General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB 5135.21-2011
Scope
This part of GB 5135 specifies the terms and definitions, classification, model establishment, requirements, test methods, inspection rules, signs, instructions for use and packaging, transportation and storage of terminal water testing devices for sprinkler systems. This section applies to the terminal water test device used in the automatic sprinkler system.
GB 5135.21-2011 Referenced Document
GB 5135.11 Automatic sprinkler system.Part 11:Grooved couplings and fittings
GB/T 1226 General pressure gauge*, 2017-12-29 Update
GB/T 191 Packaging.Pictorial marking for handling of goods
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads Part 1:Parallel internal and taper external threads
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads Part 2:Taper internal and external threads
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB 5135.21-2011 history
2011GB 5135.21-2011 Automatic sprinkler system.Part 21: Inspector's test connection