CN203216822U - Anti-hydrogen sulfide stress corrosion cracking bending test device - Google Patents
Anti-hydrogen sulfide stress corrosion cracking bending test device Download PDFInfo
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- CN203216822U CN203216822U CN 201320132657 CN201320132657U CN203216822U CN 203216822 U CN203216822 U CN 203216822U CN 201320132657 CN201320132657 CN 201320132657 CN 201320132657 U CN201320132657 U CN 201320132657U CN 203216822 U CN203216822 U CN 203216822U
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- stress corrosion
- corrosion cracking
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Abstract
The utility model relates to an anti-hydrogen sulfide stress corrosion cracking bending test device which comprises a rectangular shell (1), wherein a sample bracket (4) is arranged at the bottom of the rectangular shell (1), the upper end port of the rectangular shell (1) is fixedly provided with a cover plate (3) through a bolt pair (5), and a sealed gasket (2) is arranged between the cover plate (3) and the rectangular shell (1) to form a sealed test container. The sample bracket (4) is in a rectangular frame structure, and symmetric grooves (10) are arranged at the front and rear ends. Sample bending clamps (11) can be embedded into the grooves (10). An air inlet pipe (6) and an exhaust pipe (7) are diagonally inserted into the cover plate (3). According to the device provided by the utility model, the anti-hydrogen sulfide stress corrosion cracking test can be conveniently and effectively carried out to detect, evaluate and accurately analyze the anti-hydrogen sulfide stress corrosion cracking capacity of pipelines or equipment, and meanwhile, the change trend of loading stress under a certain corrosive environment along time.
Description
Technical field
The utility model relates to a kind of anti-H 2 S stress corrosion cracking (SSCC) bend test device, mainly for detection of the ability of evaluating material anti-H 2 S stress corrosion cracking in standard solution or simulated condition condition, also can be used for hydrogen induced cracking (HIC) test and detect appraisal.
Background technology
Equipment and the pipeline service condition of enterprises such as oil exploitation conveying, refinery mostly are wet environment, and medium contains H
2S, acidic materials are more, and corrosion is to influence equipment and the key factor in piping system reliability and serviceable life, and wherein H 2 S stress corrosion is one of important form of pipe line steel corrosion.The H 2 S stress corrosion cracking is a kind of hydrogen stress cracking form, the hydrogen atom that is produced by the sulfide corrosion that is adsorbed on the metal surface is caused, belong to a kind of low stress brittle rupture, the plastic yield of macroscopic view seldom appears in metal before fracture, therefore tend to cause the catastrophic failure of absence of aura, bring serious threat to safety in production.The H 2 S stress corrosion cracking is relevant with the size of stress, the steel grade that intensity is more high more is easy to generate this cracking, crackle is mostly along shell thickness direction expansion, because weld seam provides the possibility of bigger unrelieved stress, so this cracking generally occurs in the welding joint position.
The test method of metal resisting sulfide stress cracking and stress corrosion crack in the hydrogen-sulfide environmental (NACE TM0177-2005), the preparation of curved beam stress corrosion sample and the standard implementation rules of using (ASTM G39-99), the corrosion stress corrosion test second portion of metal and alloy: the testing requirements that the preparation of bend specimen and application standards such as (ISO7539-2) proposes and stipulated steel pipe anti-H 2 S bending stress corrosion cracking, intercepting and the preparation of sample have been stipulated, the mensuration program of test operation and parameters, be used for to estimate and detect pipeline or whether device can cause stress corrosion crack under hydrogen-sulfide environmental, thereby the guarantee foundation of safe reliability is provided under arms for equipment or pipeline.
The utility model content
The technical matters that the utility model solves: design a kind of anti-H 2 S stress corrosion cracking bend test device, can make things convenient for, effectively carry out the anti-H 2 S stress corrosion split test, detect to estimate and the accurate anti-H 2 S stress corrosion cracking ability of analysis conduit or equipment, be given under certain corrosion environment loading stress simultaneously along with the variation tendency of time.
Technical solution of the present utility model: a kind of anti-H 2 S stress corrosion cracking bend test device, comprise rectangular housing, the bottom of described rectangular housing is placed with sample mount, the upper port of rectangular housing fixedly has cover plate by bolt is secondary, and is provided with the test chamber that packing washer forms a sealing between cover plate and the rectangular housing; The rectangular framed structure of described sample mount and its front and back end have the groove of symmetry, can embed the sample bending fixture in the described groove, and the place, two diagonal angles of described cover plate is fitted with draft tube and gas outlet.
Described sample mount front and back end has equally spaced three pairs of grooves, and each is to embedding a sample bending fixture in the groove.
Be shaped on three equidistant jacks on the described cover plate, and fleximeter is housed on the jack, and make the detection head of fleximeter be positioned at the top at sample bending fixture center.
The range of described fleximeter is 0～1 inch, and precision is 0.001 inch.
The material of described rectangular housing, cover plate is C276 Hastelloy material; The material of sample mount is teflon.
The advantage that the utlity model has and effect
1, the utility model can make things convenient for, effectively carry out anti-H 2 S stress corrosion cracking (SSCC) bending test, detect the anti-H 2 S stress corrosion cracking ability of estimating and accurately analyze tubing, sheet material or equipment, reduce other factors to the interference of test, and be given under certain corrosion environment loading stress along with the change curve of time.The utility model also can be used for hydrogen induced cracking (HIC) test detection appraisal simultaneously.
2, the utility model can be estimated and detect tubing, sheet material or the equipment anti-H 2 S stress corrosion cracking ability under standard solution or simulation oil field work condition environment, detects tubing, sheet material or equipment and whether occurs crackle in the standard cure hydrogen solution or under the simulation oil field working condition; The fleximeter that is positioned over specimen surface can be used for the monitoring test sample trend that bending stress changed along with the time under standard cure hydrogen solution or simulation oil field working condition.
Description of drawings
Fig. 1 is the utility model structural representation, Fig. 2 is the utility model rectangular housing structural representation, Fig. 3 is the utility model sample mount structural representation, Fig. 4 is the utility model covering plate structure synoptic diagram, Fig. 5, Fig. 6, Fig. 7 are the utility model sample bending fixture structural representation, and Fig. 8 uses constitutional diagram for the utility model.
Embodiment
Below in conjunction with accompanying drawing 1--8 a kind of embodiment of the present utility model is described.
A kind of anti-H 2 S stress corrosion cracking bend test device, comprise rectangular housing 1, the bottom of described rectangular housing 1 is placed with sample mount 4, the upper port of rectangular housing 1 fixedly has cover plate 3 by bolt secondary 5, and is provided with the test chamber that packing washer 2 forms a sealing between cover plate 3 and the rectangular housing 1; Described sample mount 4 materials are that teflon and front and back end have equally spaced three pairs of grooves 10, and each is used for the stationary curved anchor clamps to can embedding a sample bending fixture 11 in the groove 10, avoid being in contact with one another between the test specimen and cause galvanic corrosion; The sample stress loading that the anchor clamps fluctuation that can reduce to be caused by factors such as external shock in the process of the test simultaneously causes changes.Be shaped on three equidistant jacks 9 on the described cover plate 3, and fleximeter 8 is housed on the jack 9, and the top that makes the detection head of fleximeter 8 be positioned at sample bending fixture 11 centers is close to test specimen, be used for measuring test to the size of test specimen 12 loading stresses.The range of described fleximeter 8 is 0～1 inch, and precision is 0.001 inch.The place, two diagonal angles of described cover plate 3 is fitted with draft tube 6 and gas outlet 7.The material of described rectangular housing 1, cover plate 3 is C276 Hastelloy material; Described sample bending fixture 11 is 2 curved, 3 curved or 4 kinking structures.
Test procedure:
The first step is polished, after the dimensional measurement, registration marking, cleaning-drying, cooling, is required to load according to Fig. 5, Fig. 6, Fig. 7 method according to the test loading stress the code test sample;
In second step, by guide pump testing liquid is imported the housing the inside;
The 3rd step was fixed to the anchor clamps that loaded test specimen on the sample mount, then sample mount was placed into housing bottom, and warranty test solution can submergence sample and anchor clamps;
The 4th step was placed into the housing upper port with packing washer, aims at screw then cover plate is covered and the erection bolt pair, again by the spanner pair that tights a bolt.
The 5th step was connected draft tube with nitrogen cylinder, escape pipe is connected with liquid waste treating apparatus, and testing liquid was carried out deoxygenation 2 hours, and gas flow rate is not less than 100 mL/(and divides every liter of testing liquid); After the deoxygenation, feed H
2S gas, speed should be at least 200 mL/(and divide every liter of testing liquid), the duration is 60 minutes.
In the 6th step, duration of test runs 720 hours in the process of the test, must keep H
2S gas malleation.After the time, measure the pH value of solution value, and in solution, feed N
2Gas is removed the H in the solution more than two hours
2S gas.Remove H
2Device for opening takes out sample behind the S, uses the absolute ethyl alcohol washed samples, and whether observe specimen surface has crackle.After experiment finished, washing test device, assurance device did not totally have spot.
The utility model can carry out anti-H 2 S stress corrosion cracking (SSCC) bending test to the code test sample and detect evaluation under standard solution.Standard detecting method, standard solution and code test sample can be with reference to the regulations of following standard: the corrosion stress corrosion test second portion of the test method of metal resisting sulfide stress cracking and stress corrosion crack in the hydrogen-sulfide environmental (NACE TM0177-2005), the preparation of curved beam stress corrosion sample and the standard implementation rules (ASTM G39-99), metal and the alloy that use: the preparation of bend specimen and application (ISO7539-2).
The utility model can be used as hydrogen induced cracking (HIC) test unit, under standard solution the code test sample is detected evaluation.Standard solution and code test sample can be according to the regulations of following standard: pipeline and pressure apparatus are with the anti-hydrogen induced cracking evaluation method of steel (NACE TM0284-2003).
The utility model can be used for the monitoring test sample trend that bending stress changed along with the time under the standard cure hydrogen solution.The utility model also can be used for estimating under the simulation oil field working condition stress corrosion at pipeline or equipment.
Above-described embodiment is preferred embodiment of the present utility model, is not to limit the utility model practical range, so all equivalent variations of being done with the described content of the utility model claim all should be included within the utility model claim scope.
Claims (5)
1. anti-H 2 S stress corrosion cracking bend test device, comprise rectangular housing (1), it is characterized in that: the bottom of described rectangular housing (1) is placed with sample mount (4), the upper port of rectangular housing (1) fixedly has cover plate (3) by bolt pair (5), and is provided with the test chamber that packing washer (2) forms a sealing between cover plate (3) and the rectangular housing (1); The rectangular framed structure of described sample mount (4) and its front and back end have the groove (10) of symmetry, can embed sample bending fixture (11) in the described groove (10), and the place, two diagonal angles of described cover plate (3) is fitted with draft tube (6) and gas outlet (7).
2. a kind of anti-H 2 S stress corrosion cracking bend test device according to claim 1, it is characterized in that: described sample mount (4) front and back end has equally spaced three pairs of grooves (10), and each is to embedding a sample bending fixture (11) in the groove (10).
3. a kind of anti-H 2 S stress corrosion cracking bend test device according to claim 2, it is characterized in that: be shaped on three equidistant jacks (9) on the described cover plate (3), and fleximeter (8) is housed on the jack (9), and makes the detection head of fleximeter (8) be positioned at the top at sample bending fixture (11) center.
4. a kind of anti-H 2 S stress corrosion cracking bend test device according to claim 3, it is characterized in that: the range of described fleximeter (8) is 0～1 inch, precision is 0.001 inch.
5. according to claim 1 or 2 or 3 or 4 described a kind of anti-H 2 S stress corrosion cracking bend test devices, it is characterized in that: the material of described rectangular housing (1), cover plate (3) is C276 Hastelloy material; The material of sample mount (4) is teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320132657 CN203216822U (en) | 2013-03-21 | 2013-03-21 | Anti-hydrogen sulfide stress corrosion cracking bending test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320132657 CN203216822U (en) | 2013-03-21 | 2013-03-21 | Anti-hydrogen sulfide stress corrosion cracking bending test device |
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| Publication Number | Publication Date |
|---|---|
| CN203216822U true CN203216822U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320132657 Expired - Lifetime CN203216822U (en) | 2013-03-21 | 2013-03-21 | Anti-hydrogen sulfide stress corrosion cracking bending test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207141A (en) * | 2013-03-21 | 2013-07-17 | 宝鸡石油钢管有限责任公司 | Hydrogen sulfide resistant stress corrosion cracking and bending test device |
| CN104913962A (en) * | 2015-06-12 | 2015-09-16 | 河海大学 | Manufacturing device and manufacturing method of partially-corroded steel test piece |
| CN110118689A (en) * | 2019-06-25 | 2019-08-13 | 上海海隆石油管材研究所 | A kind of hydrogen sulfide production test cold rolling four-point bending sample |
| US11747241B2 (en) | 2021-03-01 | 2023-09-05 | Saudi Arabian Oil Company | Method of testing longitudinal submerged arc welded pipe susceptibility through-thickness hydrogen cracking |
-
2013
- 2013-03-21 CN CN 201320132657 patent/CN203216822U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207141A (en) * | 2013-03-21 | 2013-07-17 | 宝鸡石油钢管有限责任公司 | Hydrogen sulfide resistant stress corrosion cracking and bending test device |
| CN104913962A (en) * | 2015-06-12 | 2015-09-16 | 河海大学 | Manufacturing device and manufacturing method of partially-corroded steel test piece |
| CN104913962B (en) * | 2015-06-12 | 2017-06-16 | 河海大学 | The producing device and preparation method of a kind of local corrosion steel test specimen |
| CN110118689A (en) * | 2019-06-25 | 2019-08-13 | 上海海隆石油管材研究所 | A kind of hydrogen sulfide production test cold rolling four-point bending sample |
| US11747241B2 (en) | 2021-03-01 | 2023-09-05 | Saudi Arabian Oil Company | Method of testing longitudinal submerged arc welded pipe susceptibility through-thickness hydrogen cracking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181016 Address after: 100007 Dongzhimen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: BAOJI PETROLEUM STEEL PIPE Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 721008 jiangtan Road, Baoji, Shaanxi 10 Patentee before: BAOJI PETROLEUM STEEL PIPE Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |