A question about the security section
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Recently I have been working on a special article on safety, and one issue that came up is that the client uses natural gas to burn waste ammonia gas. The evaluation agency classified this device as Category C, based on the fact that boiler rooms are also defined using natural gas for combustion. I have some doubts regarding this; could someone provide a more detailed explanation? Or tell me what category this device should be classified under, and which standards apply? Thank you
This post was last edited by nanbo888 on 2011-2-17 at 19:45. The original poster made a mistake; the fire hazard of ammonia is classified as Category B. Liquid ammonia should be classified as Category B, Subcategory 2, for the following reasons:
I. Guidelines cited:
1. “Classification and Labeling of Common Hazardous Chemicals” GB13690-92
2. “Code for Fire Protection Design of Buildings” GB50016-2006
II. Detailed explanation:
(1) Excerpt from the explanatory notes of “Code for Fire Protection Design of Buildings” (GB50016-2006), section 3.1.3, which explains how the fire hazard of stored materials is determined:
1. Flash point ≤ 128°C
I. Guidelines cited:
1. “Classification and Labeling of Common Hazardous Chemicals” GB13690-92
2. “Code for Fire Protection Design of Buildings” GB50016-2006
II. Detailed explanation:
(1) Excerpt from the explanatory notes of “Code for Fire Protection Design of Buildings” (GB50016-2006), section 3.1.3, which explains how the fire hazard of stored materials is determined:
1. Flash point ≤ 128°C
I know that the fire classification for ammonia is Class B, while that for natural gas is Class A. The key point is that the evaluation agency has classified this device as belonging to the boiler room category, thus assigning it to Class C. What I want to ask is whether this classification is appropriate; according to the classification system, if the concentration of natural gas is greater than 1 L/m3, it should be classified as Class A, otherwise it falls under Class B.
The last edit to this post was made by nanbo888 on 2011-2-17 at 21:43. Code for Design of Boiler Rooms GB50041-2008: 17.O.1 The fire protection design of boiler rooms shall comply with the relevant provisions of the current standards “Code for Fire Protection Design of Buildings” GB50016 and “Code for Fire Protection Design of High-Rise Civil Buildings” GB50045. How can Class A and Class B materials used in the facility end up in a Class C structure? Boiler rooms should be built to fire resistance ratings of Class 1 or Class 2; however, boiler rooms with coal-fired boilers whose total evaporation rate is no more than 4 tons per hour can use structures with a fire resistance rating of Class 3. I personally think it is incorrect; for reference only
The fire hazard in the boiler room should be classified as Class D. For details, see Article 3.1.1 of the Building Code and its explanatory provisions.