Over 50 years of excellence, Johnson Tube offers an array of ASTM/ASME spec precision welded Stainless Steel & Duplex Stainless Steel tubing & pipe for such uses as aircraft, food & beverage, boiler, condenser, heat exchanger, mechanical, pressure & filter tubes. Solid or perforated from ½” to 4” O.D. & up to 40 ft. Nickel alloy & Titanium, metric sizes, cut-to-length & deburring options.