Khoom Taw Qhia: API 5L Seamless Line Pipe (NACE MR0175 / ISO 15156)
Peb txaus siab muab cov khoom zoo siab - API 5L Seamless Steel Pipes, tshwj xeeb yog tsim los ua kom tau raws li cov kev cai nruj ntawm NACE MR0175 / ISO 15156 rau Sour Service.
Tus Qauv Zauv: API SPEC 5L (PSL1 & PSL2)
Sour Service Compliance: NACE MR0175 / ISO 15156 (Petroleum thiab natural gas industries-Cov khoom siv rau hauv H2S- muaj ib puag ncig hauv roj thiab roj ntau lawm).
Kev tsim khoom: Seamless (SMLS)
Sab nraud txoj kab uas hla:21.3 hli (1/2 ") txog 914 hli (36") thiab siab dua (kub- nthuav dav) -1-3.
Phab ntsa Thickness:SCH 10 txog SCH 160, XXS, lossis tshwj xeeb phab ntsa thicknesses txog 60 hli.
Ntev:Tib Random Length (SRL), Ob Chav Random Length (DRL), lossis ntev ntev raws li cov neeg siv khoom tshwj xeeb.
Vim li cas NACE MR0175?
NACE MR0175 yog tus qauv thoob ntiaj teb rau cov ntaub ntawv tiv thaiv Sulfide Stress Cracking (SSC) thiab Hydrogen Induced Cracking (HIC). Nyob rau hauv ib puag ncig uas muaj Hydrogen Sulfide (H₂S) -feem ntau hu ua "kev pabcuam qaub"- cov kav dej txheem carbon steel yog qhov ua rau tsis ua haujlwm. Peb cov kav dej tau ua kom zoo nrog kev tswj hwm cov tshuaj muaj pes tsawg leeg thiab kev txwv hardness kom muaj kev nyab xeeb thiab siv tau ntev hauv cov roj qaub thiab roj.
Chemical Composition (Key Requirements for NACE)
Yuav kom tsim nyog rau NACE MR0175, cov hlau yuav tsum muaj kev tswj hwm "Hardness" thiab cov chemistry tshwj xeeb. Cov kev cai ib txwm muaj rau kev pabcuam qaub (PSL2) yog nruj dua li tus qauv PSL1
| Element | Standard PSL1 (Max) | NACE MR0175 (Sour Service) (Max) | Kev cuam tshuam |
| Cov pa roj carbon (C) | 0.28% | 0.21% | Txo kom tsis txhob muaj cov tawv nqaij tawv |
| Manganese (Mn) | 1.40% | 1.00% | Tswj los tiv thaiv kev sib cais |
| Phosphorus (P) | 0.03% | 0.02% | Tightly tswj kom huv si |
| Sulfur (S) | 0.03% | 0.00% | Tsawg heev rau HIC tsis kam |
| Hardness (HRC) | Tsis muaj kev txwv tshwj xeeb | < 22 HRC | Tseem ceeb los tiv thaiv SSC |
Mechanical Properties (API 5L PSL2)
Thaum lub zog txhua yam sib tw qib API 5L qib, lub hardness yog nruj me ntsis saib xyuas. Hauv qab no yog cov kev xav tau ntawm kev siv tshuab rau cov qib sib xws:
| Qib | Yield zog (MPa) | Tensile zog (MPa) | Hardness Requirement (NACE) |
| X42 / L290 | 290 - 495 | 415 - 655 | Tsawg dua lossis sib npaug rau 22 HRC / 237 HBW |
| X52 / L360 | 360 - 530 | 460 - 760 | Tsawg dua lossis sib npaug rau 22 HRC / 237 HBW |
| X60 / L415 | 415 - 565 | 520 - 760 | Tsawg dua lossis sib npaug rau 22 HRC / 237 HBW |
| X65 / L450 | 450 - 600 | 535 - 760 | Tsawg dua lossis sib npaug rau 22 HRC / 237 HBW |
| X70 / L485 | 485 - 635 | 570 - 760 | Tsawg dua lossis sib npaug rau 22 HRC / 237 HBW |
* Ceeb Toom: Qhov Yield / Tensile piv rau PSL2 qaub cov kav dej yog feem ntau capped ntawm 0.93 los xyuas kom meej ductility
Kev Ntsuam Xyuas Tseem Ceeb & Kev Tswj Xyuas Zoo
Txhawm rau kom ua tau raws li NACE MR0175, peb ua nruj me ntsis tsis yog -kev kuaj kev puas tsuaj thiab kev puas tsuaj:
nthuav qhia Hydrostatic Test: 100% pov thawj.
Qhia Hardness Test: HRC/HB hla cov yeeb nkab lub cev, vuam (yog muaj), thiab HAZ.
Qhia HIC Test (Hydrogen Induced Cracking): Ib NACE TM0284 .
nthuav qhia SSC Test (Sulfide Stress Cracking): Ib NACE TM0177 (Txoj Kev A, B, C, lossis D).
nthuav qhia Impact Test (CVN): Yuav tsum tau ua rau PSL2 kom ntseeg tau tias muaj zog ntawm qhov kub thiab txias.
Daim ntawv thov
Roj & Gas Transmissions: Haum rau onshore thiab offshore pipelines uas muaj H2S ntub dej.
Refinery Piping: Rau kev ua cov roj crude nrog cov ntsiab lus sulfur siab.
Natural Gas Sweetening Plants: Qhov twg amine kev kho mob tsim corrosive ib puag ncig
Kev kho deg & ntim
Nto: liab qab, varnished, los yog anti-corrosion coatings (3PE, FBE) muaj.
Ends: Beveled xaus (BE) rau vuam, los yog threaded nrog couplings.
Ntim: Hlau pob khoom nrog lub hau yas, haum rau kev xa khoom hiav txwv.
Peb API 5L NACE MR0175 Seamless Pipes muab cov qib siab tshaj plaws ntawm kev nyab xeeb rau cov kev pabcuam qaub. Los ntawm kev sib txuas cov qib siab -lub zog API 5L nrog cov tshuaj nruj nruj thiab kev tswj xyuas nruj ntawm NACE MR0175, peb muab cov kev daws teeb meem txhim khu kev qha rau cov khoom siv hluav taws xob tseem ceeb.
Rau kev nug txog cov khoom muaj, daim ntawv pov thawj zeb xeem (MTC), lossis cov txheej txheem tshwj xeeb, thov hu rau peb.
Peb qhov chaw nyob
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