... mm Material:Carbon steel or stainless steel Dishing ends for pressure vessel: Diameter:19mm-12000mmThickness:8mm-150mm Standard:AISI, ASTM, GB ... oil and gas industry, chemical plant, electric power, smelting water control.food machinery and ship building ,boiler heat exchanger,medical equipment ... . No cracks , delamination, inclusion ,and other defects Dishing ends for pressure vessel