GB / T 9711.2 yog ib qho tseem ceeb hauv Suav teb tus qauv rau Spiral Submerged Arc Welded (SSAW) kav, tshwj xeeb txhais cov kev cai rauPSL 2 (Product Specification Level 2)Qib cov kav dej siv nyob rau hauv siab -xav tau roj av thiab cov nkev xa hluav taws xob [citation:1, citation:5, citation:6].
Nws yog ib qho tseem ceeb kom nkag siab tias GB / T 9711.2 tsis yog cov ntaub ntawv nyob ib leeg. Nws yuav tsum tau siv ua ke nrogGB/T 9711.1(Cov Kev Xav Tau Tshwj Xeeb) los ua kom tiav cov lus qhia rau PSL 2 SSAW kav . Qhov kev xaiv "Part 2" keeb kwm sib raug rau "B-level" lossis PSL 2 zoo, uas muaj cov kev cai nruj dua li Tshooj 1 (PSL 1/A-level) [citation:1, citation:5].
📋 GB/T 9711.2 Standard Overview
Cov lus hauv qab no qhia txog cov ntsiab lus tseem ceeb ntawm GB / T 9711.2 rau kauv submerged arc welded kav [citation: 1, citation: 5, citation: 6, citation: 8, citation: 9].
| Yam ntxwv | Kev piav qhia |
|---|---|
| Standard Number | GB/T 9711.2(Tag nrho lub npe: "Petroleum and natural gas industries - Steel pipelines - Technical delivery conditions - Part 2: Pipes of requirement class PSL 2"). |
| Lub Npe | 9711.2螺旋钢管 (9711.2 kauv steel yeeb nkab) [citation:3, citation:7]. |
| Qib zoo | PSL 2 (Product Specification Level 2)- Sawv cev rau qib siab dua nrog cov kev xav tau zoo dua qub piv rau PSL 1 . |
| Daim ntawv thov | Cov kev pabcuam tseem ceeb hauv kev lag luam roj av thiab cov nkev roj rau kev thauj cov nplaim taws thiab tsis yog - cov kua hluav taws xob [citation:1, citation:7]. |
| Qib Steel | L245, L290, L320, L360, L390, L415, L450, L485, L555thiab qib nruab nrab. Kuj sib npaug rau API 5L qib X42 txog X80 [citation:3, citation:7]. |
| Kev tsim khoom | Spiral Submerged Arc Vuam (SSAW/HSAW)- Tsim los ntawm kub- dov steel sawb ntawm chav tsev kub siv tsis siv neeg ob npaug -sided submerged arc vuam [citation:3, citation:7]. |
| Tej kev siv | Siab - cov roj thiab cov kav xa hluav taws xob siab; conveying combustible thiab non-combustible fluids; kev siv tseem ceeb hauv kev lag luam; steel qauv xav tau kev ntseeg siab. |
🔍 PSL 2: Txhim Kho Cov Kev Xav Tau Zoo
Cov lus hauv qab no qhia txog qhov sib txawv tseem ceeb ntawm PSL 2 thiab PSL 1 rau SSAW kav [citation: 1, citation: 6]:
| Kev xav tau | PSL 1 | PSL 2 | Kev cuam tshuam rau SSAW |
|---|---|---|---|
| Tshuaj Tswj | Txheem txwv | Tighter txwv(C Tsawg dua lossis sib npaug rau 0.18%, S Tsawg dua lossis sib npaug rau 0.010%) | Zoo dua weldability thiab HIC kuj |
| Yuav tsum muaj zog | Yam tsawg kawg nkaus xwb | Yam tsawg kawg thiab siab kawgqhia | Tiv thaiv tshaj - cov ntaub ntawv muaj zog |
| Kev ntsuam xyuas cuam tshuam | Tsis yuam | Yuav tsum taurau weld, HAZ, thiab lub hauv paus hlau | Guarantee qis -kub toughness |
| NDT Requirements | Txuj | 100% kev tshuaj ntsuam xyuas(RT, UAS) | Ua kom muaj kev ncaj ncees ntawm weld |
| Hydrostatic Test | 90% SMYS | 95% SMYSnrog ntev tuav lub sij hawm | Kev ntsuas siab dua |
| Traceability | Batch qib | Pipe -los ntawm -pipetag nrho traceability | Ua kom tiav cov ntaub ntawv zoo |
📊 Chemical Composition & Mechanical Properties
Table 4: PSL 2 Chemical Requirements for SSAW
| Element | Ntau tshaj % | Xeem zaus | Notes for SSAW |
|---|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.18 | Txhua qhov kub | Tsawg dua rau weldability zoo dua |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.010 | Txhua qhov kub | Tseem ceeb rau HIC tsis kam |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.020 | Txhua qhov kub | Txhim kho toughness |
| Carbon sib npaug (CE) | Cov neeg siv khoom tau teev tseg | Txhua qhov kub | Tswj weld cracking |
Table 6: Yam Yuav Tsum Tau Ua Kev Ntsuas (PSL 2)
| Qib | Kev ntsuas kub | Yam tsawg kawg nkaus | Qhov chaw piv txwv |
|---|---|---|---|
| L245 NIB | -10 degree | 27J | Weld & HAZ |
| L360 NIB | -10 degree | 40J | Weld & HAZ |
| L415 NIB | -10 degree | 45J | Weld & HAZ |
| L450 NIB | -10 degree | 50J | Weld & HAZ |
| l485 wb | -10 degree | 60J | Weld & HAZ |
🔧 Kev Tsim Khoom Txheej Txheem rau GB / T 9711.2 SSAW Yeeb Nkab
Cov txheej txheem tsim khoom ua raws li nruj PSL 2 kev tswj hwm zoo [citation: 6, citation: 7]:
| Kauj ruam | Kev piav qhia |
|---|---|
| 1. Kev npaj cov khoom nyoos | Kub- dov steel coils ntsib PSL 2 chemistry yuav tsum tau ua kom qib, tshuaj xyuas, thiab ntug-milled.Txhua phaj / coil qhia tus kheejrau tag nrho traceability. |
| 2. Txias txoj kev | Cov hlau sawb txuas ntxiv tsim rau hauv cov duab cylindrical ntawm lub kaum ntse ntse tshwj xeeb ntawm chav tsev kub [citation: 3, citation: 7]. |
| 3. Submerged Arc Vuam | Muab ob npaug rau-sided tsis siv neeg submerged arc vuam (sab hauv thiab sab nraud) tsim cov kauv seam nrog kev nkag mus rau tag nrho. Cov txheej txheem vuam yuav tsum yogtsim nyog . |
| 4. Tsis yog-Kev kuaj kev puas tsuaj | 100% radiographic (RT) thiab / lossis ultrasonic (UT) kev tshuaj xyuasntawm tag nrho weld ntev. Cov txheej txheem lees txais tsis raug raug txiav txim siab nruj. |
| 5. Kev Ntsuas Hydrostatic | Txhua cov yeeb nkab tau sim ntawm95% SMYSrau ntau dua lossis sib npaug li 30 vib nas this nrog siab - lub sijhawm kaw . |
| 6. Kev kuaj xyuas tshuab | Tensile tests, flattening tests, thiabyuav tsum tau Charpy impact testntawm weld, HAZ, thiab lub hauv paus hlau. |
| 7. Kev ua tiav tiav | Beveled xaus (30℃± 2.5 degree) npaj rau ib qho tshwj xeeb. Xaus kev tiv thaiv nrog lub kaus mom yas. |
| 8. Cov ntaub ntawv zoo | Cov ntaub ntawv nthuav dav suav nrogMill Certificate Hom 3.1nrog tag nrho cov qhabnias xeem thiab traceability cov ntaub ntawv. |
📏 Dimensional Tolerances (PSL 2)
GB/T 9711.2 qhianruj tolerancestshaj PSL 1 rau SSAW kav:
| Parameter | Ua siab ntev | Kev ntsuas ntsuas |
|---|---|---|
| Sab nraud txoj kab uas hla | ± 0.5% lossis ± 3mm | Daim kab xev voj voog, txhua lub yeeb nkab |
| Phab ntsa Thickness | +10% / -5% | Ultrasonic ntsuas, 4 ntsiab lus rau ib lub yeeb nkab |
| Ovality | Tsawg dua lossis sib npaug li 1.0% ntawm OD | Max -min Diameter ntsuas |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.15% ntawm qhov ntev | Ncaj ntug ntsuas |
| Weld Reinforcement (Internal) | 0-2.5 hli | Visual thiab ntsuas ntsuas |
| Weld Reinforcement (sab nraud) | 0-3.0 hli | Visual thiab ntsuas ntsuas |
🏭 Daim Ntawv Thov thiab Kev Xaiv Qib
GB/T 9711.2 SSAW kavyog siv rau hauv cov ntawv tseem ceeb uas muaj kev ntseeg siab yog qhov tseem ceeb [citation:6, citation:7]:
| Daim ntawv thov | Cov qib pom zoo | Cov Lus Qhia Tseem Ceeb |
|---|---|---|
| Siab -Hloov Gas Transmission | L360NB, L415NB, L450NB | Guaranteed cuam tshuam toughness ntawm -10 degree |
| Crude Roj Trunk Kab | L360, L415 | 100% NDT, nruj chemistry tswj |
| Offshore Pipelines | L450NB, L485NB | Txhim kho toughness, HIC kuj |
| Sour Service | L245, L290 | Tsawg sulfur (tsawg dua lossis sib npaug li 0.002%), HIC kuaj |
| Tsawg-Kev Pabcuam Kub | L360NB, L415NB | Guaranteed cuam tshuam ntawm -20℃lossis qis dua |
| Compressor Chaw nres tsheb Piping | L360, L415 | Siab -siab ncaj ncees, tag nrho traceability |
📝 Cov ntsiab lus tseem ceeb
Kev sib raug zoo nrog API 5L: GB/T 9711.2 yogtechnically ua raws li API 5L PSL 2 cov cai, ua rau nws haum rau thoob ntiaj teb pipeline tej yaam num [citation:4, citation:8].
Ua kom tiav Specification: Thaum xaj, koj yuav tsum qhia meejGB / T 9711.1 thiab GB / T 9711.2nrog rau qib uas yuav tsum tau muaj (piv txwv li, GB/T 9711.1 + GB/T 9711.2, Qib L415NB, SSAW, Loj (OD x WT), Length, End Finish).
Cov ntaub ntawv xav tau: PSL 2 yuav tsum muaj cov ntaub ntawv nthuav dav suav nrog:
Mill Certificate Type 3.1 nrog tag nrho cov txiaj ntsig kev xeem
NDT cov ntaub ntawv (RT films, UT scans)
Cov kab kos kev kho cua sov
Hydrostatic test siab-time charts
Tag nrho traceability los ntawm tshav kub mus rau cov yeeb nkab
Sour Service Option: Rau H₂S- muaj ib puag ncig, qhia cov kev xav tau ntxiv nrog rau kev sim HIC rau NACE TM0284 thiab SSC xeem rau NACE TM0177 .
Weld Repair txwv: PSL 2 tso cai siab tshaj plaws2 kev kho rau ib qho weldnrog kev txwv nruj ntawm kev kho qhov ntev. Txhua qhov kev kho yuav tsum tau rov- tshuaj xyuas .
Txheej txheej xaiv: Cov kav dej tuaj yeem muab tau nrog ntau yam kev tiv thaiv corrosion:
3LPE (3-txheej polyethylene)
FBE (Fusion Bonded Epoxy)
Coal Tar Epoxy
📝 Cov ntsiab lus
GB/T 9711.2 Kauv Submerged Arc Welded kavsawv cev rauTxhim kho qib zoo (PSL 2)rau cov roj thiab cov kav xa hluav taws xob, nrog cov kev cai nruj dua li PSL 1 [citation: 1, citation: 5, citation: 6]. Cov qauv no qhia meejCov tshuaj tiv thaiv nruj dua, yuav tsum tau kuaj qhov cuam tshuam, 100% NDT, txhim kho hydrostatic kuaj, thiab ua tiav cov yeeb nkab- los ntawm - yeeb nkab traceability .
Muaj nyob rau hauv qib los ntawmL245 to L555, cov kav dej no yog tsim los sivob -sided tsis siv neeg submerged arc vuamlos ntawm kub- dov steel coils, nrog diameters los ntawm219mm txog 4000mm[siv: 7, 9]. Tus qauv yogtechnically ua raws li API 5L PSL 2, kom ntseeg tau tias kev sib raug zoo thoob ntiaj teb [citation:4, citation:8].
Thaum qhia meej, nco ntsoov qhov ntawdGB / T 9711.2 yuav tsum tau siv ua ke nrog GB / T 9711.1los ua ib tug ua tiav specification. Cov kav dej no yog qhov tseem ceeb rausiab- siab kis tau tus mob gas, crude roj trunk kab, offshore pipelines, qaub kev pab cuam, thiab tsawg- daim ntaub ntawv kubqhov twg qhov kev ntseeg siab tshaj plaws thiab kev nyab xeeb yuav tsum tau [citation:6, citation:7].
