Welding of ASTM A268 steel pipes

This specification covers many grades of nominal wall thickness stainless steel pipes for general corrosion resistance and high temperature services. Most of these grades are commonly referred to as the "straight chromium" type, which is characterized by ferromagnetism. Two of the grades TP410 and UNS S 41500 (Table 1) are suitable for hardening through heat treatment, while high chromium ferritic alloys are sensitive to notch brittleness when slowly cooled to room temperature. When using these materials, these characteristics should be recognized. The TP439 brand is mainly used for hot water tank services and does not require post weld heat treatment to prevent erosion of the heat affected zone Slotted Pipe, Casing, Tubing 1. Materials and Manufacture 1.1 The pipes shall be made from stainless steel material conforming to the chemical composition requ…