1. Dab tsi yog qhov tseem ceeb thoob ntiaj teb tus qauv rau SSAW kav hauv cov roj & roj?
API 5L / ISO 3183 / GB / T 9711 Cov ntawv pov thawjyog thawj tus txheej txheem tswj kav kab yeeb nkab rau kev thauj mus los hauv cov kav dej. Nws suav nrog ntau qib zoo thiab cov kev xav tau ntxiv rau cov kev pabcuam sib txawv-4.
2. Cov qib zoo sib txawv hauv API 5L/GB/T 9711 yog dab tsi?
Tus txheej txheem qhia ob theem tseem ceeb zoo:PSL 1(tus qauv xav tau) thiabPSL 2(ntau zog, nrog txhim kho toughness thiab kuaj). Nws kuj suav nrog cov ntawv txuas ntxiv ntxiv rau cov kev xav tau siab dua, xws li Annex G rautsis kam mus ductile tawg propagation(zoo ib yam li PSL 3) thiab Annex H raukev pabcuam qaub-4.
3. Cov kev cai tshwj xeeb twg siv rau SSAW kav rau "Sour Service"?
Rau cov cheeb tsam acidic uas muaj H₂S, Annex H ntawm GB / T 9711 ua rau muaj kev tswj hwm nruj, suav nrogCov ntsiab lus tsis tshua muaj sulfur (max 0.002%), suav nrog kev tswj kom zoo (piv txwv li, kev kho calcium), yuav tsumHIC (Hydrogen Induced Cracking)thiabSSC (Sulfide Stress Cracking)xeem, thiab hardness txwv-4.
4. Dab tsi yog "Manganese-Carbon (Mn/C) piv" lub tswv yim hauv cov raj xa dej?
Qhov no yog lub ntsiab lus tseem ceeb metallurgical qhov twg API 5L tso cai rau kev lag luam tawm -tawm: rau txhua tus0.01% txo qis hauv cov ntsiab lus carbon hauv qab qhov siab tshaj plaws, cov ntsiab lus Manganese tuaj yeem nce 0.05%. Qhov no ua rau txoj kev loj hlob ntawm lub zog siab dua nrog zoo weldability-4.
5. Vim li cas cov hlua txuas sab hauv yog qhov tseem ceeb rau cov kav dej SSAW?
Cov kauv sab hauv weld hlaws tuaj yeem tsim cov dej ntws tseem ceeb rau cov khoom siv tawm. Ib tug du, tswj cov hlaws profile yog qhov tseem ceeb rau cov kav dej nrogsab hauv txheejtxhawm rau txo kev sib txhuam, vim tias cov hlaws tseem ceeb tuaj yeem cuam tshuam cov txheej txheem thiab ua kom muaj zog siv zog thiab cov nqi khiav lag luam
