CN104384735B - The method of welding fire prevention isolation in a kind of oil and gas pipes fire operation - Google Patents
The method of welding fire prevention isolation in a kind of oil and gas pipes fire operation Download PDFInfo
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- CN104384735B CN104384735B CN201410421567.6A CN201410421567A CN104384735B CN 104384735 B CN104384735 B CN 104384735B CN 201410421567 A CN201410421567 A CN 201410421567A CN 104384735 B CN104384735 B CN 104384735B
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- Prior art keywords
- nacl
- heating tube
- oil
- pipeline
- butter
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/10—Pipe-lines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The method of welding fire prevention isolation in a kind of oil and gas pipes fire operation disclosed by the invention, the method comprises first carries out pressure release oil extraction to oil and gas pipeline, measure Nacl and butter, and take according to mass percent, Nacl is 40%-60%, butter is 40%-60%, both are mixed and stirs, Nacl and butter are mixed, after loading pipeline after Nacl being loaded heating tube hot briquetting, reinstall the mixture of Nacl and butter, pipeline welding equipment is used to weld, warm water is finally used to clean pipeline, in oil and gas pipes fire operation of the present invention, fire prevention isolation welding method adopts Nacl to carry out fire prevention isolation, easy to operate, successful, Nacl is cheap simultaneously, cost is lower.
Description
Technical field
The invention belongs to oil and gas pipeline technical field, relate to the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation.
Background technology
When carrying out utilizing steel pipe growing distance oil transportation; often there will be maintenance, the situation of welded pipe line of getting angry; even if stopping transportation; oil and gas pipeline is inner or can have a certain amount of oil product, oil gas; and with certain pressure; in order to construction safety, oil gas a little must be kept apart with getting angry, prevent blast, the generation of fire hazard accident.In current oil and gas pipes hot work and pipe-line maintenance repairing process, the oil gas isolation of getting angry a little uses butter wall, butter wall is unstable, easily collapses in long-time hot work process, reveals oil gas, threaten hot work safety, easily produce flowing when high temperature simultaneously, form gap, after pump is opened in end of getting angry, butter can carry out in pump along with oily stream, the component of machine such as choma, mechanical seal, balance pipe of infringement pump.
Summary of the invention
The object of this invention is to provide in a kind of oil and gas pipes fire operation the method for welding isolation of preventing fires, solve in prior art and use butter wall to carry out when preventing fires isolation, easily producing the unstable technical problem causing oil gas leakage flameproof effect not good of butter wall.
The technical solution adopted in the present invention is, the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation, specifically implements according to following steps:
Step 1: carry out pressure release, oil extraction to oil and gas pipeline, if pipeline does not possess the condition of pressure release, oil extraction, then carries out non-stop plugging to pipeline, ensures that the pipeline needing to arrange fire prevention divider wall is without oil, without pressure;
Step 2: measure Nacl and butter, and take according to mass percent, Nacl is 40%-60%, and butter is 40%-60%, both is mixed and stirs, and Nacl and butter are mixed;
Step 3: take Nacl and load in heating tube, the internal diameter of heating tube is equal with oil and gas pipes internal diameter, and the heating tube electrified regulation loading Nacl is made the shaping caking of Nacl;
Step 4: Nacl in type in step 3 heating tube is taken out and is arranged at step 1 pressure release, without in oily pipeline, described in type Nacl loads position away from fire operation solder side, the shaping Nacl length loaded is that 2D-4D, D refer to outer diameter tube;
Step: 5: the Nacl prepared by step 2 and butter mixture are loaded above-mentioned steps 4 pipeline in, the Nacl loaded and butter mixture length are 1/2D-1D, D refers to outer diameter tube, and by Nacl and the compacting of butter mixture, Nacl and butter mixture are near fire operation solder side and be close to the Nacl end face that step 4 loads, and make Nacl and butter mixture be 250mm-300mm near the cross section of fire operation and the distance of getting angry between solder side simultaneously;
Step 6: use the impaired place of the pipeline of pipeline welding equipment to step 5 to weld;
Step 7: after the weld job of getting angry of step 6 completes, injects 45 DEG C of-65 DEG C of water in the duct and carries out pipe blow-through, and by the water discharge pipe road after cleaning, namely completes the fire prevention isolation welding in oil and gas pipes fire operation.
Feature of the present invention is also:
Step 3 is specifically implemented according to following steps:
Step 3.1: will obtain in Nacl and add water and stir, makes Nacl moist;
Step 3.2: loaded in heating tube by Nacl obtained for step 3.1, the internal diameter of heating tube is equal with oil and gas pipes internal diameter;
Step 3.3: switched on power by the heating tube of step 3.2 and heat, until the shaping caking of Nacl.
Heating tube comprises the heating tube body A and heating tube body B that are provided with cavity, heating tube body A and heating tube body B are two semicylinders be separated along cylinder bus, heating tube body A outer wall is provided with snap close, heating tube body B outer wall is provided with the snap close seat matched, heating tube body A and heating tube body B inwall are surrounded with heater strip respectively, heating tube body B outer wall is also provided with electric power connection line.
The invention has the beneficial effects as follows that the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation provided by the invention the process employs particle industry salt and carries out fire prevention isolation, particle industry salt has heat absorption capacity, is filled into pipe interior, can reduce ducted environment temperature, be beneficial to fire operation, Nacl is water-soluble, after fire operation, Nacl dissolves by input warm water, discharge with current, do not stay residue, also not injury device, Nacl is cheap simultaneously, and use cost is lower.
Accompanying drawing explanation
Pipeline configuration schematic diagram when Fig. 1 is the method adopting welding fire prevention isolation in a kind of oil and gas pipes fire operation of the present invention;
Fig. 2 is the structural representation of heating tube in the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation of the present invention;
Fig. 3 is the structural representation of heating tube in the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation of the present invention.
In figure: 1. heating tube, 11. heating tube body A, 12. heating tube body B, 13. electric power connection lines, 14. heater strips, 15. snap closes, 16. snap close seats.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The present invention is the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation, specifically implements according to following steps:
Step 1: carry out pressure release, oil extraction to oil and gas pipeline, if pipeline does not possess the condition of pressure release, oil extraction, then carries out non-stop plugging to pipeline, ensures that the pipeline needing to arrange fire prevention divider wall is without oil, without pressure;
Step 2: measure Nacl and butter, and take according to mass percent, Nacl is 40%-60%, and butter is 40%-60%, both is mixed and stirs;
Step 3:
Step 3.1: will obtain in Nacl and add water and stir, makes Nacl moist;
Step 3.2: loaded in heating tube by Nacl obtained for step 3.1, the internal diameter of heating tube is equal with oil and gas pipes internal diameter;
Step 3.3: switched on power by the heating tube of step 3.2 and heat, until the shaping caking of Nacl.
Step 4: Nacl in type in step 3 heating tube is taken out and is arranged at step 1 pressure release, without in oily pipeline, described in type Nacl loads position away from fire operation solder side, the shaping Nacl length loaded is that 2D-4D, D refer to outer diameter tube;
Step 5: again the Nacl prepared by step 2 and butter mixture are loaded above-mentioned steps 4 pipeline in, the Nacl loaded and butter mixture length are 1/2D-1D, D refers to outer diameter tube, and by Nacl and the compacting of butter mixture, described Nacl and butter mixture are near fire operation solder side and be close to the shaping Nacl end face that step 4 loads, and make Nacl and butter mixture be 250mm-300mm near the cross section of fire operation and the distance of getting angry between solder side simultaneously;
Step 6: use the impaired place of the pipeline of pipeline welding equipment to step 5 to weld;
Step 7: after the weld job of getting angry of step 6 completes, injects 45 DEG C of-65 DEG C of water in the duct and carries out pipe blow-through, and by the water discharge pipe road after cleaning, namely completes the fire prevention isolation welding in oil and gas pipes fire operation.
The heating tube used in the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation of the present invention comprises the heating tube body A11 and heating tube body B12 that are provided with cavity, heating tube body A11 and heating tube body B12 are two semicylinders be separated along cylinder bus, heating tube body A11 outer wall is provided with snap close 15, heating tube body B12 outer wall is provided with the snap close seat 16 matched, heating tube body A11 and heating tube body B12 inwall are surrounded with heater strip 14 respectively, heating tube body B12 outer wall is also provided with electric power connection line 13.
The using method of heating tube: heating tube is made up of the two parts be separated, the Nacl of humidity is loaded heating tube body B12, again heating tube body A11 and heating tube body B12 is fastened, install snap close 15, electric power connection line 13 on heating tube body B12 is switched on power, to heating tube electrified regulation, until the shaping caking of the Nacl of humidity, finally open snap close 15, shaping Nacl is taken out.
The invention provides the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation, use the mixture of Nacl and Nacl and butter as fire prevention divider wall in this method, Nacl has heat absorption capacity, be filled into pipe interior, heat in energy extraction duct, reduce environment temperature in pipeline, be conducive to pipeline welding equipment and carry out fire operation; Nacl is also water-soluble, after welding of getting angry completes, pours into warm water in the duct and is dissolved by Nacl, and by its discharge line, do not stay residue in the duct like this, can not cause damage to equipment; Nacl not easily flows in high temperature environments, namely when getting angry welding along with pipeline in the rising of environment temperature, Nacl not easily flows, welding quality of getting angry can not be reduced, in the process of isolation, use heating tube to carry out hot briquetting to Nacl, this kind of heating-pipe structure is simple, easy to use simultaneously, can reuse, improve isolation bonding speed.
Embodiment 1:
Step 1: carry out pressure release, oil extraction to oil and gas pipeline, if pipeline does not possess the condition of pressure release, oil extraction, then carries out non-stop plugging to pipeline, ensures that the pipeline needing to arrange fire prevention divider wall is without oil, without pressure;
Step 2: measure Nacl and butter, and take according to mass percent, Nacl is 40%, and butter is 60%, both is mixed and stirs, and Nacl and butter are mixed;
Step 3:
Step 3.1: will obtain in Nacl and add water and stir, makes Nacl moist;
Step 3.2: loaded in heating tube by Nacl obtained for step 3.1, the internal diameter of heating tube is equal with oil and gas pipes internal diameter;
Step 3.3: switched on power by the heating tube of step 3.2 and heat, until the shaping caking of Nacl;
Step 4: taken out by Nacl in type in step 3 heating tube and be arranged in the pipeline of step 1 pressure release, nothing oil, described in type Nacl loads position away from fire operation solder side, and the shaping Nacl length of loading is that 2D, D refer to outer diameter tube;
Step 5: again the Nacl prepared by step 2 and butter mixture are loaded in the pipeline of above-mentioned steps 4, the Nacl loaded and butter mixture length are 1D, D refers to outer diameter tube, and by Nacl and the compacting of butter mixture, described Nacl and butter mixture are near fire operation solder side and be close to the Nacl end face that step 4 loads, and ensure that Nacl and butter mixture are 250mm near the cross section of fire operation and the distance of getting angry between solder side simultaneously;
Step 6: use the impaired place of the pipeline of pipeline welding equipment to step 5 to weld;
Step 7: after the weld job of getting angry of step 6 completes, injects 45 DEG C of water in the duct and carries out pipe blow-through, and by the water discharge pipe road after cleaning, namely completes the fire prevention isolation welding in oil and gas pipes fire operation.
Embodiment 2:
Step 1: carry out pressure release, oil extraction to oil and gas pipeline, if pipeline does not possess the condition of pressure release, oil extraction, then carries out non-stop plugging to pipeline, ensures that the pipeline needing to arrange fire prevention divider wall is without oil, without pressure;
Step 2: measure Nacl and butter, and take according to mass percent, Nacl is 50%, and butter is 50%, both is mixed and stirs, and Nacl and butter are mixed;
Step 3:
Step 3.1: will obtain in Nacl and add water and stir, makes Nacl moist;
Step 3.2: loaded in heating tube by Nacl obtained for step 3.1, the internal diameter of heating tube is equal with oil and gas pipes internal diameter;
Step 3.3: switched on power by the heating tube of step 3.2 and heat, until the shaping caking of Nacl;
Step 4: taken out by Nacl in type in step 3 heating tube and be arranged in the pipeline of step 1 pressure release, nothing oil, described in type Nacl loads position away from fire operation solder side, and the shaping Nacl length of loading is that 4D, D refer to outer diameter tube;
Step 5: the Nacl prepared by step 2 and butter mixture are loaded above-mentioned steps 4 pipeline in, the Nacl loaded and butter mixture length are 1/2D, D refers to outer diameter tube, and by Nacl and the compacting of butter mixture, described Nacl and butter mixture are near fire operation solder side and be close to the Nacl end face that step 4 loads, and ensure that Nacl and butter mixture are 280mm near the cross section of fire operation and the distance of getting angry between solder side simultaneously;
Step 6: use the impaired place of the pipeline of pipeline welding equipment to step 5 to weld;
Step 7: after the weld job of getting angry of step 6 completes, injects 60 DEG C of water in the duct and carries out pipe blow-through, and by the water discharge pipe road after cleaning, namely completes the fire prevention isolation welding in oil and gas pipes fire operation.
Embodiment 3:
Step 1: carry out pressure release, oil extraction to oil and gas pipeline, if pipeline does not possess the condition of pressure release, oil extraction, then carries out non-stop plugging to pipeline, ensures that the pipeline needing to arrange fire prevention divider wall is without oil, without pressure;
Step 2: measure Nacl and butter, and take according to mass percent, Nacl is 60%, and butter is 40%, both is mixed and stirs, and Nacl and butter are mixed;
Step 3:
Step 3.1: will obtain in Nacl and add water and stir, makes Nacl moist;
Step 3.2: loaded in heating tube by Nacl obtained for step 3.1, the internal diameter of heating tube is equal with oil and gas pipes internal diameter;
Step 3.3: switched on power by the heating tube of step 3.2 and heat, until the shaping caking of Nacl;
Step 4: taken out by Nacl in type in step 3 heating tube and be arranged in the pipeline of step 1 pressure release, nothing oil, described in type Nacl loads position away from fire operation solder side, and the shaping Nacl length of loading is that 3D, D refer to outer diameter tube;
Step 5: the Nacl prepared by step 2 and butter mixture are loaded above-mentioned steps 4 pipeline in, the Nacl loaded and butter mixture length are 0.8D, D refers to outer diameter tube, and by Nacl and the compacting of butter mixture, described Nacl and butter mixture are near fire operation solder side and be close to the Nacl end face that step 3 loads, and ensure that Nacl and butter mixture are 300mm near the cross section of fire operation and the distance of getting angry between solder side simultaneously;
Step 6: use the impaired place of the pipeline of pipeline welding equipment to step 5 to weld;
Step 7: after the weld job of getting angry of step 6 completes, injects 65 DEG C of water in the duct and carries out pipe blow-through, and by the water discharge pipe road after cleaning, namely completes the fire prevention isolation welding in oil and gas pipes fire operation.
Employing Nacl provided by the invention is as fire prevention divider wall, easy to operate in the process used, successful, avoids and only adopts butter as the shortcoming of fire wall.
Claims (3)
1. a method for welding fire prevention isolation in oil and gas pipes fire operation, is characterized in that, specifically implement according to following steps:
Step 1: carry out pressure release, oil extraction to oil and gas pipeline, if pipeline does not possess the condition of pressure release, oil extraction, then carries out non-stop plugging to pipeline, ensures that the pipeline needing to arrange fire prevention divider wall is without oil, without pressure;
Step 2: measure Nacl and butter, and take according to mass percent, Nacl is 40%-60%, and butter is 40%-60%, both is mixed and stirs;
Step 3: take Nacl and load in heating tube, the internal diameter of heating tube is equal with oil and gas pipes internal diameter, and the heating tube electrified regulation loading Nacl is made the shaping caking of Nacl;
Step 4: Nacl in type in step 3 heating tube is taken out and is arranged at step 1 pressure release, without in oily pipeline, described in type Nacl loads position away from fire operation solder side, the shaping Nacl length loaded is that 2D-4D, D refer to outer diameter tube;
Step 5: again the Nacl prepared by step 2 and butter mixture are loaded in the pipeline of above-mentioned steps 4, the Nacl loaded and butter mixture length are 1/2D-1D, D refers to outer diameter tube, and by Nacl and the compacting of butter mixture, described Nacl and butter mixture are near fire operation solder side and be close to the shaping Nacl end face that step 4 loads, and make Nacl and butter mixture be 250mm-300mm near the cross section of fire operation and the distance of getting angry between solder side simultaneously;
Step 6: use the impaired place of the pipeline of pipeline welding equipment to step 5 to weld;
Step 7: after the weld job of getting angry of step 6 completes, injects 45 DEG C of-65 DEG C of water in the duct and carries out pipe blow-through, and by the water discharge pipe road after cleaning, namely completes the fire prevention isolation welding in oil and gas pipes fire operation.
2. the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation according to claim 1, it is characterized in that, step 3 is specifically implemented according to following steps:
Step 3.1: will add water in the Nacl obtained and stir, makes Nacl moist;
Step 3.2: loaded in heating tube by Nacl obtained for step 3.1, the internal diameter of heating tube is equal with oil and gas pipes internal diameter;
Step 3.3: switched on power by the heating tube of step 3.2 and heat, until the shaping caking of Nacl.
3. the method for welding fire prevention isolation in a kind of oil and gas pipes fire operation according to claims 1 or 2, it is characterized in that, described heating tube comprises the heating tube body A (11) and heating tube body B (12) that are provided with cavity, described heating tube body A (11) and heating tube body B (12) are two semicylinders be separated along cylinder bus, heating tube body A (11) outer wall is provided with snap close (15), heating tube body B (12) outer wall is provided with the snap close seat (16) matched, described heating tube body A (11) and heating tube body B (12) inwall are surrounded with heater strip (14) respectively, heating tube body B (12) outer wall is also provided with electric power connection line (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421567.6A CN104384735B (en) | 2014-08-25 | 2014-08-25 | The method of welding fire prevention isolation in a kind of oil and gas pipes fire operation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410421567.6A CN104384735B (en) | 2014-08-25 | 2014-08-25 | The method of welding fire prevention isolation in a kind of oil and gas pipes fire operation |
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| Publication Number | Publication Date |
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| CN104384735A CN104384735A (en) | 2015-03-04 |
| CN104384735B true CN104384735B (en) | 2016-03-16 |
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| CN107435778A (en) * | 2016-05-27 | 2017-12-05 | 中国石油天然气股份有限公司 | A kind of upright oil-gas pipeline flame proof method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09303622A (en) * | 1996-05-09 | 1997-11-28 | Tokyo Gas Co Ltd | Cover repairing and protecting method for piping system |
| CN102853204B (en) * | 2011-06-28 | 2014-03-19 | 宝山钢铁股份有限公司 | Online disconnecting and connecting method of heavy oil pipeline |
| CN103016893B (en) * | 2011-09-21 | 2014-08-13 | 中国建筑第七工程局有限公司 | Hot tapping plugging construction method of long natural gas delivery pipeline |
| CN202861606U (en) * | 2012-10-17 | 2013-04-10 | 中石化第五建设有限公司 | Inflatable plugging device in pipe used for stainless steel pipeline argon arc welding |
| CN103899877B (en) * | 2014-03-25 | 2015-12-30 | 西南石油大学 | A kind of oil transportation large pipeline implements the temporary blocking method of welding |
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