This standard specifies the pressure test requirements for ship power piping and ship system piping. This standard applies to ship power piping and ship system piping. CB/T 3616-1994 Pipeline pressure test requirements CB/T3616-1994 Standard download decompression password: www.bzxz.net

Shipbuilding Industry Standard of the People's Republic of China
CB/T3616-94
Requirements for Pipeline Pressure Test
Published on April 11, 1994
Published by China State Shipbuilding Corporation
Implementation on October 1, 1994
Shipbuilding Industry Standard of the People's Republic of China
Requirements for Pipeline Pressure Test
1 Subject Content and Scope of Application
This standard specifies the pressure test requirements for ship power piping and ship system piping. This standard applies to ship power piping and ship system piping. 2 Test Quality Requirements
2.1 The pressure gauge used for the pressure test shall be calibrated and qualified and within the effective period of use. CB/T3616—94
Classification number: U50
2.2 The strength test of the pipe shall be carried out in the workshop after processing; the tightness test of the pipeline shall be carried out after installation on board. Leakage inspection shall be carried out on each flange and pipe joint. There shall be no leakage. During the tightness test, the pipeline shall be separated from the machinery or equipment. 2.3 All pipes for Class 1 and Class I piping systems, as well as steam pipes, water pipes, compressed air pipes and fuel pipes with a design pressure greater than 0.35MPa shall be subjected to hydraulic strength test after manufacturing and before being wrapped with insulation materials or coated. 2.4 When Class I and Class 1 piping systems are connected by butt welding during installation on board, a hydraulic test shall be carried out after welding in accordance with the provisions of the table; if the entire circumference of the butt weld is inspected by ultrasonic or radiographic inspection and the quality is good, the hydraulic test may be exempted. 2.5 The compressed air pipeline should be tested for air tightness under working pressure. The test time of the air pipeline (without air bottle) shall not be less than 10 minutes, and the pressure drop shall not be greater than 1%; the test time of the air pipeline and the air bottle together shall not be less than 2 hours, and the pressure shall not drop significantly. 2.6 After the pipeline pressure test, the water in the pipe shall be drained and blown dry with compressed air. 2.7 Grade 1 and Grade Ⅱ pipelines and pipelines that need to be inspected by ship inspection shall be stamped with a qualified steel stamp after passing the strength test. 2.8 Records should be kept during the hydraulic strength test and tightness test. Pressure test requirements
The hydraulic strength test and tightness test of the pipeline (excluding the suction pipeline) shall be carried out in accordance with the provisions of the following table. Pipeline test pressure
Hydraulic strength test
Fuel pipeline
Lubricating oil pipeline
Fresh water and seawater pipeline
Compressed air pipeline
Steam pipeline
300℃
≥300℃
Pressure (in workshop)
China State Shipbuilding Corporation 1994-04-11 approved test medium
Oil or water
Tightness test pressure
(after loading on board)
Test medium
1994-10-01 implemented
Hydraulic oil
Boiler feed water
Boiler discharge
Boiler pressure Fuel oil pipeline
Oil tank heating pipeline
Bilge water and ballast water pipeline
Deck drainage pipeline
Sewage drain pipeline
Air pipeline
Domestic water pipeline
Condensate pipeline
Water fire extinguishing pipeline
Automatic water sprinkler fire extinguishing pipeline
Bottle head valve to distribution
Carbon nitride
Distribution valve pipeline
Automatic distribution valve to
Spray head pipeline
Halon fire extinguishing pipeline
Foam fire extinguishing pipeline
Inert gas pipeline
Note: -
3.2 Others
Pipeline design pressure.
CB/T3616-94
Hydraulic strength testbzxZ.net
Pressure (in the workshop)
1.5p, but not less than 0.4
Test medium
Oil or water
Tightness test pressure
(after loading on board)
1.25p, but need not||exceed p+0.7
1.0p, but not more than 1.6
1.5p, but not less than 0.4
Test medium
and the hull structure tightness test
test together
, can be exempted
The hydraulic strength test in the workshop and the tightness test after loading on board of various pump suction pipelines are both 0.4MPa; the test medium is water. 3.2.14
After loading, if the local pipe section cannot be tested for tightness, the tightness requirements during actual use should be guaranteed. Additional remarks:
This standard is proposed by China State Shipbuilding Corporation. CB/T361694
This standard is under the jurisdiction of the 603rd Institute of China State Shipbuilding Corporation. This standard was drafted by Qiuxin Shipyard. ★The main drafters of the standard are Dai Weidong and Pan Xueying. 3
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