Framework supply of SF double-wall tanks for station networks in Hunan and Henan

Jiangxi Wanlong Industrial Co., Ltd. supplies SF double-wall underground fuel tanks under framework purchase agreements with a national fuel retailer's provincial branches in Hunan and Henan. The tanks go to the retailer's fuel stations in the two provinces.

Scope of supply

• Fabrication of SF double-wall tanks at our plant in Jinxian, Nanchang, Jiangxi
• Manufacture to SH/T 3178, with a Q235B steel inner tank, an FRP outer tank and an interstitial space for leak detection
• Inspection and documents for each tank
• Delivery by road to station sites
• Site installation support on station projects where it is part of the order

The tanks

The SF range covers five standard sizes:

• SF-10: 10 m³, inside diameter 2,400 mm, overall length 3,600 mm
• SF-20: 20 m³, inside diameter 2,400 mm, overall length 6,000 mm
• SF-30: 30 m³, inside diameter 2,600 mm, overall length 7,200 mm
• SF-40: 40 m³, inside diameter 2,800 mm, overall length 8,500 mm
• SF-50: 50 m³, inside diameter 2,800 mm, overall length 9,800 mm

The interstitial space between the two walls is monitored at the station, so a breach in either wall is detected while the other wall still contains the fuel.

All sizes use a 6 mm Q235B inner tank and a 6 mm FRP outer tank. Our UL 1746 certificate is 20161115-MH61687, for jacketed underground tanks for flammable liquids, issued 2016.

How the tanks are built

• Q235B plate checked against mill test reports, then CNC cut and rolled
• Inner-tank seams welded by submerged-arc welding to qualified WPS/PQR
• Weld NDT and air-tightness testing of the steel inner tank
• FRP outer tank built up on our FRP spray lines
• Finished tanks loaded with overhead cranes up to 50 t
• Each tank shipped with its certificate of conformity, quality certificate, MTRs, NDT and test reports, and packing list

A wider supply record

The same retailer's branches in Jiangxi, Hubei, Guangdong, Zhejiang, Fujian and Guangxi are also on our SF tank reference list. On some station projects we supply the canopy steel as well as the tanks, so the structure above ground and the tanks below it come from one plant.

Station operators and EPC contractors outside China can order from the same SF-10 to SF-50 range. Send the station layout and the standard your authority requires.