This Standard specifies product classification, requirements, test methods, test rules, marking, packaging, transport and storage of single grade and single inspiration marine centrifugal fan (hereinafter referred to as "fan").
This Standard is applicable to design, production, test and acceptance of fan for ventilation.
2 Normative References
The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest editions of the normative references apply.
GB/T 191 Packaging -pictorial marking for handling of goods(GB/T 191-2000, eqv ISO 780:1997)
GB/T 1236 Industrial fans-performance testing using standardized airways (GB/T 1236-2000, idt ISO 5801:1997)
GB/T 1804-2000 General Tolerances－tolerances for linear and angular dimensions without individual tolerance indications(eqv ISO 2768-1:1989)
GB/T 2888 Methods of noise measurement for fans blowers compressors and roots blowers
GB/T 3235 Basic types sizes parameters and characteristics curve of fans
GB 8923-1988 Rust grades and preparation grades of steel surfaces before application of paints and related products (eqv ISO 8501-1:1988)
GB/T 9438 Aluminum alloy casting
GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 16301-2008 Measurement and evaluation of vibration severity for marine engine-room auxiliaries
CB 1146.1-1996 Environment test and engineering guideline for vessel equipment - general
CB 1146.6-1996 Environment test and engineering guideline for vessel equipment - impact
CB 1146.8-1996 Environment test and engineering guideline for vessel equipment - incline and sway
CB 1146.9-1996 Environment test and engineering guideline for vessel equipment - vibration
JB/T 6445 Over speed test of fan impeller
JB/T 6886 Technical specification for draught fan application
JB/T 9101 Fan rotor balance
JB/T 10214 Specifications of riveting and welding part for fans
3 Terms and Definitions
3.1 Rated condition
The peak point for theoretical design efficiency of fan work is the rated conditions of fan, i.e. the operating point determined by rated point pressure and rated point flow capacity.
3.2 Standard condition of inspiration
It refers to the condition with an atmospheric pressure of 101 325 Pa, a temperature of 20℃, a relative humidity of 50 % and an air density of 1.2 kg/m3.
3.3 Standard condition of flux
It refers to the air volume with actual flow of fan converted into standard condition of inspiration.
