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    • Along with the years of entrepreneurial journey of Zhongyuan people, she gradually formed her own spiritual pillar and behavioral norms. In the silent inheritance, she guided Zhongyuan Company towards a more brilliant tomorrow.

    Popular products： SSAW SAWH Steel pipe pile Welded pipe TPEP 3PE PP FBE HCPE CHINA PIPE
    Anti-corrosion Pipe The company can produce steel pipes: φ219mm~3260mm steel pipes and anti-corrosion steel pipes, with an annual output value of 1 million tons and anti-corrosion of 1.6 million square meters.
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    2LPE anti-corrosion steel pipe

    2LPE anti-corrosion steel pipe is a type of steel pipe with anti-corrosion function. Its anti-corrosion structure consists of two layers, the first layer is adhesive and the second layer is polyethylene, which are integrated into one material.

    keyword 2LPE anti-corrosion steel pipe Category Anti-coating pipe name Related products Get a quote
    Product details

    2LPE anti-corrosion steel pipe

    Definition and Structure

    2LPE anti-corrosion steel pipe is a type of steel pipe with anti-corrosion function. Its anti-corrosion structure consists of two layers, the first layer is adhesive and the second layer is polyethylene, which are integrated into one material.

    advantage

    High sealing performance: Pipelines have relatively high sealing performance, and long-term operation can greatly save energy, reduce costs, and protect the environment.

    High anti-corrosion reliability: It also has the characteristics of high epoxy strength, low water absorption of PE, and good softness of hot melt adhesive, with high anti-corrosion reliability.

    Comparison with 3PE anti-corrosion steel pipe

    common ground

    The two-layer structure of 2PE anti-corrosion pipeline is similar to the last two layers of 3PE anti-corrosion steel pipe, and the thickness of each layer is also the same as that of three-layer PE.

     

    difference

    The 3PE anti-corrosion steel pipe has an additional layer of epoxy powder, which has good corrosion resistance, mechanical properties, and strong resistance to cathodic stripping.

     

    application and development

    Application areas: commonly used in oil and gas extraction, firefighting pipelines, and other fields.

    Development value: The use of coated steel pipes (including 2PE anti-corrosion steel pipes) is an important existence that requires more diverse development and application. It plays an important role in pipeline anti-corrosion, can improve the service life of pipelines, and reduce maintenance costs.

     

     

    (Note: Parameters may be adjusted due to engineering requirements;)

     

     

     2PE防腐钢管.jpg


    ZHONGYUAN Pipeline-Because we are a factory, we produce it ourselves

    Bring your own price to negotiate cooperation: ensure successful implementation of cooperation.
    Product Name 2LPE anti-corrosion steel pipe
    Pipe Type SSAW steel Pipe,SAWH Pipe, Pipe Pile, Spirally Submerged Arc Welding Pipe ,Sprial Steel Pipe,Piling Structure SSAW Pipe
    Specification Outer diameter:219mm-4064mm
    Wall thickness 3.2mm-50.8mm
    LENGTH 5.8/6/11.8/12/18/32~80meters
    EXPEROENCE 30th/Industry service experience
    CAPACITY With an annual production capacity of 1.0 million Tons steel pipes and 1.6 million square meters anticorrosion coating pipes
    Company area Covering an area of 865,800 square meters and a construction area of 545,000 square meters.
    Corporate assets It has a total asset of RMB 1.1 billion and 980 staffs.
    Production line Having 13 advanced steel pipe production lines
    Two: Three layer polyolefin (PE, PP) coating production line
    Two: Internal and external liquid epoxy anti-corrosion coating production lines
    Two: internal and external FBE production lines.
    The company has its own CNAS laboratory

    Where do you want to go, click to go

    Our Certificate
    TUV-ISO 9001:2015 PED TN/AD2000 PED-2014/68/EU (Pressure Equipment Directive) API Q1 CQM-ISO 9001:2015 CQM-ISO 14001:2015 CQM-ISO 45001:2018 API Spec 5L IQNET-ISO 9001:2015 IQNET-ISO 14001:2015 IQNET-ISO 45001:2018 PED AD2000 CQM-HSE CNAS CNAS（Chinese） TS（A/B级）Special Equipment GB/T 19001-2016 GB/T 24001-2016 GB/T 45001-2020 BUSINESS Work Safety Standardization Manufacture License of Anti-corrosion Piping Components Drinking water safety productsDN150~DN3200 Drinking water safety productsDN150~DN3600 China Corrosion Control Qualifieation Certifieate China Corrosion Control Qualifieation Certifieate China Corrosion Control Safety Certifieate Pressure pipeline components 3LPE/2LPE China Corrosion Control Technology Association Pressure pipeline components LE(within) Pressure pipeline components X80 Pressure pipeline components FBE(within) Type test report X80 Pressure pipeline components FBE（outside） Type test report 3LPE（outside） Type test report LE（within） Type test report FBE（within） Type test report FBE（outside） HSSE PED-CERTIFICATE PED-ZERTIFIKAT EAC DOC GOST -R CE-CPR UKCA RoHS REACH

    Steel pipe name

    SSAW STEEL PIPE SAWH STEEL PIPE SPIRAL STEEL PIPE SPIRAL WELDED PIPE SAW STEEL PIPE SSAW PIPE SAWH PIPE Spirally Submerged Arc Welding Pipe WELDED STEEL PIPE Spiral Submerged-arc Welded LINE PIPE Piling Structure SSAW Pipe Large Diameter Heavy Section Steel Tube SAW Pipes SSAW Carbon steel pipe BUSHING PIPE Thick Wall Steel Pipe Submerged arc welded steel pipe SSAW STEEL PIPE PILE Large Diameter Steel Pipe SAWH SAW DIN EN 10204-3.1 PIPE

    Steel pipe process

    Spiral seam submerged arc welding steel pipe process flow chart Raw material coil loading 3620mm spiral steel pipe unit (partial) Steel pipe forming process Steel pipe forming process Steel pipe forming process Steel pipe cutting process Steel pipe under pipe trolley Steel pipe gantry automatic welding machine Steel pipe end grinding machine Steel tube X-ray industrial television X-ray inspection of steel pipes Steel pipe mobile tube end X-ray imaging lead room Steel pipe end expansion machine During the water pressure test of steel pipes Steel pipe water pressure test Offline ultrasonic testing machine for steel pipes Steel pipe flat head chamfering machine Steel pipe flat head chamfering work End of steel pipe flat head chamfering Finished steel pipe inspection Steel pipe identification storage

    Steel pipe standards

    API-5L API SPEC 5L PSL1 API SPEC 5L PSL2 API 5CT EN10217 BS EN10217-1 BS EN10217-2 BS EN10217-5 BS EN10219-1 BS EN10219-2 GB/T 9711 ​GB/T 9711.1 GB/T 9711.2 GB/T 3091 SY/T 5037 ASTM A252 ASTM A53 CJ/T 3022 GB/T 13793 GB/T 14291 IS : 1978 IS: 3589 SY/T 5040 ASTM A139 ASTM A671 ASME B36.10M ASTM A252 ISO 3183 NACE MR0175 API SPEC 5LCP API 2B API 5LC ISO 15156 ISO 9330 ISO 4200 ISO 2604-6 ISO 9765 ISO 559 DEP 31.40.20.37 TOTAL GS EP PLR 201 CSA Z245-1 KOC-MS-001 PT.1 REV.2 KOC-MS-018 DNV-OS-F101 AWWA C200 EN 11960 EN 10224 EN 10225 DIN 2458 DIN 2460 DIN 2470-1/2 EN 10219 GOST 20295 ГОСТ Р 52079 AS 4041 AS 1579 MSZ 3741 MSZ 3770 EN 10208-2 CSA Z245.1 BS 534

    Steel pipe material

    API 5L Grade B API 5L Grade X42 API 5L Grade X46 API 5L Grade X52 API 5L Grade X56 API 5L Grade X60 API 5L Grade X65 API 5L Grade X70 API 5L Grade X80 API 5L Grade X90 API 5L Grade X100 EN10025 EN 10204 - 3.1 EN10217-1:P265TR2 EN10217-1:P265TR1 EN10217-1:P235TR2 EN10217-1:P235TR1 EN10217-1:P195TR2 EN10217-1:P195TR1 EN10217-2:P265GH EN10217-2:P235GH EN10217-2：P195GH EN10217-5：P265GH EN10217-5:P235GH EN10219-1:S355K2H EN10219-1:S355J2H EN10219-1:S355JOH EN10219-1:S275J2H EN10219-1:S275JOH EN10219-1:S235JRH API 5L PSL1 Grade A API 5L PSL1 B API 5L PSL1 X42 API 5L PSL1 X46 API 5L PSL1 X52 API 5L PSL1 X56 API 5L PSL1 X60 API 5L PSL1 X65 API 5L PSL1 X70 API 5L PSL1 X80 API 5L PSL1 X90 API 5L PSL1 X100 API 5L PSL1 L245 API 5L PSL1 L320 API 5L PSL1 L290 API 5L PSL1 L360 API 5L PSL1 L390 API 5L PSL1 L415 API 5L PSL1 L450 API 5L PSL1 L485 API 5L PSL1 L555 API 5L PSL1 L625 API 5L PSL1 L690 API 5L PSL2 BM API 5L PSL2 X42M API 5L PSL2 X46M API 5L PSL2 X52M API 5L PSL2 X56M API 5L PSL2 X60M API 5L PSL2 X65M API 5L PSL2 X70M API 5L PSL2 X80M API 5L PSL2 X90M API 5L PSL2 X100M API 5L PSL2 L245M API 5L PSL2 L290M API 5L PSL2 L320M API 5L PSL2 L360M API 5L PSL2 L390M API 5L PSL2 L415M API 5L PSL2 L450M API 5L PSL2 L485M API 5L PSL2 L555M API 5L PSL2 L625M API 5L PSL2 L690M GOST 20295-K52 GOST 20295-K34 GOST 20295-K56 GOST 20295-K60 GOST 20295-K65 GOST 20295-K70 GOST 20295-K80 ГОСТ 1050 ГOCT 380 PSL2 PSL1 ASTM A671 CA55 ASTM A671 CB60 ASTM A671 CB65 ASTM A671 CB70 ASTM A671 CC60 Q235B ASTM A671 CC65 Q355B ASTM A671 CC70 Q355C A285/A285M GrC Q355D A515/A515M Gr60 A515/A515M Gr65 A515/A515M Gr70 A516/A516M Gr60 A516/A516M Gr65 A516/A516M Gr70 USt 37.0-1.0253 St 37.0-1.0254 St 44.0-1.0256 St 52.0-1.0421 St 52-3：1.0570 St 35.8/I-1.0305 St 35.8/III-1.0305 St 45.8/I-1.0405 St 45.8/III-1.0405 ASTM A53 Grade B ASTM A53 Grade A ASTM A106 Grade A ASTM A106 Grade B ASTM A333 Grade 1 ASTM A333 Grade 3 ASTM A333 Grade 4 ASTM A333 Grade 6 ASTM A333 Grade 7 ASTM A333 Grade 8 ASTM A333 Grade 9 ASTM A333 Grade 10 ASTM A333 Grade 11 Q355NE A36 Q355ND Q345R AB/A Q550D Q460C Q460NC S355JR RINA-AH36 S355NL SM520B RINA-AH36Z25 Q345qD Q355NB GB/T 700 GB/T 1591 S355JR S355J0 GB/T9711 PSL1 B GB/T9711 PSL1 X42 GB/T9711 PSL1 X52 GB/T9711 PSL1 X56 GB/T9711 PSL1 X60 GB/T9711 PSL1 X65 GB/T9711 PSL1 X70 GB/T9711 PSL1 X80 GB/T9711 PSL1 X90 GB/T9711 PSL1 X100 GB/T9711 PSL1 L245 GB/T9711 PSL1 L290 GB/T9711 PSL1 L360 GB/T9711 PSL1 L390 GB/T9711 PSL1 L415 GB/T9711 PSL1 L450 ​GB/T9711 PSL1 L485 GB/T9711 PSL1 L555 GB/T9711 PSL1 L625 GB/T9711 PSL1 L690 GB/T9711 PSL2 BM GB/T9711 PSL2 X42M GB/T9711 PSL2 X52M GB/T9711 PSL2 X56M GB/T9711 PSL2 X60M GB/T9711 PSL2 X65M GB/T9711 PSL2 X70M GB/T9711 PSL2 X80M GB/T9711 PSL2 X90M GB/T9711 PSL2 X100M GB/T9711 PSL2 L245M GB/T9711 PSL2 L290M GB/T9711 PSL2 L360M GB/T9711 PSL2 L390M GB/T9711 PSL2 L415M GB/T9711 PSL2 L450M GB/T9711 PSL2 L485M GB/T9711 PSL2 L555M GB/T9711 PSL2 L625M GB/T9711 PSL2 L690M ASTM A252 Grade 1 ASTM A252 Grade 2 ASTM A252 Grade 3 STP 275(SKK 400) STP 355(SKK 490) STP 380(SKK 500) STP 450(SKK 590) STP 550

    Other

    Hot rolled steel coil - coil steel in stock EFW electric fusion welded straight seam steel pipe LSAW Longitudinally Submerged Arc Welding ERW Electric Resistance Welding ODF straight seam submerged arc welded pipe SAWL Longitudinally Submerged Arc Welding Seamless Steel Pipe JCOE straight seam double-sided submerged arc welded pipe (bent forming) JCOE straight seam double-sided submerged arc welded pipe (formed by rotary bending) COE straight seam high-frequency and straight seam double-sided submerged arc welded pipes Three roll forming large-diameter circumferential welded pipe DSAW Pipe HFI high-frequency induction welded pipe UOE longitudinally welded steel pipe SAW submerged arc welded steel pipe Pipe Fittings

    Steel pipe pile

    Steel pipe piles for marine pile driving Pile steel pipes for bridge construction Pile driving pipes for dock construction Closed pipe pile steel pipe Spiral welded steel pipes for SY/T 5040 piles ASTM A252 steel cylindrical pipe pile Steel pipe piles for load-bearing components Steel pipe piles for pouring concrete pile formwork Steel pipe pile - supporting pipe - pipe pile steel Cylindrical steel pipe pile High strength and high-precision steel pile pipe Pile pipes of various lengths/inspections are available

    Steel pipe quality

    Main equipment and performance Main testing equipment for steel pipes Quality control measures Manufacturing process monitoring CNAS Laboratory Equipment Archive Catalog CNAS laboratory accredited testing capability range Laboratory Scene Picture

    Anti-coating pipe name

    2LPE anti-corrosion steel pipe 3PE anti-corrosion steel pipe 3LPE anti-corrosion steel pipe PP anti-corrosion steel pipe FBE anti-corrosion steel pipe TPEP anti-corrosion steel pipe HCPE anti-corrosion steel pipe IPN 8710 anti-corrosion steel pipe PE polyethylene spray anti-corrosion steel pipe EP epoxy resin internal and external spray anti-corrosion steel pipe 3PP polypropylene anti-corrosion steel pipe Reinforced 3PE anti-corrosion steel pipe Polyethylene coated anti-corrosion steel pipe Epoxy powder anti-corrosion steel pipe Epoxy coal tar anti-corrosion steel pipe Internal and external liquid epoxy anti-corrosion steel pipes Steel plastic composite structure anti-corrosion steel pipe Liquid epoxy resin coating anti-corrosion steel pipe Solvent free epoxy resin anti-corrosion steel pipe Epoxy zinc rich anti-corrosion steel pipe Polyurethane anti-corrosion steel pipe High chlorinated polyethylene heavy-duty anti-corrosion steel pipe Organic silicon high temperature and anti-corrosion steel pipe Solvent free epoxy coating anti-corrosion steel pipe Anti corrosion steel pipe with waterborne epoxy coating Coated composite anti-corrosion steel pipe GZ-2 new polymer anti-corrosion coating for anti-corrosion steel pipes Cement mortar lined anti-corrosion steel pipe

    Anti-coating pipe process

    3PE anti-corrosion steel pipe production process flow chart 3PE (PP) anti-corrosion production line (219mm~3620 size) Steel pipe outer wall shot blasting cleaning machine Steel pipe inner wall shot blasting cleaning machine (Steel pipe to be coated) Upper pipe area Intermediate frequency induction heating system (FBE. AD. PE coating area) 3PE (PP) anti-corrosion production line 3PE anti-corrosion production line (FBE. AD. PE coating area) PE extruder 3PE anti-corrosion steel pipe cooling spray room Pipe end anti-corrosion coating beveling machine Anti corrosion curing room 3PE anti-corrosion steel pipe inspection area 3PE anti-corrosion steel pipe (finished product) 3Pe finished steel pipe 3PE anti-corrosion steel pipe finished product inventory Production process flow chart of fusion bonded epoxy powder anti-corrosion steel pipe 406.4mm-3620mm steel pipe inner wall shot blasting cleaning machine 406.4mm-3620mm steel pipe outer wall shot blasting cleaning machine Spraying operation of liquid epoxy coating on the outer wall of steel pipes Spraying operation of liquid epoxy coating on the inner wall of steel pipes Production line for liquid epoxy coating on the inner and outer walls of steel pipes Internal epoxy powder external wall epoxy coal tar anti-corrosion steel pipe finished product

    Anti-coating pipe quality

    Summary of main anti-corrosion testing and inspection equipment List of main equipment for anti-corrosion steel pipes Monitoring requirements for FBE anti-corrosion pipe process Process monitoring requirements for 2PE and 3PE anti-corrosion pipes CNAS Laboratory Equipment Archive Catalog CNAS laboratory accredited testing capability range Laboratory Scene Picture

    Application Area

    Subsea oil and gas pipelines Onshore oil and gas pipelines Pipe pile Water pipeline steel pipe Building steel structure steel column Large components of offshore platforms Mining coalification pipeline Central air conditioning duct steel pipe Refrigeration system pipeline steel pipe High pressure pipeline steel pipe Irrigation system pipeline steel pipe Steel pipes for bridge support frames Spiral steel pipe for municipal pipeline network Long distance thermal pipeline steel pipe Sludge conveying pipeline steel pipe Environmental engineering pipeline steel pipe Shield tunnel supporting steel pipe Underground tunnel pipeline steel pipe Communication pipeline steel pipe Underground comprehensive pipe gallery pipeline steel pipe Sprinkler irrigation/drip irrigation system steel pipe Large scale irrigation area pipeline steel pipe Agricultural irrigation pipeline steel pipe Tunnel support pipeline steel pipe Mine ventilation shaft pipeline steel pipe Ventilation system pipeline steel pipe Tailings conveying pipeline steel pipe Metallurgical pipeline steel pipe Mining pipeline steel pipe Subsea pipeline steel pipe Dock pile foundation pipeline steel pipe Port pipeline steel pipe Pile foundation structure pipeline steel pipe Offshore wind turbine tower tube pipeline steel pipe Wind power foundation pipeline steel pipe Construction structure pipeline steel pipe Bridge pier support pipeline steel pipe Bridge engineering pipeline steel pipe Steel pipe for truss pipeline Giant column pipeline steel pipe Airport terminal pipeline steel pipe Sports venue pipeline steel pipe Building support pipeline steel pipe Structural engineering pipeline steel pipe Process pipeline steel pipe Reactor supporting pipeline steel pipe Refining equipment pipeline steel pipe Slurry pipeline steel pipe Chemical pipeline steel pipe Industrial pipeline steel pipe Auxiliary pipeline steel pipe Nuclear power engineering pipeline steel pipe River dredging project pipeline steel pipe Flood control and drainage pipeline steel pipe Pressure pipeline steel pipe Steam transmission pipeline steel pipe Top pipe construction pipeline steel pipe Connecting oil well pipelines with steel pipes Spiral steel pipe for oil and gas pipelines Spiral steel pipe for drainage pipeline Spiral steel pipe for low-pressure water supply Spiral steel pipe for gas transmission pipeline engineering Spiral steel pipe for water supply and drainage engineering Water supply and transportation pipeline steel pipe Gas long-distance pipeline steel pipe Chimney exhaust pipe steel pipe Sewage treatment plant pipeline steel pipe Spiral steel pipe for water supply and drainage pipeline High pressure water pipeline steel pipe Underwater pipeline steel pipe Oil and gas field development pipeline steel pipe Steel pipe piles for deepwater ports Exhaust gas pipeline steel pipe Seawater circulation system pipeline steel pipe Cooling water delivery pipeline steel pipe Power plant circulating water system pipeline steel pipe Large pump station outlet pipeline steel pipe Hydropower station drainage pipeline steel pipe Hydroelectric power station diversion pipeline steel pipe Reservoir pipeline steel pipe Water conservancy engineering pipeline steel pipe Medium and low pressure gas pipeline network steel pipe Gas distribution pipeline steel pipe Drainage system pipeline steel pipe Rainwater pipe network pipeline steel pipe Drainage system pipeline steel pipe Water supply system pipeline steel pipe Thermal pipeline steel pipe Infrastructure pipeline steel pipe Steel pipe for water supply main channel pipeline High temperature hot water pipeline steel pipe Processing facility pipeline spiral steel pipe Spiral steel pipe for urban water supply pipeline Spiral steel pipe for sewage discharge pipeline Spiral steel pipes for gathering and transportation pipelines Central heating system pipeline steel pipe Subsea oil and gas trunk pipeline steel pipe Steel pipes for onshore oil and gas trunk pipelines Offshore platform structural steel pipe Ocean engineering pipeline steel pipe Ship transportation pipeline steel pipe Petrochemical pipeline steel pipe Electric power industry pipeline steel pipe Integrated power pipeline steel pipe Urban engineering equipment pipeline steel pipe Natural gas transmission long-distance pipeline steel pipe Chemical transportation pipeline steel pipe Oil transportation long-distance pipeline steel pipe API 5L STK400 711.2X16X11800 PIPE Export of Russian national pipeline steel pipes API SPEC 5L SAWH PIPE 3LPE 609.6X11.91X12000 GRADE X70M PSL2 Export Venezuelan National Pipeline Steel Pipe API 5L X60 PSL1 1422X25.4MM Export of pipeline steel pipes to European countries Exporting pipeline steel pipes to Middle Eastern countries Export Kazakhstan National Pipeline Steel Pipe Export Turkmenistan National Pipeline Steel Pipe Export Afghan National Pipeline Steel Pipe Export Australian National Pipeline Steel Pipe Exporting Syrian national pipeline steel pipes Export of Ukrainian national pipeline steel pipes Export Indonesian National Pipeline Steel Pipe Export Norwegian National Pipeline Steel Pipe Export of Bangladesh National Pipeline Steel Pipe Export Saudi Arabia National Pipeline Steel Pipe Export UAE National Pipeline Steel Pipe Export of South Korean National Pipeline Steel Pipe Export Japanese National Pipeline Steel Pipe Export German National Pipeline Steel Pipe Export Singapore National Pipeline Steel Pipe Export Oman National Pipeline Steel Pipe Export Iranian National Pipeline Steel Pipe Export Pakistan National Pipeline Steel Pipe Export Canadian National Pipeline Steel Pipe Export Italian National Pipeline Steel Pipe GB/T9711-2023 L290 PSL1 377X7 SY/T5037-2023 457X9.53X12000 SY/T5037-2023 457X9.53 GB/T23257-2017 3PE SY/T5037-2018 Q235B 508X8X12000 GB/T23257-2017 3PE GB/T9711-2023 PSL1 529X10X12000 Q235B GB/T9711-2023 PSL1 529X8X12000 Q235B SY/T5037-2018 610X10X12000 GB/T23257-2017 3PE SY/T5037-2023 610X10X12000 Q235B SY/T5037-2023 Q235B 610X10X12000 3PE GB/T9711-2023 PSL1 711.2X16X11800 Q235B SY/T5037-2023 813X9.53 GB/T23257-2017 3PE SY/T5037-2018 813X9.53X12000 Q235B SY/T5037-2023 Q235B 820X12 CB/T18593-2001 CJ/T120-2016 GB/T 9711-2023 PSL1 820X10X12000 Q235B GB/T9711-2023 PSL1 820X12X12000 Q235B GB/T3091-2015 820X10X12000 Q235B SY/T5037-2023 1020X10 Q235B SY/T5037-2018 Q235B 1219X11X12000 GB/T23257-2017 3PE SY/T5037-2023 Q235B 1220X12 CB/T18593-2001 CJ/T120-2016 SY/T5037-2023 1220X12 CB/T18593-2001 CJ/T120-2016 SY/T5037-2023 Q235B 1220X14X12000 GB/T3091-2015 1220X18X12000 Q235B GB/T9711-2023 PSL1 1220X20X12000 Q235B GB/T9711-2023 PSL1 1420X20X12000 Q235B GB/T3091-2015 1420X18X6000 Q235B SY/T5037-2018 1524X14.2 Q235B GB/T9711-2017 PSL1 L360M 1620X22X12000 GB/T9711-2017 L360M PSL1 1620X24X11800 GB/T9711-2023 PSL1 1620X23X1320 Q355B GB/T9711-2023 PSL1 2020X16X11500 Q235B SY/T5037-2023 2540X20X12000 Q235B GB/T8163-2018 20# 219.1X8.18 GB/T23257-2017 3PE
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