News & Insights
Company news and practical notes on specifying pressure vessels, tanks and steel structures.
Qualification for installing and servicing explosion-proof equipment
Jiangxi Wanlong Industrial Co., Ltd. has received a qualification for the installation, maintenance and repair of explosion-proof equipment. Certificate PCEC-2024-BC004 covers two equipment categories: explosion-proof vapour-recovery units and explosion-proof instruments. It is valid from May 2024 to May 2027. Why this qualification matters Fuel stations and refuelling skids work in hazardous areas, where fuel vapour can form an explosive atmosphere. Electrical equipment in these areas must be explosion-protected, and it must be installed and serviced correctly to keep that protection. Our skid-mounted refuelling units carry this kind of equipment. The JY-10, JY-20 and JY-30 units for petrol and diesel use dispensers rated Ex d IIA T4. The JYQ-20 unit for CNG and LNG is rated Ex d IIB T3. The configuration includes: SF double-wall tank Vapour recovery unit Explosion-proof dispenser Submersible pump Level gauge Emergency shut-off valve Fire-fighting equipment Intelligent control system What the certificate covers, and what it does not Covered: installation, maintenance and repair of explosion-proof vapour-recovery units and explosion-proof instruments. Not covered: other categories of explosion-proof equipment. The certificate is a service qualification, not a product certificate for any device. When you specify a refuelling skid, state the hazardous-area classification and the explosion-protection marking your authority requires. They can then be checked against the equipment list before fabrication. In these markings, Ex d means a flameproof enclosure, IIA and IIB are gas groups, and T4 and T3 are temperature classes. The marking must suit the gases present and the area classification at the site. How it fits with our other work The same equipment sits on SF double-wall underground tanks at fuel stations, which we also fabricate. Our SF range runs from SF-10 to SF-50, 10 to 50 m³, with a 6 mm Q235B inner tank and a 6 mm FRP outer tank, manufactured to SH/T 3178. Our UL 1746 certificate is 20161115-MH61687, for jacketed underground tanks for flammable liquids, issued 2016. Skid piping falls under our special equipment production licence TS3836019-2027 for GC2 industrial piping installation, valid to 2027-04-14. Skid frames are welded to qualified WPS/PQR, blasted to Sa 2.5 and coated with epoxy zinc-rich primer and polyurethane topcoat.
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.
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- Sales contact
- Mr. Yu Jiakang
- WhatsApp / WeChat
- +86 183 1791 9067
- Factory
- No. 2666 Jinxian Avenue, High-tech Industrial Park, Jinxian Economic Development Zone, Nanchang, Jiangxi, China 331700
Pressure vessels, storage tanks, SF double-wall tanks, steel structures and skid-mounted units, fabricated in Jinxian, Jiangxi since 2003.
Jiangxi Wanlong Industrial Co., Ltd.
No. 2666 Jinxian Avenue, High-tech Industrial Park, Jinxian Economic Development Zone, Nanchang, Jiangxi, China 331700
Contact
- Mr. Yu Jiakang
- WhatsApp +86 183 1791 9067
- jiakang@wanlongindustrial.com
