API 5L X46 / L320 ERW Yeeb Nkab
API 5L X46 (tseem sau L320) ERW yeeb nkabyog cov pa roj carbon-manganese kab yeeb nkab nrog qhov tsawg kawg nkaus yield zog ntawm320 MPa (46,400 psi), ua los ntawm siab - zaus hluav taws xob tsis kam vuam (HFW/ERW) thiab muab rau PSL1 lossis PSL2. Nws zaum ib kauj ruam saum X42 thiab ib qho hauv qab X52, muab tus nqi - siv zog ua haujlwm rau nruab nrab - roj, roj thiab dej xa mus. Peb yam uas koj qhov kev txiav txim yuav tsum txiav txim siab yog qhovPSL qib, covsab nraud txoj kab uas hla thiab phab ntsa, thiab ib qhoqaub- kev pabcuam lossis cuam tshuam- lub npe qeb ib leeg tsis muaj qhov ntawd.
API 5L npe tib lub steel ob txoj kev:X46siv lub rooj sib tham ksi (46 × 1,000 psi ≈ 320 MPa), thaumL320siv SI convention (320 MPa). Ob leeg tshwm thoob plaws nplooj ntawv no thiab ntawm daim ntawv pov thawj. ERW yog ib qho ntawm ntau txoj kev rau X46; seamless thiab LSAW / SSAW ua cov qib zoo ib yam, thiab txoj kev xaiv yog hais txog txoj kab uas hla, txoj kab ntev seam thiab kev lag luam - tsis yog hais txog steel lub zog.
X46 ERW yog tsim los ntawm 21.3 hli mus rau 609.6 hli (1/2–24 nyob rau hauv) sab nraud txoj kab uas hla, nrog rau phab ntsa ntawm 1.8 hli mus rau 22.2 hli. Peb khaws ntau qhov ntau thiab tsawg thiab yob rau kev txiav txim, nrog 3.1 mill daim ntawv pov thawj raws li tus qauv thiab thib peb- tog tshuaj xyuas ntawm kev thov.Xa koj OD, phab ntsa, ntev thiab PSL rau kev hais lus.
Technical Specifications
| Parameter | Muaj peev xwm |
|---|---|
| Txuj | API Spec 5L (46th ed.) / ISO 3183 |
| Qib | X46 / L320 |
| Txheej txheem | ERW / HFW (siab- zaus induction welded) |
| Product specification qib | PSL1 los yog PSL2 |
| Sab nraud txoj kab uas hla | 21.3-609.6 hli (1/2-24 nyob rau hauv) |
| Phab ntsa thickness | 1.8-22.2 hli (Tshooj 10 txog 160, STD/XS/XXS) |
| Ntev | 3-18 m; SRL 5-7 m, DRL 11-13 m, lossis ntev ntev |
| Xaus | Plain kawg, beveled rau ASME B16.25 (30℃± 5 degree), los yog threaded + coupling |
| Nto / txheej | Liab qab, varnished, 3LPE, 3LPP, FBE, thee -tar epoxy |
| Daim ntawv pov thawj | EN 10204 3.1 raws li tus qauv; 3.2 nrog TÜV / SGS / BV raws li kev thov |
Tshuaj muaj pes tsawg leeg
| Element | PSL1 seamless | PSL1 vuam | PSL2 L320N (normalized) | PSL2 L320Q (quenched) | PSL2 L320M (welded) |
|---|---|---|---|---|---|
| Cov pa roj carbon (C) | 0.28 | 0.26 | 0.24 | 0.18 | 0.22 |
| Silicon (Si) | - | - | 0.40 | 0.45 | 0.45 |
| Manganese (Mn) | 1.20 | 1.20 | 1.20 | 1.40 | 1.30 |
| Phosphorus (P) | 0.030 | 0.030 | 0.025 | 0.025 | 0.025 |
| Sulfur (S) | 0.030 | 0.030 | 0.015 | 0.015 | 0.015 |
| Niobium (Nb) | - | - | 0.05 | 0.05 | 0.05 |
| Vanadium (V) | - | - | 0.07 | 0.05 | 0.05 |
| Titanium (Ti) | - | - | 0.04 | 0.04 | 0.04 |
| Carbon sib npaug | tsis tau teev tseg | tsis tau teev tseg | CE_IIW Tsawg dua lossis sib npaug rau 0.43; CE_Pcm Tsawg dua lossis sib npaug rau 0.25 | CE_IIW Tsawg dua lossis sib npaug rau 0.43; CE_Pcm Tsawg dua lossis sib npaug rau 0.25 | CE_IIW Tsawg dua lossis sib npaug rau 0.43; CE_Pcm Tsawg dua lossis sib npaug rau 0.25 |
PSL1 tsis muaj cov pa roj carbon- qhov yuav tsum tau sib npaug thiab tsis muaj micro- alloy minima; PSL2 tswj C, Si, cov khoom huv si P/S thiab micro-alloying (Nb + V + Ti Tsawg dua lossis sib npaug li 0.15 %). Raws li txoj cai sib pauv Mn–C, txo qis C hauv qab qhov siab tshaj plaws nce qhov tso cai Mn (txog +0.05 % Mn ib −0.01 % C), mus txog 1.65 % rau qib dhau L360 - ib qho kev xaiv zeb, tsis yog lub neej ntawd.
Mechanical Properties
| Khoom | PSL1 | PSL2 |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 320 MPa (tsis muaj qhov siab tshaj plaws) | 320-525 MPa (46,400-76,100 psi) |
| Tensile zog | Ntau dua lossis sib npaug rau 435 MPa (tsis muaj qhov siab tshaj plaws) | 435-655 MPa (63,100-95,000 psi) |
| Yield-rau-tensile ratio | tsis tau teev tseg | Tsawg dua lossis sib npaug li 0.93 (rau OD> 323.9 mm) |
| Elongation | Los ntawm API 5L formula los ntawm qhov chaw kuaj thiab teev min. tensile; tsis yog ib qho ruaj khov% | |
| Charpy cuam tshuam (PSL2) | tsis xav tau | 0℃, avg Ntau dua lossis sib npaug rau 27 J, ib zaug Ntau dua lossis sib npaug rau 20 J; qhov project xaiv rau qis temp |
| Cov qauv ntsuas | API Spec 5L / ISO 3183; daim ntawv pov thawj EN 10204 3.1 / 3.2 | |
Nco ntsoov lub PSL2 qab nthab: X46 tsis yog "yield 320 thiab qhov ntawd yog tag nrho." PSL2 lub kaus mom tawm los ntawm 525 MPa thiab tensile ntawm 655 MPa los tiv thaiv thaj chaw weldability thiab strain peev. Hais txog 320 MPa tawm los uas tsis muaj qab nthab ntawm PSL2 yeeb nkab yog qhov yuam kev tshwj xeeb.
PSL1 vs PSL2 - Yuav Ua Li Cas Txhua Yam Ua Rau
| Kev xav tau | PSL1 | PSL2 |
|---|---|---|
| Charpy impact test | Tsis xav tau | Yuav tsum tau (0 degree, 27 J avg) |
| Carbon sib npaug | Tsis muaj | CE_IIW Tsawg dua lossis sib npaug rau 0.43, CE_Pcm Tsawg dua lossis sib npaug rau 0.25 |
| Yield / tensile qab nthab | Tsis muaj | Tawm Tsawg dua lossis sib npaug rau 525, tensile Tsawg dua lossis sib npaug rau 655 MPa |
| NDE ntawm weld | Ib daim ntawv cog lus yuav khoom | Yuav tsum tau ua (full -ntev UT/ET) |
| Traceability | Kom kawg ntawm kev xeem nkaus xwb | Los ntawm kev ua tiav (SR 15.2) |
| Sour Service (H₂S) | Tsis tsim nyog | Tsim nyog nrog qaub annex + NACE |
| Hom kev siv | Tsis yog -tseem ceeb, qab zib, ambient | Toughness / qaub / traceed tej yaam num |
Xaiv PSL1 lossis PSL2
| Qhov xwm txheej | Pom zoo PSL |
|---|---|
| Qab zib, ambient, tsis yog - cov kab hluav taws xob tseem ceeb | PSL1 |
| Txhua yam toughness, traceability lossis HIC yuav tsum tau | PSL2 |
| Wet H₂S (qaub) ib puag ncig | PSL 2 + qaub annex + NACE MR0175 / ISO 15156 |
| Tsawg- kub los yog cyclic offshore raug | PSL2 nrog qhov ntsuas qhov ntsuas kub |
Cov yeeb nkab nqa dab tsi: Kev ntsuas siab los ntawm phab ntsa
Ua haujlwm siab ua raws li Barlow tus qauv,P = 2·S·t / D, qhov twg S yog tso cai hoop kev nyuaj siab, t phab ntsa thiab D sab nraud txoj kab uas hla. Hauv qab no yog kev tshuaj ntsuam - theem rooj ntawm 0.72 tus qauv tsim (S ≈ 230 MPa), tsis muaj kev tiv thaiv corrosion lossis kub derating. Nws qhia tau hais tias yog vim li cas "siab siab" yuav tsum nco ntsoov hais nrog phab ntsa tuab.
| Nominal | OD (mm) | Phab ntsa (mm) | MAOP (MPa) | MAOP (psi) | MAOB (bar) |
|---|---|---|---|---|---|
| NPE 6 | 168.3 | 7.11 (SCH 40) | 19.5 | 2,825 | 195 |
| NPE 8 | 219.1 | 8.18 TSI (SCH 40) | 17.2 | 2,495 | 172 |
| NPE 12 | 323.9 | 8.38 (TSH 40) | 11.9 | 1,730 | 119 |
| NPE 12 | 323.9 | 10.31 (SCH XS) | 14.7 | 2,130 | 147 |
| NPE 16 | 406.4 | 9.53 (0.375 nyob rau hauv) | 10.8 | 1,565 | 108 |
| NPE 20 | 508.0 | 9.53 (0.375 nyob rau hauv) | 8.6 | 1,253 | 86 |
| NPE 24 | 609.6 | 9.53 (0.375 nyob rau hauv) | 7.2 | 1,045 | 72 |
Kev ntsuam xyuas suav tsuas yog - tsis yog qhov hloov pauv rau kev tsim qhov project. Qhov tseeb MAOP kuj nyob ntawm tus qauv tsim rau koj qhov chaw nyob hauv chav kawm (ASME B31.4 / B31.8), qhov kub thiab txias, kev tiv thaiv corrosion, thiab ib qho yeeb nkab- lub cev lossis vuam seam yam. Xa koj lub luag haujlwm rau peb pab neeg rau qhov project- tshwj xeeb kos.
Qhov twg X46 zaum hauv Qib Qib
X46 yog qhov nruab nrab - lub zog khiav. Stepping nce lossis nqis hloov phab ntsa thickness thiab tus nqi rau tib lub siab.
| Qib | Min yield (MPa) | Sib piv rau X46 | Thaum twg los xaiv |
|---|---|---|---|
| B / L245 | 245 | −23 % | Tsawg- siv hluav taws xob siab, tus nqi qis tshaj |
| X42 / L290 | 290 | −9 % | Thaum X46 dhau me ntsis dhau - qhia |
| X46 / L320 | 320 | puag | Nruab nrab -siab kis |
| X52 / L360 | 360 | +12 % | Siab siab los yog nyias phab ntsa xav tau |
| X60 / L415 | 415 | +30 % | Siab - cov kab hauv siab |
| X70 / L485 | 485 | +52 % | Siab-siab, ntev-haul, strain-raws li tsim |
Rau tib lub luag haujlwm, xaiv X52 dhau X46 cia koj nyias phab ntsa (kwv yees li 12% tawm los ntau dua), tab sis tus nqi ntau dua ib tonne thiab xav tau kev saib xyuas vuam ntau dua. X46 yog qhov kev xaiv pheej yig thaum X42 qis dua - lub zog tab sis X52 dhau lawm - qhia.
X46 thiab L320 yog tib yam hlau
Tsis muaj kev txiav txim siab "X46 vs L320".X46 thiab L320 yog ib qib nyob rau hauv ob lub npe: X46 yog lub npe ksi (46 × 1,000 psi), L320 yog lub npe SI (320 MPa). Ib qhov project specification sau hauv MPa yuav hais L320; ib tug sau nyob rau hauv psi yuav hais tias X46. Ob leeg yuav tsum tau tawm tsawg kawg yog 320 MPa thiab muab rau cov kev cai API 5L zoo ib yam. Xeev ib qho ntawm qhov kev txiav txim - thiab yog tias qhov seem ntawm qhov tshwj xeeb yog nyob rau hauv SI units, L320 yog qhov kev xaiv zoo ib yam. Saib peb cov kab yeeb nkab Performance index rau tag nrho cov npe qib.
Carbon sib npaug thiab Weldability
Weldability yog tswj los ntawm carbon sib npaug. PSL1 teeb tsa tsis muaj CEV txwv; rau PSL2, API 5L xav tauCE_IIW Tsawg dua lossis sib npaug rau 0.43 thiab CE_Pcm Tsawg dua lossis sib npaug rau 0.25, where CE_IIW=C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Vim X46 yog ib qho qis-carbon, tswj-manganese steel, cov txheej txheem vuam txheej txheem siv nrog me me, yog tias muaj, ua ntej ua ntej rau cov phab ntsa tuab.
Daim ntawv pov thawj tsis luam CEV cia li - nws yog xam los ntawm lub ladle tsom xam. Thov CEV qhia meej yog tias koj qhov kev tsim nyog WPS lossis qhov project specification hu rau nws. Rau cov ntu tuab lossis cov pob qij txha nruj heev, paub meej tias lub preheat nrog peb cov kws ua haujlwm vuam.
Standards thiab Editions nyob rau hauv Force
| Txuj | Kawm paub | Tsab ntawv tam sim no | Hloov |
|---|---|---|---|
| API Spec 5L | Kab yeeb nkab (qib, PSL, xeem) | 46 ed ib. (2018); 47ed ib. luam tawm Lub Rau Hli 2, 2026 | 45ed ib. |
| TS EN ISO 3183 | Hlau yeeb nkab rau kev thauj mus los | 2019 | 2007 / 2012 |
| ASME B36.10M | Welded & seamless wrought steel yeeb nkab qhov ntev | 2018 | 2004 |
| ASME B16.25 | Cov yeeb nkab weld kawg bevels | 2017 | 2003 |
| TS EN 10204 | Cov ntaub ntawv soj ntsuam (3.1 / 3.2) | 2004 | 1991 |
| NACE MR0175 / ISO 15156 | Qab zib - cov khoom siv txwv | tam sim no | - |
Cov47th tsab ntawm API Spec 5Ltau tshaj tawm thaum Lub Rau Hli 2, 2026 thiab, raws li kev tshaj tawm kev lag luam, nqa API Monogram ua raws hnub ntawm1 Lub Xya Hli 2027. Nws cov kev hloov pauv feem ntau cuam tshuam rau cov khoom no yognruj siab - zaus-welded (HFW/ERW) yeeb nkab tswj zoo, hloov tshiab qaub-kev pabcuam thiab cuam tshuam- cov kev cai nruj, lamination ultrasonic kuaj, hydrotest gauge calibration thiab NDE cov neeg ua haujlwm ntawv pov thawj. 46th tsab tseem tswj hwm feem ntau cov lus txiav txim niaj hnub no; vim hais tias cov ntawv sib txawv, daim ntawv xaj yuav tsum npe rau tsab ntawv uas nws tau muab tso rau.
Daim ntawv thov
X46 ERW ua haujlwm nruab nrab- lub zog sib kis thiab sib sau ua ke qhov ntev welded seam tau txais thiab cov kab uas hla nyob hauv lub hnab ntawv ERW zeb. Tsib daim ntawv thov npog feem ntau xav tau:
Onshore roj thiab roj sib sau ua ke kab
Tsawg-rau- nruab nrab siab sau los ntawm qhov dej thiab cov khoom sib cais mus rau hauv lub ntsiab, qhov twg X46's yield yog txaus thiab ERW tus nqi zoo.
Nruab nrab - siab kis tau tus mob mains
Cov kab hauv lub cev thiab cov ceg tseem ceeb uas X52 yuav dhau - qhia; Barlow suav (hauv qab) qhia txog kev ua haujlwm siab.
Kev txhaj tshuaj thiab kev faib dej
Cov dej nyab thiab cov kab hluav taws xob uas muaj kev tiv thaiv corrosion los ntawm txheej ntau dua li qib, ua rau PSL1 ERW kev lag luam.
Marine thiab jetty piping
Plua plav- dej tawm ntug dej hiav txwv thiab cov kab davhlau ya nyob twg; PSL2 nrog tswj toughness yog ib txwm rau lub cyclic thiab qis - kub raug.
Structure thiab piling
ERW X46 kuj tau muab rau cov qauv dual (xws li ASTM A53 Qib B) rau kev siv cov qauv thiab hauv paus qhov twg cov kab - daim ntawv pov thawj yeeb nkab yog ib qho ntxiv.
Vim li cas X46 ERW Yeeb Nkab los ntawm GNEE
ERW (HFW) thiab sab sauv seamless / SAW txoj hauv kev muaj, nrog ntau X46 qhov ntau thiab tsawg hauv Tshuag.
EN 10204 3.1 daim ntawv pov thawj raws li tus qauv; 3.2 nrog TÜV / SGS / BV tim khawv thaum thov.
Tag nrho cov cua sov-number traceability thiab hauv-lub tsev tensile, cuam tshuam, UT thiab hydrostatic testing.
ISO 9001 kev ua haujlwm zoo thiab 18+ xyoo steel- yeeb nkab xa tawm mus rau 60+ lub teb chaws.
Txiav-rau-ntev, beveling, coating coordination thiab thib peb- tog tshuaj xyuas ua ntej xa khoom.
L320 Steel Welded Pipe Chaw tsim khoom-GNEE Team
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Kev Tswj Xyuas Zoo thiab Kev Xeem
Hydrostatic xeem.Txhua cov yeeb nkab, ntawm qhov siab ntawm P=2St / D nrog S ntawm 60 % SMYS (PSL1) lossis txog li 90% SMYS (PSL2); Qhov tsawg kawg nkaus nyob 5 s (Ntau dua lossis sib npaug ntawm 10 s saum toj no 508 mm).
Weld NDE.100% tag nrho-ntev ultrasonic lossis eddy-tam sim no kuaj ntawm cov seam; PSL2 ntxiv tag nrho -lub cev UT.
Tensile thiab flattening / dabtsi yog khoov.Ib qho cua sov thiab ntau, lees paub tawm los, tensile thiab ductility.
Charpy impact (PSL2).0 degree, nruab nrab siab dua los yog sib npaug rau 27 J, ib leeg siab dua los yog sib npaug rau 20 J, ntawm cov yeeb nkab lub cev thiab vuam raws li siv tau.
Tshuaj ntsuam xyuas.Thaum tshav kub kub thiab khoom tsom xam tawm tsam PSL chemistry txwv saum toj no.
Thib peb-kev soj ntsuam tog.SGS, BV, TÜV lossis LR tim khawv thiab EN 10204 3.2 ntawv pov thawj raws li kev thov.
Xa koj sab nraud txoj kab uas hla, phab ntsa thickness, ntev, PSL theem thiab tej yam qaub- kev pab cuam los yog tej yam yuav tsum tau muaj - ntxiv seb koj xav tau ERW/HFW mov. Peb pab pawg kws tshaj lij yuav lees paub qhov tshwj xeeb, chij qhov tsis sib haum nrog tus qauv, thiab xa rov qab cov lus hais nrog lub sijhawm ua haujlwm thiab cov ntaub ntawv, feem ntau hauv 24 teev.
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FAQ
Qhov txawv ntawm API 5L X46 thiab L320 yog dab tsi?
X46 thiab L320 yog tib qib nyob rau hauv ob lub npe. X46 siv lub rooj sib tham ksi, qhov twg 46 txhais tau tias qhov tsawg kawg nkaus lub zog ntawm 46,000 psi (txog 320 MPa). L320 siv SI convention, qhov twg 320 yog qhov tsawg kawg nkaus tawm los ntawm MPa. Yog li X46 thiab L320 yog cov npe sib pauv tau; kev txiav txim yuav tuaj yeem hais, thiab feem ntau cov phiaj xwm thoob ntiaj teb specs sau L320.
Puas yog ERW yeeb nkab muaj zog li seamless yeeb nkab ntawm tib qib?
Nyob rau tib qib API 5L thiab PSL, ERW (HFW) thiab seamless yeeb nkab qhia tib yam tsawg kawg nkaus tawm los thiab tensile zog - 320 MPa yam tsawg kawg nkaus tawm los thiab 435 MPa yam tsawg kawg nkaus tensile rau X46. Qhov txawv yog qhov ntev weld seam, uas raug tshem tawm ntawm flash, tshav kub- kho thiab 100% tsis yog- kuaj xyuas. ERW tsis haum qhov twg qhov kev qhia tshwj xeeb txwv tsis pub lub seam ntev lossis qhov xav tau qhov loj heev; cov hu rau seamless los yog SAW txoj kev.
Thaum twg kuv yuav tsum qhia PSL2 hloov PSL1 rau X46?
Qhia PSL2 thaum qhov kev pab cuam xav tau Charpy cuam tshuam toughness, tswj cov pa sib npaug, yuav tsum tau traceability, los yog qaub-kev pab cuam (NACE MR0175 / ISO 15156). PSL1 tsis muaj qhov yuav tsum tau muaj kev cuam tshuam, tsis muaj CEV txwv, tsis muaj lub qab nthab thiab tsuas yog batch-theem traceability. Rau cov kev pabcuam ntub dej H2S (qaub), PSL2 yog qhov yuav tsum tau ua - PSL1 sulfur ntawm 0.030 % ua rau nws tsis haum.
Dab tsi yog qhov tawm los thiab tensile lub zog ntawm X46 yeeb nkab?
Qhov tsawg kawg nkaus tawm los yog 320 MPa (46,400 psi) rau PSL1 thiab PSL2. PSL1 tsis muaj kev khi sab saud ntawm kev tawm los lossis tensile. PSL2 teeb tsa lub qab nthab: tawm los 320–525 MPa thiab tensile 435–655 MPa, nrog rau qhov tawm los- rau- tensile piv tsis tshaj 0.93. Ib qho yuam kev feem ntau yog hais txog 245 MPa raws li X46 tawm los - uas yog Qib B (L245), tsis yog X46.
Qhov siab tshaj plaws ntawm ERW X46 yeeb nkab yog dab tsi?
ERW (HFW) kab yeeb nkab feem ntau yog tsim tawm mus txog 609.6 hli (24 nyob rau hauv) sab nraud txoj kab uas hla, nrog rau qee lub mills ncav cuag 26-30 nyob rau hauv. Saum toj no roughly 610 mm, longitudinal (LSAW) los yog kauv (SSAW/HSAW) submerged-arc vuam yog lub coilometry ntawm txoj kev dav thiab mills. Qib (X46) tsis hloov hla txoj kev no - tsuas yog lub peev xwm loj xwb.
X46 ERW yeeb nkab puas tuaj yeem siv rau kev pabcuam qaub (H2S)?
Tsuas yog raws li PSL2 tau xaj nrog cov qaub- kev pabcuam ntxiv ntawm API 5L ntxiv rau NACE MR0175 / ISO 15156, HIC kuaj rau NACE TM0284 thiab SSC kuaj rau NACE TM0177, nrog rau qhov tawv tawv tuav rau 22 HRC (kwv yees 250 HV10). Sulfur feem ntau nruj rau 0.015% thiab, ntawm cov haujlwm hnyav, mus rau 0.002% lossis qis dua. PSL1 X46 tsis tuaj yeem siv rau hauv kev pabcuam qaub vim nws 0.030% sulfur txhawb nqa manganese{17}}sulfide suav nrog tawg.
API 5L 47th tsab cuam tshuam li cas rau X46 ERW xaj?
47th tsab tau luam tawm rau 2 Lub Rau Hli 2026 thiab, raws li kev tshaj tawm kev lag luam, nqa API Monogram ua raws hnub tim 1 Lub Xya Hli 2027. Nws nruj heev -frequency-welded (HFW) yeeb nkab tswj zoo, qaub- kev pabcuam thiab cuam tshuam- cov neeg ua haujlwm toughness, calibration lamination thiab UTDE. ntawv pov thawj. 46th tsab tseem tswj hwm feem ntau xaj hnub no. Vim tias cov ntawv sib txawv, lub npe tsab ntawv ntawm kev yuav khoom; rau cov yeeb nkab xa hauv 2027-28, siv 47th tsab tam sim no.
Kuv yuav qhia li cas rau X46 ERW yeeb nkab xaj?
Xeev: (1) tus qauv thiab qib - API 5L X46 / L320; (2) PSL qib; (3) txheej txheem - ERW/HFW; (4) sab nraud txoj kab uas hla, phab ntsa thickness thiab ntev nyob rau hauv mm thiab nti; (5) xaus - dawb los yog beveled rau ASME B16.25; (6) txheej yog tias muaj (3LPE, FBE, thiab lwm yam); (7) cuam tshuam qhov kub thiab txias - kev pabcuam; (8) hom tshuaj xyuas thiab daim ntawv pov thawj (EN 10204 3.1 / 3.2); (9) qhov chaw nres nkoj tawm thiab lub sijhawm ua haujlwm. Xa cov no mus rau lub zeb rau ib daim ntawv lees paub.
Cim npe nrov: API 5L X46 / L320 ERW Yeeb Nkab, Tuam Tshoj API 5L X46 / L320 ERW yeeb nkab manufacturers, lwm tus neeg
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