Answer: 1. The manufacture, inspection and acceptance of the lower distillation column comply with the provisions of JB/T2549-1994 "aluminum air separation equipment manufacturing technical specification" and JB/T4734-2002 "Aluminum Welding container.
2. the welding joints of Class A and B of containers should be tested 100% Ray to meet the second level requirements of JB/t4730-2005 non-destructive testing of pressure equipment; the welding joints of class C and D and those that cannot be detected by Ray should be 100% penetrated to meet the level I requirements of JB/t4730-2005.
3. after the container is manufactured and compounded with the main cold, use dry and clean air or nitrogen to 0. 69MPa conduct the barometric test on the surface pressure, keep the pressure for 30 min, and there should be no obvious deformation or leakage, and then reduce it to 0. 6MPa conduct the air tightness test under the pressure gauge, and keep the pressure Zh from leaking.
4. Test procedures refer to pressure vessel safety technology supervision regulations.
5. All parts must be oiled before assembly or after repair, and the cleanliness should meet the relevant requirements of JB/T 6869-1993 air separation equipment surface cleanliness.
6. The distance between the weld line of the tube and the plane of the tower plate is 90mm, and the strengthening nut should be riveted tightly after tightening to prevent loosening.
