Product related standards and technical requirements

This equipment is designed, manufactured, and inspected in accordance with NB/T47003.1-2009 "Steel Welded Atmospheric Pressure Vessels".

Gas shielded welding and submerged arc welding are used for welding, and the welding groove form is in accordance with GB985-2008

GB/T150-1998 Steel Pressure Vessels

GB/T4735-1997 "Steel Welded Atmospheric Pressure Vessels"

JB/T4709-2000 "Welding Code for Steel Pressure Vessels"

GB985-88 "Basic forms and dimensions of gas welding, manual welding, gas welding, and weld groove"

JB4730-94 "Non destructive Testing of Pressure Vessels"

Simultaneously refer to and cite relevant foreign standards:

Application of Japan Fire Safety Regulation No. 66 on Reinforced Fiberglass Double Layer Oil Tanks

UL58/UL1746 in the United States

1. Storage medium: diesel

2. Design pressure: atmospheric pressure

3. Design temperature: ≤ 50 ℃

4. Burial depth: relative elevation -0.75m

5. Full volume: 50 m3, filling coefficient 0.9

6. Corrosion allowance: 1mm

7. Material of oil storage tank: Q235-B

8. Cylinder size: 50 m3 tank inner layer, inner diameter 2800mm x length 9136mm x thickness 8mm

9. Outer layer of 50 m3 tank, inner diameter 2850mm x length 9162mm x thickness 6mm

10. Cylinder weight: 10952 kilograms

11. Equipment load: 200000 kilograms (non load bearing area)

12 weld coefficient 0.85

13. Welding process: Submerged arc welding is used for welding, with welding wire grade H08A

14. Pressure test: 0.1MPa

15. Weld seam testing requirements: JB/T4730.2 radiographic testing standard for butt welds, with a testing length of 10%; Inspection standard for fillet welds JB/T4730.

16. Manhole diameter: 2 DN500 manholes, manhole flanges are machined standard plate flat welded steel flanges, manhole neck height is 200mm, manhole cover and flange thickness is ≥ 22mm, oil resistant rubber asbestos flange pads are used, and bolts, nuts, and gaskets are configured according to national standards.

17. Takeover specifications: oil inlet with a diameter of 89 × 4mm, oil outlet with a diameter of 89 × 4 or 133 × 5mm, vent hole with a diameter of 57 × 3.5mm, oil measuring hole with a diameter of 108 × 4mm, liquid level gauge port with a diameter of 108 × 4mm, and manhole with a diameter of 500 × 6mm.

18. Oil storage tanks should be sandblasted for rust removal, with a rust removal grade of Sa2.5; Use reinforced epoxy coal tar paint for anti-corrosion, coating structure: asphalt primer - asphalt - glass cloth - asphalt - glass cloth - asphalt - glass cloth - asphalt - polyvinyl chloride industrial film (each layer thickness is about 1.5mm, total coating thickness is greater than or equal to 5.5mm), qualified for 3000 volt spark test. Alternatively, polyethylene cold wrapping tape can be used.

19. The storage tank should be welded with two conductive and grounded galvanized flat steel bars, with a specification of -40 × 4, and easy to connect with the electrostatic grounding grid.

20. The designed service life of the oil storage tank is 20 years.

21. Other technical requirements shall be implemented in accordance with current national and industry standards, as well as the "Gas Station Construction Standards" and "Gas Station Construction Standard Design".