Since 1981, Norris Cylinder Company has manufactured over 5,000,000 high-pressure cylinders at our plant in Longview, Texas. This represents over 30,000,000 cylinder life years of service. The quality of our cylinders has been time-tested, and we can state with pride that Norris has never had a high pressure cylinder failure in the field due to a defect in our workmanship. Norris Cylinder Company produces high pressure, seamless cylinders, widely used for shipping, storing, and dispensing industrial gases. Cylinders are fabricated from chromium-molybdenum steel and produced in strict compliance with all applicable DOT/TC or other specifications. Each cylinder is manufactured by the hot billet pierce method, which produces a seamless cylinder with the bottom integral to the sides.