IS 9964 : Part 1 : 1981 Recommendations for maintenance and operation of petroleum storage tanks Part 1 Preparation of tanks for safe entry and work

1 Scope

1.1 This standard (Part I) covers the preparatory work whichshall be accomplished and the inspection and tests which shall becarried out to ensure-that a petroleum storage taak has beenproperly gas-freed and is safe for opening, entry and carrying outnecessary cleaning and other repair work. This standard also coversthe methods and procedures for cleaning dismantling and disposal ofdiscarded tanks.

1.1.1 This standard emphasises the necessity for thoroughremoval of harmful liquids, sediments and deposits and for freeingthe tanks of flammable and inflammable toxic gases and preventingtheir re-entry in the tanks.

1.1.2 Only atmospheric storage tanks are considered in thisstandard

2 Reference

IS 803 : 1976 Code of practice for design,fabrication and erection ofvertical mild steel cylindrical welded oil storage tanks