Questions regarding the Building Code
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(2) Article 4.2.1: The fire separation distances between Class A, B, and C liquid storage tanks (areas), barrel storage areas for Class B and C liquids, and buildings shall not be less than those specified in Table 4.2.1. A, Note 3... The fire separation distance from open flames or areas where sparks are generated shall be increased by 25% in accordance with the provisions for buildings of Class IV fire resistance as specified in this table ； Is the boiler in the boiler room considered as a source of open flame? That is, how should the distance between Class A, B, and C liquid storage tanks (areas) and the boiler room be determined? B, Note 3: For fixed-roof storage tank areas for liquids of categories A, B, and C, semi-outdoor storage areas, and barrel storage areas for liquids of categories B and C, the fire separation distances from category A factories (warehouses) and civil buildings shall be increased by 25% in accordance with the provisions of this table. Question: Is there any difference between fixed-roof tanks and horizontal storage tanks? Are horizontal storage tank areas for Class A, B, and C liquids also subject to this regulation? C. Table 4.2.1 does not specify requirements for situations where the total volume of Class A and Class B tank areas exceeds 5000 m3; in such cases, how should the distance between these tank areas and buildings be determined? The Petroleum Industry Regulations address situations with a volume greater than 5000 m3, so why are no such provisions included in the Building Codes? Last edited by Striving for victory in solitude on 2009-4-11 at 16:55.]
The boiler room is considered as an open-flame device; it does not refer to indoor boilers, but rather to chimneys. The distance between Class A, B, and C liquid storage tanks (areas) and the boiler room is determined by taking the distance specified in the table and increasing it by 25%. There is a difference between fixed-roof tanks and floating-roof tanks, but no difference with horizontal storage tanks. Horizontal storage tank areas for Class A, B, and C liquids shall be governed by this provision. The situation in Table 4.2.1 where the total volume of Class A and Class B tank areas exceeds 5000 m3 is not specified; this can be understood as follows: when the total volume of a tank area exceeds 5000 cubic meters, the Building Code is no longer applicable, and you should refer to the Petrochemical Code or other relevant standards for design purposes.