Storage Tanks Bendel fabricates custom aboveground storage tanks up to 50,000 gallons in Carbon & Stainless Steel, Nickel alloys and Aluminum. We serve the Chemical, Petrochemical, Textile, Paint, Wastewater and Pharmaceutical markets to name a few. Click here to see a partial list of companies served. The vast majority of storage tanks fabricated by Bendel are designed to UL 142, API 650/ 620 or ASME specifications. UL 142 UL is the minimum design standard utilized by Bendel . It is best known in the petroleum industry for the storage of motor fuel (flammable and combustible liquids). The UL 142 standard was developed for and by state fire marshals for shop built tanks and employs good engineering practices through the use of defined minimum design standards and unannounced inspections by UL inspectors. The UL standard does not require a formal welding procedure program but bases its quality program on the final tank leak testing. UL 142 listing is limited to aboveground horizontal and vertical tanks with a product specific gravity less than or equal to 1 and pressures not greater than atmospheric. API 650/620 This specification is also a petroleum industry code but was developed from the field erected tank perspective. However, both 650 and 620 incorporate shop-fabrication procedures. API minimum design thicknesses are heavier than UL, allow high product specific gravities and utilize a formal welding procedure program borrowed from ASME. Quality control and final testing/ inspection is the responsibility of the fabricator with no independent third party inspection. ASME (Section VIII Division I) This standard is best known for the fabrication of pressure vessels but can be used for atmospheric and vacuum vessels as well. The ASME code requires each fabricator to develop a comprehensive Quality Control program designed around the individual minimum guidelines of ASME and the fabricator's internal procedures. The Q.C. program is reviewed annually by an independent third party inspection agency and every three years by the National Board. Each vessel design is reviewed by an authorized third party inspector and must be approved prior to beginning construction. ASME also requires a formal welding procedure for all types of welding employed during fabrication. Depending on the level of welding efficiency utilized, non-destructive welding examination (i.e. radiography, ultrasonic, liquid penetrant or magnetic particle inspection) may be required. During final testing, the independent third party inspector reviews all material reports and tests conducted to insure compliance with the code. The ASME code provides the greatest degree of design flexibility but with the highest inspection costs. For further information about your specific needs, please contact us at: Sales@Bendelcorp.com