ASTM A53A Kauv Submerged Arc Welded (SSAW) Yeeb Nkab: Txheej txheem cej luam
Cov ntaub ntawv no muab cov lus piav qhia ntxaws txog cov kev qhia tshwj xeeb thiab cov yam ntxwv ntawm cov yeeb nkab steel uas tau xaiv los uaASTM A53 Qib A Spiral Submerged Arc Welded (SSAW)cev.
1. Deconstruction ntawm lub npe
Lub npe ua ke nrog plaub lub ntsiab lus tseem ceeb uas txhais cov yeeb nkab tus qauv, cov khoom siv, cov txheej txheem tsim khoom, thiab daim ntawv tsim khoom.
ASTM A53 Cov Lus Qhia:Qhov no yog tus qauv tshaj tawm los ntawm ASTM International, hu ua "Standard Specification rau Yeeb Nkab, Hlau, Dub thiab Kub -Dipped, Zinc-Coated, Welded thiab Seamless". Nws npog ntau yam kev siv siab thiab siv tshuab siv cov kav dej.
Qib A:Qhov no qhia covqib khoom sivhauv ASTM A53 tus qauv. Qib A muaj qis dua tensile thiab tawm los lub zog xav tau piv rau Qib B, ua rau nws tsim nyog rau kev thov tsawg dua.
Kauv / Helical:Qhov no piav txog tusgeometry ntawm weld seam. Lub steel sawb (skelp) yog pub ntawm lub kaum sab xis, tsim ib qho txuas txuas txuas txuas ntxiv raws qhov ntev ntawm cov yeeb nkab. Qhov no tso cai rau zus tau tej cov diameters loj los ntawm ib tug kuj nqaim sawb.
Submerged Arc Welding (SAW):Qhov no yog qhovtxheej txheem vuamsiv los tsim cov seam. Lub arc raug ntaus nyob rau hauv ib daim pam ntawm granular flux, uas tiv thaiv cov molten weld hlau los ntawm atmospheric paug. Qhov no ua rau lub siab - zoo, du, thiab muaj zog weld nrog kev nkag mus tob.
2. Cov yam ntxwv tseem ceeb & kev siv ntau
Qhov zoo ntawm SSAW txheej txheem:
Tus nqi -zoo rau cov kab loj loj (feem ntau ntawm 20 "mus txog 100" lossis ntau dua).
Kev hloov pauv siab hauv txoj kab uas hla - mus rau - phab ntsa thickness ua ke siv tib qhov dav ntawm sawb.
Cov spiral weld faib cov kev ntxhov siab nyob ib ncig ntawm qhov sib txawv piv rau cov seam ncaj.
Cov ntawv thov raug:
Tsawg- kis tau tus mob siab:Dej, dej phwj tuaj, slurry.
Structure Applications:Piling, kev txhawb nqa hauv paus, cov kab ke ua ke.
Fencing thiab moj khaum.
Nws yog feem ntautsis yogthawj qhov kev xaiv rau siab -siab, siab- kev ncaj ncees daim ntawv thov xws li cov roj thiab cov roj kis tau tus mob (qhov twg seamless los yog longitudinal seam DSAW kav), tshwj xeeb tshaj yog soj ntsuam thiab pom zoo.
3. Cov Txheej Txheem Tseem Ceeb (raws li ASTM A53)
Cov lus hauv qab no qhia txog cov kev cai tseem ceeb rauASTM A53 Qib Acov khoom thiab qhov dav dav ntawm SSAW yeeb nkab.
Table: Cov ntsiab lus ntawm ASTM A53 Qib A Kauv SAW Pipe
| Qeb Parameter | Specification / Xav tau | Lus Ceeb Toom / Piav Qhia |
|---|---|---|
| Kev tswj hwm tus qauv | ASTM A53 / ASME SA53 | ASME SA53 yog ASME Boiler thiab Pressure Vessel Code txais yuav tus qauv no. |
| Khoom Qib | Qib A | Qeb zog qis dua piv rau Qib B. |
| Tensile zog | Ntau dua lossis sib npaug rau 330 MPa (48,000 psi) | Yam tsawg kawg yuav tsum tau. |
| Yield zog | Ntau dua lossis sib npaug rau 205 MPa (30,000 psi) | Yam tsawg kawg yuav tsum tau. |
| Chemical Composition (Max%) | Cov pa roj carbon (C): 0.25 | Cov tshuaj txwv tsis pub tsawg dua li Qib B. |
| Manganese (Mn): 0.95 | ||
| Phosphorus (P): 0.05 | ||
| Sulfur (S): 0.045 | ||
| Kev tsim khoom | Spiral (Helical) Submerged Arc Vuam (SSAW / HSAW) | Weld seam yog ib qho txuas txuas ntxiv. SAW txheej txheem ua kom muaj siab - vuam zoo. |
| Hom Loj Loj | Txoj kab uas hla:Loj, feem ntau ntawm 20 "mus rau 100+ ntiv tes (508mm - 2540mm+). Phab ntsa Thickness:Nws sib txawv, feem ntau ntawm 6mm txog 25mm+. |
Lub ntsiab kom zoo dua ntawm kauv txoj kev yog ua loj diameters. |
| Xaus Xaus | Plain End (PE) feem ntau yog. | Yuav beveled rau vuam yog tias tau teev tseg. |
| Txheej | Feem ntau muab los ua liab qab (dub) steel. | tuaj yeem raug coated sab nraud (piv txwv li, FBE, 3LPE) lossis sab hauv kab raws li qhov yuav tsum tau ua. |
| Hydrostatic Test | Yuav tsum tau ASTM A53. | Txhua qhov ntev ntawm cov yeeb nkab yog ntsuas siab rau qhov ntsuas ntsuas siab. |
| Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT) | Lub vuam seam yog 100% tshuaj xyuas, feem ntau los ntawm Ultrasonic Testing (UT) lossis X-ray tshuaj xyuas. | Qhov tseem ceeb rau kev ruaj ntseg weld. SAW txheej txheem yog automated thiab zoo ib yam. |
4. Kev txiav txim siab tseem ceeb
Cov Lus Qhia Ntxiv:Rau cov ntawv thov tseem ceeb, cov kev xav tau ntxiv (piv txwv li,S1rau Charpy Impact Test,S4rau Ultrasonic Examination) hauv ASTM A53 tuaj yeem teev nyob rau hauv kev yuav khoom.
Straightening:SSAW cov kav dej feem ntau raug kho cov tshuab ncaj tom qab vuam, uas tuaj yeem ua rau qee qhov kev ntxhov siab.
Alternative Standards:Rau kev siv dej thiab dej khib nyiab,AWM C200yog ib qho kev qhia tshwj xeeb uas feem ntau hais txog ASTM cov ntaub ntawv zoo li A53 Qib A lossis B rau lub cev yeeb nkab.
Hauv cov ntsiab lus,ASTM A53 Qib A Spiral Submerged Arc Welded Yeeb Nkabyog ib qho kev lag luam, loj - txoj kab uas hla welded yeeb nkab tov rau cov qauv thiab qis rau nruab nrab - cov ntawv thov kev siv cov kua xa tawm, qhov tshwj xeeb zoo ntawm cov txheej txheem kauv yog xav tau.
