GB/T 9711.2 Kauv Welded Steel Pipe (SSAW)
Lub ntsiab lus tseem ceeb
GB/T 9711.2yog Suav lub teb chaws tus qauv qhiaPSL 2 (Product Specification Level 2) yuav tsum muajrau steel kav siv nyob rau hauv roj av thiab natural gas pipeline tsheb thauj mus los. Cov qauv no npogkauv submerged arc welded (SSAW) steel kavrau kev thov cov ntawv thov uas yuav tsum tau ua kom zoo dua qub, suav nrog kev ua haujlwm siab -siab xa mus, qis- kev pabcuam kub, thiab qhov chaw pabcuam qaub.
Kev nkag siab zoo: GB/T 9711.2 yogtsis yog ib daim ntawv nyob ib leeg. Nws yuav tsum tau siv ua ke nrogGB/T 9711.1(Cov kev cai dav dav) los ua kom tiav cov lus qhia rau PSL 2 SSAW kav.
Qauv qauv
| Ib feem | Title | Daim ntawv thov |
|---|---|---|
| GB/T 9711.1 | Cov kev cai dav dav | Lub hauv paus yuav tsum tau rau tag nrho cov kav dej (nrog SSAW feem ntau) |
| GB/T 9711.2 | PSL 2 xav tau | Ntxiv qhov yuav tsum tau ua kom zoo dua rau PSL 2 |
| GB/T 9711.3 | PSL 3 xav tau | Qib siab zoo (tsis tshua muaj siv) |
Txoj cai siv: GB/T 9711.1 + GB/T 9711.2=Ua tiav cov lus qhia rau PSL 2 SSAW kav .
Ntsiab Specifications
| Yam ntxwv | Kev piav qhia |
|---|---|
| Txuj | GB / T 9711.2 (tam sim no version: GB / T 9711.2-2023; yav dhau los: GB / T 9711.2-2011/1999) |
| Qib zoo | PSL 2 (Product Specification Level 2)- Txhim kho qhov zoo rau kev pabcuam tseem ceeb |
| Daim ntawv thov | Siab - roj thiab roj kis tau tus mob; kev pabcuam qaub; low-kev pabcuam kub |
| Qib Steel | L245 txog L555 (sib npaug rau API 5L Qib B txog X80) |
| Kev tsim khoom | Spiral Submerged Arc Vuam (SSAW) - ob npaug -sab tsis siv neeg submerged arc vuam |
| Size Range (SSAW) | 219mm txog 3620mm(approx. 8" to 142") OD |
| Phab ntsa Thickness | 5mm mus rau 26mm(ntau ntau 5-26 mm) |
| Ntev | 6 m txog 18 m txheem; mus txog 32 m muaj |
| Xaus Xaus | Plain xaus, beveled xaus (30℃bevel kaum sab xis) |
Qib Steel (L-Series) - PSL 2
| Qib | Tsawg-yield (MPa) | Max tawm tswv yim (MPa) | Tsawg Tensile (MPa) | Sib npaug API 5L |
|---|---|---|---|---|
| L245 | 245 | 450 | 415 | Qib B |
| L290 | 290 | 495 | 415 | X42 |
| L320 | 320 | 525 | 435 | X46 |
| L360 | 360 | 530 | 460 | X52 |
| L390 | 390 | 545 | 490 | X56 |
| L415 | 415 | 565 | 520 | X60 |
| L450 | 450 | 600 | 535 | X65 |
| L485 | 485 | 635 | 570 | X70 |
| L555 | 555 | 705 | 625 | X80 |
Lus Cim: Cov ntawv tom qab (M, N, Q) qhia txog kev kho cua sov (M=TMCP, N=Normalized, Q=Quenched & tempered).
PSL 2 vs. PSL 1 Sib piv
| Feature | PSL 1 (GB/T 9711.1) | PSL 2 (GB/T 9711.2) | Qhov tseem ceeb |
|---|---|---|---|
| Qib zoo | Txuj | Txhim kho | Kev ntseeg siab dua |
| Chemistry Control | Txheem txwv | Tighter txwv(C Tsawg dua lossis sib npaug rau 0.12-0.22%, S Tsawg dua lossis sib npaug rau 0.015%) | Zoo dua weldability, HIC kuj |
| Yield zog | Yam tsawg kawg nkaus xwb | Yam tsawg kawg nkaus thiab siab kawgqhia | Tiv thaiv tshaj - cov ntaub ntawv muaj zog |
| Yield-rau-Tensile Ratio | Tsis tau teev tseg | Tsawg dua lossis sib npaug li 0.93 | Xyuas kom txaus ductility |
| Kev ntsuam xyuas cuam tshuam | Tsis xav tau | Yuav tsum tauntawm qhov kub thiab txias | Guarantee qis -kub toughness |
| NDT Requirements | Txuj | 100% kev(RT/UT) | Kev kuaj pom zoo dua |
| 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 (PSL 2 SSAW)
| Qib | C max | Si max | Mn max | P max | S max |
|---|---|---|---|---|---|
| L245M (Qib B) | 0.22 | 0.45 | 1.20 | 0.025 | 0.015 |
| L290M (X42M) | 0.22 | 0.45 | 1.30 | 0.025 | 0.015 |
| L360M (X52M) | 0.22 | 0.45 | 1.40 | 0.025 | 0.015 |
| L415M (X60M) | 0.12 | 0.45 | 1.60 | 0.025 | 0.015 |
| L450M (X65M) | 0.12 | 0.45 | 1.60 | 0.025 | 0.015 |
| L485M (X70M) | 0.12 | 0.45 | 1.70 | 0.025 | 0.015 |
| L555M (X80M) | 0.12 | 0.45 | 1.85 | 0.025 | 0.015 |
* Ceeb Toom: Cov qib siab dua (X60-X80) muaj cov ntsiab lus qis dua rau cov weldability zoo dua.*
Yam yuav tsum tau muaj kev xeem cuam tshuam (PSL 2)
| Qib | Kev ntsuas kub | Yam tsawg kawg nruab nrab zog | Qhov chaw piv txwv |
|---|---|---|---|
| L245 NIB | -10 degree | 27 J | Weld & HAZ |
| L360 NIB | -10 degree | 40 J | Weld & HAZ |
| L415 NIB | -10 degree | 45 J | Weld & HAZ |
| L450 NIB | -10 degree | 50 J | Weld & HAZ |
| l485 wb | -10 degree | 60 J | Weld & HAZ |
Dimensional Tolerances (PSL 2)
| Parameter | Ua siab ntev | Kev ntsuas ntsuas |
|---|---|---|
| Sab nraud txoj kab uas hla | ± 0.5% lossis ± 3mm | Daim kab xev |
| 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 txoj kab uas hla |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.15% ntawm qhov ntev | Ncaj ntug |
| Length (taw) | +100mm / -0mm | Daim kab xev ntsuas |
| Xaus Squareness | Tsawg dua los yog sib npaug li 1.6mm | Square cuab tam |
SSAW Manufacturing Process (PSL 2)
Kauv welded kav nyob rau hauv GB / T 9711.2 yog tsim nrog txhim khu kev qha zoo:
| Kauj ruam | Kev piav qhia | PSL 2 Cov Lus Qhia Tshwj Xeeb |
|---|---|---|
| 1. Khoom siv Traceability | Txhua phaj / coil qhia tus kheej | Tag nrho traceability los ntawm tshav kub mus rau cov yeeb nkab |
| 2. Ntug Kev Npaj | Sawb npoo milled rau vuam zoo | Precision ntug milling |
| 3. Kauv sib sau | Nruam muab kauv tsim nyob rau hauv chav tsev kub | nruj me ntsis tswj |
| 4. Submerged Arc Vuam | Ob npaug -sab tsis siv neeg SAW (sab hauv + sab nraud) | Cov txheej txheem vuam yuav tsum tsim nyog |
| 5. Weld Kho | txwv kev kho tau tso cai | Max 2 kho ib qho weld |
| 6. NDT Inspection | 100% radiographic (RT) thiab / lossis ultrasonic (UT) | Tag nrho weld ntev soj ntsuam |
| 7. Kev Ntsuas Hydrostatic | 95% SMYS, Ntau dua lossis sib npaug rau 30 vib nas this tuav | Siab siab tshaj PSL 1 |
| 8. Ua tiav | Xaus beveling, txheej, cim | Txhim khu kev cai cim |
Tsis yog -Kev kuaj kev puas tsuaj (PSL 2)
| NDT Method | Kev pab them nqi | Kev lees txais |
|---|---|---|
| Kev ntsuas hluav taws xob (RT) | 100% weld ntev | Cracks tsis tso cai |
| Ultrasonic (UT) | 100% weld ntev | Tsis muaj fusion Tsawg dua lossis sib npaug ntawm 12.5mm ntev |
| Visual (VT) | 100% nto | Smooth weld hloov |
| Sib nqus Particle (MT) | Txhua qhov kev kho | Tsis muaj linear defects |
Weld Bead Profile Requirements (PSL 2)
| Parameter | Internal Weld | Sab nraud Weld |
|---|---|---|
| Reinforcement Qhov siab | 0-2.5 hli | 0-3.0 hli |
| Undercut | Tsawg dua los yog sib npaug li 0.5mm qhov tob | Tsawg dua los yog sib npaug li 0.8mm qhov tob |
| Sib tshooj | Tsis tso cai | Tsis tso cai |
Cov ntawv thov siv
| Daim ntawv thov | Kev piav qhia |
|---|---|
| Siab -Hloov Gas Transmission | Ntev -ntaus cov raj xa hluav taws xob |
| Crude Roj Trunk Kab | Cov kab txuas tseem ceeb rau cov roj av |
| Offshore Pipelines | Subsea pipelines xav tau lub zog siab - rau - qhov hnyav piv |
| Sour Service | H₂S ib puag ncig (nrog rau NACE ntxiv) |
| Tsawg- Kev Pabcuam Kub | Arctic thiab txias huab cua pipelines |
| Kev tswj kav kav dej | FERC, DOT, FEMSA ua raws |
Cov ntaub ntawv zoo (PSL 2)
| Cov ntaub ntawv | Cov ntsiab lus xav tau |
|---|---|
| Mill Certificate (Hom 3.1) | Tag nrho cov tshuaj, txhua yam, NDT cov txiaj ntsig |
| Cov ntaub ntawv vuam | WPS, PQR, WPQ |
| NDT Records | RT films, UT scans, ceeb toom |
| Hydrostatic Test | Siab- lub sijhawm teev |
| Cov ntaub ntawv Traceability | Thaum tshav kub kub rau cov yeeb nkab |
| Kho Cov Ntaub Ntawv | Tag nrho cov ntaub ntawv kho |
Cov Lus Cog Tseg (PSL 2)
| Cov ntaub ntawv | Marking Method |
|---|---|
| Chaw tsim tshuaj paus | Stencil/paint nyob ze yeeb nkab kawg |
| Txuj | "GB/T 9711.2" |
| Qib | e.g., "L485M" |
| PSL Qib | "PSL 2" |
| Kub naj npawb | Cim ID |
| Cov kav dej naj npawb | Ua ntu zus |
| Kuaj Siab | Tus nqi tiag MPa |
Qhov zoo ntawm GB / T 9711.2 SSAW Yeeb Nkab
| Qhov zoo | Kev piav qhia |
|---|---|
| Ua kom zoo | PSL 2 muab kev lees paub qis -kub toughness thiab tswj nruj dua |
| Siab zog | Qib mus txog L555 (X80) nrog 555 MPa yam tsawg kawg nkaus |
| Loj Loj Muaj peev xwm | SSAW tsim cov kav dej ntawm 8 "mus rau 142" OD |
| 100% NDT | Yuav tsum tau radiographic los yog ultrasonic soj ntsuam ntawm weld seam |
| Tag nrho Traceability | Pipe-los ntawm- yeeb nkab traceability kom tiav cov ntaub ntawv zoo |
| Sour Service Muaj peev xwm | Muaj nrog HIC/SSC xeem rau H₂S ib puag ncig |
| International Compatibility | Technically ua raws li API 5L PSL 2 |
Kev txiav txim siab tseem ceeb
1. GB/T 9711.2 tsis nyob ib leeg
Cov qauv no yuav tsum tau siv ua ke nrogGB/T 9711.1. Ua kom tiav qhov tshwj xeeb=GB / T 9711.1 + GB / T 9711.2 .
2. PSL 2 vs. PSL 1 Xaiv
PSL 2: Yuav tsum muaj rau qhov kev pabcuam kub tsawg, kev pabcuam qaub (H₂S ib puag ncig), cov kav dej tswj, thiab cov ntawv thov tseem ceeb
PSL 1: Haum rau kev pabcuam dav dav, cov kab dej, tsis yog - cov ntawv thov tseem ceeb
3. Sour Service Requirements (Optional)
Rau H₂S ib puag ncig, qhia cov kev xav tau ntxiv:
HIC Test rau NACE TM0284 (CLR Tsawg dua lossis sib npaug rau 15%, CTR Tsawg dua lossis sib npaug li 5%)
SSC Test rau NACE TM0177 (Tsis muaj cracking ntawm 90% AYS)
Hardness Tsawg dua los yog sib npaug rau 250 HV10
4. Qib Nomenclature
Cov ntawv tom qab qhia txog kev kho cua sov:
M: Thermomechanical dov (TMCP) - feem ntau rau SSAW
N: normalized
Q: Quenched thiab tempered
S: Sour Service
5. Thib peb-Kev soj ntsuam tog
Muaj cov kev pabcuam tshuaj xyuas suav nrog SGS, BV, Lloyds
6. Cov Qauv Qauv
Tam sim no version:GB/T 9711.2-2023
Yav dhau los: GB / T 9711.2-2011, GB / T 9711.2-1999
Cov ntsiab lus
GB/T 9711.2 Kauv Submerged Arc Welded (SSAW) steel yeeb nkabyog Suav teb chaws tus qauv rauPSL 2 (txhim kho qhov zoo) kab yeeb nkabsiv rau hauv kev siv roj thiab roj tseem ceeb. Nrog cov qib steel los ntawm L245 txog L555 (sib npaug rau API 5L Qib B txog X80), tus qauv no npog loj - txoj kab uas hla uas yuav tsum tau lav qhov qis- qhov kub thiab txias, nruj dua kev tswj xyuas, thiab tag nrho traceability.
Cov yam ntxwv tseem ceeb:
TxujGB / T 9711.2 - PSL 2 qhov yuav tsum tau ua rau cov kav dej roj thiab roj
Qib zoo: PSL 2 – txhim khu kev qha zoo rau kev pabcuam tseem ceeb
QibL245 txog L555 - sib npaug rau API 5L Qib B txog X80
SSAW manufacturingtsim cov kav dej los ntawm8" rau 142" ODnrog phab ntsa thickness mus txog26 mm
Ob -sab vuamtsim ib lub siab -zoo weld nugget
100% NDT(RT/UT) ntawm weld seam yuav tsum tau
Yuav tsum tau kuaj qhov cuam tshuamntawm qhov ntsuas kub (feem ntau -10 degree)
Kev tswj tshuaj nruj dua- carbon Tsawg dua lossis sib npaug 0.12-0.22%, sulfur Tsawg dua lossis sib npaug rau 0.015%
Kev txwv lub zog siab tshaj plawstiv thaiv tshaj - cov ntaub ntawv muaj zog
Tag nrho traceabilitylos ntawm steelmaking mus rau cov yeeb nkab tiav
Cov ntawv thov uas muaj xws li:
Siab -cov kav xa hluav taws xob siab
Offshore thiab subsea pipelines
Cov ntawv thov kev pabcuam qaub (nrog NACE cov kev xav tau ntxiv)
Tsawg-kub thiab cov kav dej arctic
Kev tswj kav dej (FERC, DOT, FEMSA)
Thaum ordering, qhia:GB/T 9711.1 + GB/T 9711.2, Qib (piv txwv li, L485M), SSAW (kauv submerged arc welded), Loj (OD x WT), Ntev, Qhov Kawg Finish (plain/beveled), Txheej Txheej, Kev Ntsuas Kub Kub, thiab Daim Ntawv Pov Thawj Zeb Xeem (EN 3.104). Rau cov ntawv thov kev pabcuam qaub, qhia qhov kuaj HIC/SSC ntxiv rau NACE MR0175 .
