Safety management
The flaw detection agents used in penetrant testing are almost all oily flammable substances. Special attention should be paid to fire prevention. The flaw detection agents are generally non-toxic or low-toxic, and people will also feel uncomfortable when touching. In sealed containers or indoors, adequate ventilation is required.
Features
1) Applicable to any kind of materials except loose porous materials, suitable for surface defect detection of non-ferromagnetic materials.
2) For work-pieces whose structure, shape and size are not conducive to magnetization, infiltration can be used.
3) Unable to detect buried defects and closed defects.
4) There are defects in several directions at the same time, only one flaw detection operation is needed for penetrant testing, and magnetization testing needs to be performed in at least two directions.
http://www.xysteelpipe.com/info/Safety-management-and-characteristics-of-penetration-test-1694-1.htm
2020年6月21日星期日
Large Diameter J55 Long Round Buckle Oil Casing Pipe
The main standard of large-diameter J55 oil casing pipe is API 5L, the outer diameter of large-diameter oil casing is expressed in inches, and 1b/ft is the unit of weight. The oil casing adopts different materials according to different strengths and well depths and conditions. The main materials are K55 oil casing, J55 oil casing, N80, P110 oil casing. The problems that often occur in large-diameter oil casings are broken buckles, damaged wire buckles, black buckles, pipe folds, and casing brittle fractures. "P" for large-diameter oil casing represents flat end, "L" represents long round buckle, "B" represents partial trapezoid buckle, and "S" represents short round buckle. The length of J55 oil casing is within 12 meters, and it can be processed according to the needs of customers.
Long round buckle oil casing, abbreviated as Ltc. in English, is a widely used buckle shape of oil casing. The thread shape at both ends of the pipe body is like an oblong shape, so it is called long round buckle oil casing.
There are three specified lengths of API long round buckle oil casing: R-1 is 4.88～7.62m, R-2 is 7.62～10.36m, R-3 is 10.36m to longer. The main materials include J55, K55, N80, L80, C90, T95, P110, Q125, V150. Among them, the H-40 steel grade is the lowest, and the P-110 steel grade has the highest strength. According to the different steel grades, the color of the casing is also different. The commonly used steel grades are J-55 painted green, N-80 painted red, and P-110 painted white.The mechanical properties of the three long round buckle oil casings are mainly hydrostatic pressure test, flattening test, sulfide stress corrosion cracking test, hardness test, tensile test and transverse impact test. Where the geological conditions are complex, the casing is also required to have anti-collapse properties. The oblong thread has the advantages of easy processing, good sealing, certain connection strength, simple on-site maintenance and use, and low price. It is widely used in casing connection.
http://www.xysteelpipe.com/info/Large-Diameter-J55-Long-Round-Buckle-Oil-Casing-Pipe-1693-1.htm
Long round buckle oil casing, abbreviated as Ltc. in English, is a widely used buckle shape of oil casing. The thread shape at both ends of the pipe body is like an oblong shape, so it is called long round buckle oil casing.
There are three specified lengths of API long round buckle oil casing: R-1 is 4.88～7.62m, R-2 is 7.62～10.36m, R-3 is 10.36m to longer. The main materials include J55, K55, N80, L80, C90, T95, P110, Q125, V150. Among them, the H-40 steel grade is the lowest, and the P-110 steel grade has the highest strength. According to the different steel grades, the color of the casing is also different. The commonly used steel grades are J-55 painted green, N-80 painted red, and P-110 painted white.The mechanical properties of the three long round buckle oil casings are mainly hydrostatic pressure test, flattening test, sulfide stress corrosion cracking test, hardness test, tensile test and transverse impact test. Where the geological conditions are complex, the casing is also required to have anti-collapse properties. The oblong thread has the advantages of easy processing, good sealing, certain connection strength, simple on-site maintenance and use, and low price. It is widely used in casing connection.
http://www.xysteelpipe.com/info/Large-Diameter-J55-Long-Round-Buckle-Oil-Casing-Pipe-1693-1.htm
Key points of processing technology for large diameter straight seam steel pipe
Rebar thread processing
1. The thread head, tooth shape and pitch of the processed steel thread are consistent with the tooth shape and pitch of the connecting sleeve, and they are qualified by the matching gauge.
2. When processing steel thread, water-soluble cutting lubricant should be used; when the temperature is lower than 0℃, sodium nitrite should be mixed, and engine oil should not be used as lubricating fluid or threaded without lubricating fluid.
3. The operator should check the appearance of the steel wire head one by one and make the operator mark.
4. After the self-inspection of the steel wire head, 10% of each specification should be randomly checked, and no less than 10, if one is not qualified, the batch of processed products should be fully inspected. The unqualified silk heads should be reprocessed and used after passing the inspection again.
5. The silk heads that have passed the inspection shall be protected, put on protective caps, and be neatly classified according to specifications for use.
http://www.xysteelpipe.com/info/Key-points-of-processing-technology-for-large-diameter-straight-seam-steel-pipe-1692-1.htm
1. The thread head, tooth shape and pitch of the processed steel thread are consistent with the tooth shape and pitch of the connecting sleeve, and they are qualified by the matching gauge.
2. When processing steel thread, water-soluble cutting lubricant should be used; when the temperature is lower than 0℃, sodium nitrite should be mixed, and engine oil should not be used as lubricating fluid or threaded without lubricating fluid.
3. The operator should check the appearance of the steel wire head one by one and make the operator mark.
4. After the self-inspection of the steel wire head, 10% of each specification should be randomly checked, and no less than 10, if one is not qualified, the batch of processed products should be fully inspected. The unqualified silk heads should be reprocessed and used after passing the inspection again.
5. The silk heads that have passed the inspection shall be protected, put on protective caps, and be neatly classified according to specifications for use.
http://www.xysteelpipe.com/info/Key-points-of-processing-technology-for-large-diameter-straight-seam-steel-pipe-1692-1.htm
2020年6月18日星期四
Anticorrosive Spiral Steel Tube
The anticorrosive spiral steel pipe(SSAW) is mainly used for anticorrosion of the external walls of buried or underwater steel oil, gas, water, and heating pipelines, and is also suitable for various types of steel structures, docks, ships, sluices, gas storage tanks, and oil refinery plant equipment. Anti-corrosion and waterproof and anti-leakage for concrete pipes, sewage tanks, roof waterproof layer, toilets, basements and other concrete structures.
Anticorrosive medium of anticorrosive spiral steel pipe:
There are many types of corrosion media in IPN8710 anticorrosive spiral steel pipe, including acid, alkali, salt, oxidant and water vapor. The coating must be chemically inert and resistant to acid, alkali and salt corrosion. , Tough and plump.
1. IPN8710 anticorrosive spiral steel pipe primer: It is composed of polyurethane polyethylene, modified epoxy resin, non-toxic anti-rust pigment filler, additives, etc. It is cured at room temperature to form an interpenetrating network, the coating film structure is dense, acid, alkali, Salt, excellent anti-rust performance, strong adhesion.
2. IPN8710 anticorrosive spiral steel pipe topcoat: It is composed of epoxy resin, rubber resin modified, non-toxic antirust paint, additives, etc. Excellent chemical resistance, non-toxic, anti-microbial erosion.
Four advantages of anti-corrosion steel pipes in practical applications:
1. The construction is simple and the steps are quick, and the construction can be carried out in the factory and on site. Compared with old steel pipes, the construction of anti-corrosion steel pipes is very simple. No need for large equipment and space. On-site operation is very suitable. Anti-corrosion treatment can be carried out at the same time during on-site construction.
2. In the case of combining the quality and service life of the steel pipe, the service life and investment can reach a reasonable ratio, which is more economical and more applicable than the old pipeline, which is also an important deciding factor for people to buy.
3. Long service life, ordinary steel tubes have a certain service life. After the anticorrosion treatment of common materials, its service life can be as long as 20-30 years or even longer, thereby saving the cost of replacement and other uses.
4. The design of anti-corrosion steel pipes is centered on environmental protection. In today's environment-friendly environment, this design is more in line with the needs of the times. In the future, the environmental protection requirements for the pipelines that transport fluids will become increasingly strict. Products that cannot be developed on behalf of the environment will be eliminated.
Hardness index of anticorrosive spiral steel pipe:
The ability of a metal material to resist a hard object from crushing a surface is called hardness. According to different test methods and application scope, hardness can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, micro hardness and high temperature hardness. Brinell, Rockwell, and Vickers hardness are commonly used for corrosion-resistant spiral steel pipes.
A. Brinell hardness (HB Use a certain diameter steel ball or cemented carbide ball, press into the sample surface with the specified test force (F), remove the test force after the specified holding time, and measure the indentation diameter of the sample surface (L) The Brinell hardness value is the quotient obtained by dividing the test force by the indented spherical surface area.
B. Rockwell hardness (HK) The Rockwell hardness test is the same as the Brinell hardness test, and is an indentation test method. The difference is that it measures the depth of the indentation. That is, under the effect of the initial Yong test force (Fo) and the total test force (F), press the indenter (cone or steel ball of the steel plant) into the surface of the sample, and after the specified holding time, remove the main For the test force, use the measured residual indentation depth increment (e) to calculate the hardness value.
C. Vickers hardness (HV) The Vickers hardness test is also an indentation test method, which is to press a regular quadrangular pyramid diamond indenter with an opposing angle of 1360 into the test surface with a selected test force (F). After the specified holding time, remove the test force and measure the length of the two diagonal lines of the indentation. The Vickers hardness value is the quotient obtained by dividing the test force by the indentation surface area. The calculation formula is: HV--Vickers hardness symbol, N/mm2 (MPa); F--test force, N; d--pressure The arithmetic mean of the two diagonals of the mark, mm. The test force F used for Vickers hardness is 5 (49.03), 10 (98.07), 20 (196.1), 30 (294.2), 50(490.3), 100 (980.7) Kgf (N) and other six levels, the measurable hardness degree value range is 5 ~ 1000HV.
http://www.xysteelpipe.com/info/Anticorrosive-Spiral-Steel-Tube-1691-1.htm
Anticorrosive medium of anticorrosive spiral steel pipe:
There are many types of corrosion media in IPN8710 anticorrosive spiral steel pipe, including acid, alkali, salt, oxidant and water vapor. The coating must be chemically inert and resistant to acid, alkali and salt corrosion. , Tough and plump.
1. IPN8710 anticorrosive spiral steel pipe primer: It is composed of polyurethane polyethylene, modified epoxy resin, non-toxic anti-rust pigment filler, additives, etc. It is cured at room temperature to form an interpenetrating network, the coating film structure is dense, acid, alkali, Salt, excellent anti-rust performance, strong adhesion.
2. IPN8710 anticorrosive spiral steel pipe topcoat: It is composed of epoxy resin, rubber resin modified, non-toxic antirust paint, additives, etc. Excellent chemical resistance, non-toxic, anti-microbial erosion.
Four advantages of anti-corrosion steel pipes in practical applications:
1. The construction is simple and the steps are quick, and the construction can be carried out in the factory and on site. Compared with old steel pipes, the construction of anti-corrosion steel pipes is very simple. No need for large equipment and space. On-site operation is very suitable. Anti-corrosion treatment can be carried out at the same time during on-site construction.
2. In the case of combining the quality and service life of the steel pipe, the service life and investment can reach a reasonable ratio, which is more economical and more applicable than the old pipeline, which is also an important deciding factor for people to buy.
3. Long service life, ordinary steel tubes have a certain service life. After the anticorrosion treatment of common materials, its service life can be as long as 20-30 years or even longer, thereby saving the cost of replacement and other uses.
4. The design of anti-corrosion steel pipes is centered on environmental protection. In today's environment-friendly environment, this design is more in line with the needs of the times. In the future, the environmental protection requirements for the pipelines that transport fluids will become increasingly strict. Products that cannot be developed on behalf of the environment will be eliminated.
Hardness index of anticorrosive spiral steel pipe:
The ability of a metal material to resist a hard object from crushing a surface is called hardness. According to different test methods and application scope, hardness can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, micro hardness and high temperature hardness. Brinell, Rockwell, and Vickers hardness are commonly used for corrosion-resistant spiral steel pipes.
A. Brinell hardness (HB Use a certain diameter steel ball or cemented carbide ball, press into the sample surface with the specified test force (F), remove the test force after the specified holding time, and measure the indentation diameter of the sample surface (L) The Brinell hardness value is the quotient obtained by dividing the test force by the indented spherical surface area.
B. Rockwell hardness (HK) The Rockwell hardness test is the same as the Brinell hardness test, and is an indentation test method. The difference is that it measures the depth of the indentation. That is, under the effect of the initial Yong test force (Fo) and the total test force (F), press the indenter (cone or steel ball of the steel plant) into the surface of the sample, and after the specified holding time, remove the main For the test force, use the measured residual indentation depth increment (e) to calculate the hardness value.
C. Vickers hardness (HV) The Vickers hardness test is also an indentation test method, which is to press a regular quadrangular pyramid diamond indenter with an opposing angle of 1360 into the test surface with a selected test force (F). After the specified holding time, remove the test force and measure the length of the two diagonal lines of the indentation. The Vickers hardness value is the quotient obtained by dividing the test force by the indentation surface area. The calculation formula is: HV--Vickers hardness symbol, N/mm2 (MPa); F--test force, N; d--pressure The arithmetic mean of the two diagonals of the mark, mm. The test force F used for Vickers hardness is 5 (49.03), 10 (98.07), 20 (196.1), 30 (294.2), 50(490.3), 100 (980.7) Kgf (N) and other six levels, the measurable hardness degree value range is 5 ~ 1000HV.
http://www.xysteelpipe.com/info/Anticorrosive-Spiral-Steel-Tube-1691-1.htm
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