Section 215.25  Basic Rules

This Section applies to all Sections of this Part unless otherwise noted.

a)         These provisions shall not be construed as prohibiting the continued use or reinstallation of containers constructed and maintained in accordance with the 1949, 1950, 1952, 1956, 1959, 1965, 1968, 1971, 1974, 1977, 1980, 1983, 1986, 1989, 1992, 1995 and 1998 editions of the ASME Code or any revisions thereof in effect at the time of fabrication.

b)         Requirements for new construction and original test, repair, and alterations of containers (including USDOT portable tanks), other than refrigerated storage tanks must comply with the following:

1)         Containers used with systems covered in Sections 215.85, 215.110, and 215.115 shall be made of steel or other material compatible with ammonia and tested in accordance with the current ASME Code.  An exception to the ASME Code requirements is that construction under Table UW 12 at a basic joint efficiency of under 80% is not authorized.

2)         Containers designed and constructed in accordance with the ASME Code, other than refrigerated storage containers, shall comply with the following additional requirements:

A)        The entire container shall be postweld heat treated after completion of all welds to the shells and heads.  The method employed shall be as prescribed in the ASME Code, except that the provisions for extended time at a lower temperature for postweld heat treatment shall not be permitted.  Welded attachments to pads may be made after postweld heat treatment.  Exception: implements of husbandry will not require postweld heat treatment if they are fabricated with hot-formed heads or with cold-formed heads that have been stress relieved.

B)        Steels used in fabricating pressure containing parts of a container shall not exceed a specified tensile strength of 70,000 psi.  Exception: implements of husbandry may be fabricated from steel having a specified tensile strength of 75,000 psi.

C)        Containers shall be inspected by a person who holds a valid National Board Commission.  Exception: refrigerated storage tanks with a design pressure of 15 psig or less and containers covered in Section 215.90.

D)        Repair or alteration of pressure-containing parts of a container shall be performed in compliance with the applicable provisions of the current edition of the National Board Inspection Code.  Where specific procedures are not given, it is intended that, subject to acceptance of the inspector, all repair or alteration shall conform as much as possible to the ASME Code section and edition to which the container was constructed.

(Source:  Amended at 27 Ill. Reg. 9922, effective July 1, 2003)