1.1 This specification covers nickel (UNS N02200) and low carbon nickel (UNS N02201 and UNS N04400) in the form of welded and annealed or welded and stress relieved pipe intended for general corrosive service and for mechanical applic This specification covers UNS N02200 nickel alloy and UNS N02201 and N04400 low carbon nickel alloy welded pipes intended for general corrosive service and for mechanical applications. Each pipe should either be welded and annealed or welded and stress