Harvest products conform to ASTM and ASME standards.The pipe fittings could be made according to different types of standards,including 3A,BPE,SMS,ISO based on buyers’ requests.304/304L grade is the standard, but 316/316L is available upon request.Material test reports will be furnished upon request at the time of order.All welding is done with cryogenic source inert gas welding methods. Harvest uses ASME qualified welders and ASME procedures designed to provide the best possible welds. Automatic or semi-automatic positioning fixtures are used on tubing and fittings. Interior surfaces are smooth, even and uniform.Standard finish for fittings is Mill Finish; other finishes available upon request.