4.6　Oil Tank

4.6.1　The installation of oil tank shall comply with the following requirements:

1　The longitudinal and horizontal center lines shall be adjusted，and the measurement by plumb wire should be carried out，with the allowable deviation of 10.0mm.

2　The elevation shall be adjusted，and the measurement by optical instrument or ruler should be carried out，with the allowable deviation of±10.0mm.

3　The levelness or verticality shall be adjusted，and the measurement by leveler or suspension wire should be carried out，with the allowable deviation of 1.5/1000.

4.6.2　The oil tank shall be cleaned up so as to be free of any visible pollutants inside.After being determined as qualified upon checking，it shall be timely sealed.

4.6.3　The pressure test shall be carried out to the cooler and steam heater of the oil tank according to the requirement of 4.7.2 of the Code.