CN102023119A - Water pressure test method for strength of container and pipeline at low temperature - Google Patents
Water pressure test method for strength of container and pipeline at low temperature Download PDFInfo
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- CN102023119A CN102023119A CN2009101960905A CN200910196090A CN102023119A CN 102023119 A CN102023119 A CN 102023119A CN 2009101960905 A CN2009101960905 A CN 2009101960905A CN 200910196090 A CN200910196090 A CN 200910196090A CN 102023119 A CN102023119 A CN 102023119A
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Abstract
The invention relates to the field of fluid pressure tests, in particular to a water pressure test method for the strength of a container and a pipeline at low temperature. The water pressure test method for the strength of the container and the pipeline at low temperature comprises the following steps of: detecting before a test, manufacturing a temporary heating water tank, configuring a heat radiating pipe, connecting with a hot water pump, heating, injecting hot water and carrying out a water pressure test for strength. The method is characterized in that the capacity of the temporary heating water tank (1) is 1/30-1/15 that of the container to be tested for pressure when the temporary heating water tank (1) is manufactured; a water inlet (11) of the temporary heating water tank (1) is connected with a water inlet pipeline through a valve, and a water outlet (11) of the temporary heating water tank (1) is connected with a water inlet of the hot water pump through a valve. The water pressure test for strength comprises the following steps of: closing the valve before a water inlet of the container to be tested for pressure, maintaining the temperature of water in the container to be tested for pressure, and carrying out the water pressure test for strength. The invention can accelerate the progress of works and increase economic benefits.
Description
Technical field
The present invention relates to hydrodynamic pressure test field, be specially the water pressure test for strength method of container and pipeline under a kind of low temperature.
Background technology
According to the technical requirement of winter construction regulation, when environment temperature drops to below 5 ℃,, generally do not carry out the water pressure test for strength of container and pipeline for protection equipment and pipeline prevent freezingly.But China is vast in territory, and northern area has long cold season, is 4 to 5 months, and stopping operation in the long like this time to influence the construction period greatly, increases engineering cost.Under low-temperature condition, can adopt the method for " reduce test aqueous solution freezing point " to carry out hydraulic pressure tests by force, its principle is to add antifreeze to make freezing point of solution reduce, antifreeze commonly used has methyl alcohol, ethanol, glycerine, sodium chloride, lime chloride, ethylene glycol etc., in order to prevent that freeze proof solution is to container and Corrosion of Pipeline, also must mix a small amount of corrosion inhibiter simultaneously, so just make that the whole cost of antifreeze is higher.In addition, behind the antifreeze wiring solution-forming, also need place at ambient temperature 24～48 hours before the use, can use after no abnormal, this certainly will cause the test claim for eot.Therefore antifreeze generally only is used for the hydrostatic test of small pipeline and container.
Summary of the invention
In order to overcome the defective of prior art, provide a kind of can be under low-temperature condition not only economy but also carry out the water pressure test for strength method easily, the invention discloses the water pressure test for strength method of container and pipeline under a kind of low temperature.
The present invention reaches goal of the invention by following technical solution:
The water pressure test for strength method of container and pipeline under a kind of low temperature, comprise the preceding detection of test, make interim heating water tank, dispose radiating tube, connect heat-exchanger pump, heating, injection hot water, carry out these seven steps of water pressure test for strength, when detecting before the test, prepare a small amount of freeze proof solution, antifreeze is selected any one in methyl alcohol, ethanol, glycerine, sodium chloride, lime chloride and the ethylene glycol for use, adopt the airtight method check to treat the impermeability and the bearing capacity of pressure testing container, treat during check to charge into pressurized air in the pressure testing container, and keep and treat that pressure testing container internal gas pressure is at 5kg/cm
2～6kg/cm
2, it is characterized in that:
When making interim heating water tank, the volume of interim heating water tank is to treat 1/30～1/15 of pressure testing vessel volume; Interim heating water tank water inlet is connected with inlet channel by valve, and interim heating water tank water delivering orifice is connected by the water inlet of valve and heat-exchanger pump,
During the configuration radiating tube, treating 1～2 layer of snakelike radiating tube of pressure testing container bottom configuration, radiating tube is connected with liquid outlet with the inlet for the treatment of the pressure testing container respectively,
When connecting heat-exchanger pump, with the water delivering orifice of heat-exchanger pump respectively with treat that pressure testing container and radiating tube are connected,
During heating, well heater adopts any one in flame heat, electrical heating or the steam radiation, and the water in the interim heating water tank is heated; Utilize heat-exchanger pump and treat the snakelike radiating tube of pressure testing container bottom, will treat preheating temperature in the pressure testing container,
When injecting hot water, utilize heat-exchanger pump to preheating treat fill with hot water in the pressure testing container, after utilize heat-exchanger pump to be forced into the rated operating pressure of heat-exchanger pump,
When carrying out water pressure test for strength, close the valve for the treatment of that pressure testing container water inlet is preceding, keep the temperature for the treatment of water in the pressure testing container, carry out water pressure test for strength.
The water pressure test for strength method of container and pipeline under the described low temperature is characterized in that: when making interim heating water tank, the volume of interim heating water tank is to treat 1/20 of pressure testing vessel volume.
The water pressure test for strength method of container and pipeline under the described low temperature is characterized in that: during the configuration radiating tube, the caliber of radiating tube adopts the steel pipe of Φ 32mm～Φ 57mm.
The water pressure test for strength method of container and pipeline under the described low temperature is characterized in that: when connecting heat-exchanger pump, the heatproof of heat-exchanger pump is more than 120 ℃.
Test method disclosed in this invention, by laying the ancillary method of radiating tube and the interim heating water tank of configuration, solution temperature is higher than freezing point when keeping test, avoid water in container, to freeze, solve the problem that container and pipeline can not carry out water pressure test for strength under low-temperature condition, can speed up the work, reduced engineering cost, equipment is put into operation early, increase economic benefit.The invention has the beneficial effects as follows: 1. simple to operate, test effect satisfies the production run requirement, can guarantee the normally operation on time of producing; 2. can speed up the work, the reduction of erection time, reduce engineering cost, equipment can be put into operation early, increase economic benefit.
Description of drawings
Fig. 1 is the structural representation of interim heating water tank among the present invention.
Embodiment
Below further specify the present invention by specific embodiment.
The water pressure test for strength method that adopts earlier container and pipeline under the low temperature is that environment temperature is lower than under 5 ℃ the condition container is carried out water pressure test for strength at low temperature.
The preceding preparation of at first constructing.Determine the water pressure test for strength date according to the local weather situation; According to when test the local environment minimum temperature select the freezing point of freeze proof solution, antifreeze is selected any one in methyl alcohol, ethanol, glycerine, sodium chloride, lime chloride and the ethylene glycol for use, should follow when using freeze proof aqueous solution and test earlier the principle of afterwards using.
Then by detecting, make interim heating water tank, configuration radiating tube before the test, connect heat-exchanger pump, heating, injection hot water, carrying out these seven steps in sequence of water pressure test for strength and carry out:
When detecting before the test, prepare a small amount of freeze proof solution, antifreeze is selected any one in methyl alcohol, ethanol, glycerine, sodium chloride, lime chloride and the ethylene glycol for use, adopt airtight method to utilize freeze proof solution check to treat the impermeability and the bearing capacity of pressure testing container, the tightness of pressure testing container and pipe welding seam, flange is treated in inspection, and in time handles various defectives.Treat during check to charge into pressurized air in the pressure testing container, and keep and treat that pressure testing container internal gas pressure is at 5kg/cm
2～6kg/cm
2
When making interim heating water tank 1, interim heating water tank 1 as shown in Figure 1, its volume is to treat 120 of pressure testing vessel volume; Interim heating water tank water inlet 11 is connected with inlet channel by valve, and interim heating water tank water delivering orifice 11 is connected by the water inlet of valve and heat-exchanger pump.
During the configuration radiating tube, treating 2 layers of snakelike radiating tube of pressure testing container bottom configuration, radiating tube is connected with liquid outlet with the inlet for the treatment of the pressure testing container respectively, and the caliber of radiating tube adopts the steel pipe of Φ 32mm～Φ 57mm.
When connecting heat-exchanger pump, with the water delivering orifice of heat-exchanger pump respectively with treat that pressure testing container and radiating tube are connected, the heatproof of heat-exchanger pump is more than 120 ℃.。
During heating, well heater 2 adopts any one in flame heat, electrical heating or the steam radiation, and the water in the interim heating water tank 1 is heated; As shown in Figure 1, the arrow A indication is the heat radiation direction among the figure.Utilize heat-exchanger pump and treat the snakelike radiating tube of pressure testing container bottom, will treat preheating temperature in the pressure testing container.
When injecting hot water, utilize heat-exchanger pump to preheating treat fill with hot water in the pressure testing container, after utilize heat-exchanger pump to be forced into the rated operating pressure of heat-exchanger pump.
When carrying out water pressure test for strength, close the valve for the treatment of that pressure testing container water inlet is preceding, open the hot water circulation valve for the treatment of the pressure testing container comprehensively, keep the temperature for the treatment of water in the pressure testing container, carry out water pressure test for strength.
Claims (4)
1. the water pressure test for strength method of container and pipeline under the low temperature, comprise the preceding detection of test, make interim heating water tank, dispose radiating tube, connect heat-exchanger pump, heating, injection hot water, carry out these seven steps of water pressure test for strength, when detecting before the test, prepare a small amount of freeze proof solution, antifreeze is selected any one in methyl alcohol, ethanol, glycerine, sodium chloride, lime chloride and the ethylene glycol for use, adopt the airtight method check to treat the impermeability and the bearing capacity of pressure testing container, treat during check to charge into pressurized air in the pressure testing container, and keep and treat that pressure testing container internal gas pressure is at 5kg/cm
2～6kg/cm
2, it is characterized in that:
When making interim heating water tank (1), the volume of interim heating water tank (1) is to treat 1/30～1/15 of pressure testing vessel volume; Interim heating water tank water inlet (11) is connected with inlet channel by valve, and interim heating water tank water delivering orifice (11) is connected by the water inlet of valve and heat-exchanger pump,
During the configuration radiating tube, treating 1～2 layer of snakelike radiating tube of pressure testing container bottom configuration, radiating tube is connected with liquid outlet with the inlet for the treatment of the pressure testing container respectively,
When connecting heat-exchanger pump, with the water delivering orifice of heat-exchanger pump respectively with treat that pressure testing container and radiating tube are connected,
During heating, well heater (2) adopts any one in flame heat, electrical heating or the steam radiation, and the water in the interim heating water tank (1) is heated; Utilize heat-exchanger pump and treat the snakelike radiating tube of pressure testing container bottom, will treat preheating temperature in the pressure testing container,
When injecting hot water, utilize heat-exchanger pump to preheating treat fill with hot water in the pressure testing container, after utilize heat-exchanger pump to be forced into the rated operating pressure of heat-exchanger pump,
When carrying out water pressure test for strength, close the valve for the treatment of that pressure testing container water inlet is preceding, keep the temperature for the treatment of water in the pressure testing container, carry out water pressure test for strength.
2. the water pressure test for strength method of container and pipeline under the low temperature as claimed in claim 1 is characterized in that: when making interim heating water tank (1), the volume of interim heating water tank (1) is to treat 1/20 of pressure testing vessel volume.
3. the water pressure test for strength method of container and pipeline under the low temperature as claimed in claim 1 is characterized in that: during the configuration radiating tube, the caliber of radiating tube adopts the steel pipe of Φ 32mm～Φ 57mm.
4. the water pressure test for strength method of container and pipeline under the low temperature as claimed in claim 1 is characterized in that: when connecting heat-exchanger pump, the heatproof of heat-exchanger pump is more than 120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101960905A CN102023119A (en) | 2009-09-22 | 2009-09-22 | Water pressure test method for strength of container and pipeline at low temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101960905A CN102023119A (en) | 2009-09-22 | 2009-09-22 | Water pressure test method for strength of container and pipeline at low temperature |
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| CN102023119A true CN102023119A (en) | 2011-04-20 |
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| CN2009101960905A Pending CN102023119A (en) | 2009-09-22 | 2009-09-22 | Water pressure test method for strength of container and pipeline at low temperature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403460A (en) * | 2015-11-30 | 2016-03-16 | 芜湖恒美电热器具有限公司 | Hydraulic press for heating pipe of water heater |
| CN105698010A (en) * | 2014-11-25 | 2016-06-22 | 烟台地源空调科技有限公司 | Winter pipe network field construction leakage check method |
| CN109830152A (en) * | 2019-01-11 | 2019-05-31 | 刘梓旭 | A kind of experimental provision for fluid pressure test |
| CN113588432A (en) * | 2021-07-13 | 2021-11-02 | 鞍钢化学科技有限公司 | Pipeline pressure testing method in low-temperature environment |
-
2009
- 2009-09-22 CN CN2009101960905A patent/CN102023119A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698010A (en) * | 2014-11-25 | 2016-06-22 | 烟台地源空调科技有限公司 | Winter pipe network field construction leakage check method |
| CN105403460A (en) * | 2015-11-30 | 2016-03-16 | 芜湖恒美电热器具有限公司 | Hydraulic press for heating pipe of water heater |
| CN109830152A (en) * | 2019-01-11 | 2019-05-31 | 刘梓旭 | A kind of experimental provision for fluid pressure test |
| CN109830152B (en) * | 2019-01-11 | 2021-08-03 | 刘梓旭 | Experimental device for be used for fluid pressure test |
| CN113588432A (en) * | 2021-07-13 | 2021-11-02 | 鞍钢化学科技有限公司 | Pipeline pressure testing method in low-temperature environment |
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Application publication date: 20110420 |