... like pharmacy, food industry, petroleum industry, heat exchange and decoration. We manufacture the welded ... % Nickel, 15--16% Chromium)304(approx 7.8-9% Nickel, 17-19% Chromium) ... Steel Seal and Label5) Applied field: Decoration, Heat-Exchanger, Condenser Tubes, Sanitation, food industry , Petroleum ... 400#, 600# , 800#, 180# Hairline, 240# Hairline.7) Tolerance: Outer Diameter: +/-0.2mm, thickness: +/-0. ...