Thaum ob leegASTM A252, ASTM A252thiab API 5L yog cov qauv rau cov pa roj carbon steel kav, lawv ua haujlwm sib txawv heev. Qhov txawv yog feem ntau nyob rau hauv daim ntawv thov Scope, cov khoom yuav tsum tau, thiab manufacturing txheej txheem.
Daim Ntawv Thov Scope
| Txuj | Cov ntawv thov tseem ceeb |
|---|---|
| ASTM A252, ASTM A252 | Cov yeeb nkab rau lub hauv paus kev txhawb nqa, cylindrical plhaub rau cam khwb cia-hauv- qhov chaw pob zeb. Feem ntau siv nyob rau hauv: Steel Piling, Foundation Engineering, Choj, Vaj tse & Infrastructure, Deep Foundation Pit Support. |
| API 5L | Pipeline kev thauj mus los hauv kev lag luam roj av thiab natural gas. Xws li Roj & Roj Pipelines, Crude Oil Pipelines, Natural Gas Pipelines, Petrochemical Transport, High-Tshuaj Fluid Transport. |
Kev pom zoo: ASTM A252 cov kav dej yog cov qauv, feem ntau rau kev thauj khoom -cov kabmob. API 5L cov kav dej yog tsim los rau kev thauj cov dej hauv qab kev nyuaj siab thiab ib puag ncig.
Cov txheej txheem tsim khoom
| Txuj | Cov txheej txheem tso cai |
|---|---|
| ASTM A252, ASTM A252 | Seamless, Electric Resistance Welded (ERW), Flash Welded, Fusion Welded, SSAW (Submerged Spiral Arc Welded), LSAW (Longitudinal Submerged Arc Welded), Helical Kauv Welded. |
| API 5L | Seamless, Electric Welded (EW), Longitudinal Welded (LW), Cold Welded (CW), Longitudinal Fusion Welded (LFW), High-Frequency Welded (HFW), SAWL, SAWH, COWL, COWH. |
Nco tseg: API 5L muaj ntau txoj kev tsim khoom vim muaj qhov sib txawv ntawm cov raj xa dej, suav nrog kev siab - siab thiab kev siv sab nrauv.
Qib
| Txuj | Qib |
|---|---|
| ASTM A252, ASTM A252 | Qib 1, Qib 2, Qib 3 (Qib 3 feem ntau tshwm sim rau pawg hauv paus) |
| API 5L | L175 (A25) txog L830 (X120), suav nrog 15 qib xws li Qib B, X52, X60. Muab faib ua PSL1 thiab PSL2; PSL2 suav nrog cov kav dej rau acidic, offshore, lossis siab -cov ntawv siv lim. |
Tshuaj muaj pes tsawg leeg
| Element | ASTM A252 Qib 3 | API 5L PSL1 X52 |
|---|---|---|
| C | - | Seamless: 0.28%, Welded: 0.26% |
| Mn | - | 1.40% max |
| P | 0.050% max | 0.030% max |
| S | - | 0.030% max |
| Nb+V+Ti | - | Tsawg dua lossis sib npaug li 0.15% |
Kev pom zoo: ASTM A252 tsuas yog txwv phosphorus kom ntseeg tau tias muaj kev sib txuas, thaum API 5L yuav tsum muaj kev tswj hwm tshuaj nruj dua vim muaj kev pabcuam nyob rau hauv siab thiab hnyav ib puag ncig.
Mechanical Properties
| Khoom | ASTM A252 Qib 3 | API 5L PSL1 X52 |
|---|---|---|
| Yield zog | 310 MPa (45,000 psi) | 359 MPa (52,000 psi) |
| Tensile zog | 455 MPa (66,000 psi) | 460-530 MPa (67-77,000 psi) |
| Elongation | 20% | 20–25% |
| Kev sim | Tsuas yog yuav tsum tau kuaj tensile | Flattening, dabtsi yog khoov, cuam tshuam, metallographic, hydrostatic / non{0}}kev kuaj kev puas tsuaj |
Kev pom zoo: ASTM A252 tsom rau kev txhawb nqa cov qauv; API 5L yuav tsum muaj kev ruaj ntseg zoo rau kev thauj cov dej.
Qhov ntev
| Txuj | Hom OD Range | Phab ntsa Thickness | Sau ntawv |
|---|---|---|---|
| ASTM A252, ASTM A252 | 152-609 mm (kho tau li 3000+ mm) | Cov nominal, ± 12% | Cylindrical nkaus xwb |
| API 5L | 10.3-2134 hli | Tshwj xeeb nominal, kam rau ua raws li API |
Hloov cov kav dej rau kev pabcuam kav
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ASTM A252: Qhov zoo tshaj plaws rau pawg hauv paus, kev txhawb nqa lub tsev, thiab cov txheej txheem steel piling. Tus nqi - zoo thiab tsim los rau kev thauj khoom - bearing es tsis yog cov dej thauj.
API 5L: Zoo tagnrho rau cov roj, roj, thiab siab - cov kav dej siab. Muab cov qauv tshuaj lom neeg thiab cov tshuab ua kom siab dua nrog kev sim nruj. kim dua vim nruj specifications.
