... as for difference working condition for the each valve pipe fitting,, so we have to redesign the products ... SR Elbows, 180 Deg. LR ElbowMaterial: carbon steel, alloy steel, stainless steelStainless steel include:ASTM/ASME A403 WP 304-304L-304H- ... countries and areas, such as Russia, Brazil, Iran, Spain,Egypt, Singapore, Israel, Portugal, Malaysia, Pakistan, Argentina, etc. stainless steel pipe elbow