How to test the pressure resistance of SSAW pipe

When testing the pressure of the spiral steel pipe hydraulic testing machine for water supply, the two ends of the tested steel pipe are first sealed by the end sealing device and low-pressure water is injected. During the water injection process, the air in the pipe is discharged through the exhaust valve. After the low-pressure water is filled, , inject high-pressure water into the pipe through a booster device to pressurize it until it reaches the specified test pressure. After reaching the specified test pressure, maintain the pressure for the specified time. If the large-diameter spiral steel pipe does not leak or deform during the pressure test, the pressure will be relieved. Then open the end sealing device, discharge the low-pressure water, and send the tested large-diameter spiral steel pipe to the inspection table for visual inspection for suspicious penetration.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When the spiral steel pipe hydraulic testing machine performs a pressure test, it first seals both ends of the steel pipe under test through the end sealing device and injects low-pressure water. During the water injection process, the air in the pipe is discharged through the exhaust valve. After the low-pressure water is filled, The pressurizing device injects high-pressure water into the pipe to pressurize it until it reaches the specified test pressure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

After reaching the specified test pressure, maintain the pressure for the specified time. If the spiral steel pipe does not leak or deform during the pressure test, the pressure will be relieved. Then open the end sealing device, discharge the low-pressure water, and send the tested spiral pipe to the inspection table for visual inspection for suspicious penetration. According to standard requirements, the pressure change curve during the pressure test process is recorded using an automatic recording device.

Spiral steel pipe hydraulic test standards:

O.D. mm	Wall Thicknessmm	Hydrostatic test pressure unit：MPa 1MPa equivalent to approximately 10 kilograms
		SY/T5037-2000		GB/T9711.1-1997
		Q235B	16Mn	Q235B	L360
219	6/7/8	7.7/9.0/10.3	11.3/13.2/15.1	10.9/12.8/14.6	14.8/17.3/19.7
273	6/7/8	6.2/7.2/8.3	9.1/10.6/12.1	8.8/10.2/11.7	13.5/15.7/17.9
325	6/7/8	5.2/6.1/6.9	7.6/8.9/10.2	7.4/8.6/9.5	11.3/13.2/15.1
377	6/7/8/9	4.5/5.2/6.0/6.7	6.6/7.7/8.8/9.9	6.4/7.4/8.5/9.5	9.7/11.4/13.0/14.6
426	6/7/8/9/10	4.0/4.6/5.3/6.0/6.6	5.8/6.8/7.8/8.7/9.7	5.6/6.6/7.5/8.4/9.4	8.6/10.1/11.5/12.9/14.4
478	6/7/8/9/10	3.5/4.1/4.7/5.3/5.9	5.2/6.1/6.9/7.8/8.7	0.0/5.9/6.7/7.5/8.4	7.7/9.0/10.2/11.5/12.8
529	6/7/8/9/10	3.2/3.7/4.3/4.8/5.3	4.7/5.5/6.3/7.0/7.8	0.0/5.3/6.0/6.8/7.6	7.3/8.6/9.8/11.0/12.2
630	6/7/8/9/10	2.7/3.1/3.6/4.0/4.5	3.9/4.6/5.3/5.9/6.6	0.0/4.4/5.1/5.7/6.3	6.2/7.2/8.2/9.3/10.3
720	6/7/8/9/10	2.4/2.7/3.1/3.5/3.9	3.5/4.0/4.6/5.2/5.8	0.0/3.9/4.4/5.0/5.5	5.4/6.3/7.2/8.1/9.0
820	6/7/8/9/10/12	2.1/2.4/2.8/3.1/3.4/0.0	3.0/3.5/4.0/4.5/5.0/0.0	0.0/0.0/3.9/4.4/4.9/0.0	4.7/5.5/6.3/7.1/7.9
920	7/8/9/10/11/12	2.1/2.5/2.8/3.1/3.4/3.7	3.2/3.6/4.1/4.5/5.0/5.4	0.0/3.5/3.9/4.3/5.2	4.9/5.6/6.3/7.0/7.7/8.5
1020	7/8/9/10/11/12	1.9/2.2/2.5/2.8/3.0/3.3	2.8/3.2/3.7/4.1/4.5/4.9	0.0/3.1/3.5/3.9/4.7	3.8/4.4/5.1/5.7/6.4/7.0/7.6
1220	8/9/10/11/12/14	1.8/2.1/2.3/2.5/2.8/3.2	2.7/3.1/3.4/3.7/4.1/4.8	2.6/2.9/3.3/3.9/0.0	4.2/4.8/5.3/5.8/6.4/7.4