thickness.