Stainless Steel U-Bend Heat Exchanger Tube to TEMA/Drawing | Custom Geometry Shaanxi Shangyou Stainless Steel Co., Ltd. supplies stainless steel u-bend heat exchanger tube to tema/drawing | custom geometry for buyers whose primary search intent is custom U-tube bundles and replacement exchanger tubing, not generic stainless or nickel-alloy stock. The page should be quoted against the selected standard edition, the equipment or component drawing and the governing design code.