Cov khoom sib npaug thiab cov nqi tshwj xeeb ntawm L245 Steel Pipe
1. International Standard Equivalence
- API 5L Standard: L245 sib raug rau Qib B ntawm PSL1, ib qho khoom siv feem ntau siv rau cov kav dej roj thiab roj. Nws lub zog tensile Ntau dua los yog sib npaug rau 415 MPa thiab tawm lub zog ntau dua lossis sib npaug rau 245 MPa (cov ntaub ntawv los ntawm API 5L-2018 specification).
- ASTM Standard: Sib npaug rau ASTM A53 Qib B, feem ntau siv rau kev thauj mus los qis -, nrog lub zog tawm los ntawm 245 MPa (ASTM A53-2020).
- ISO 3183 Standard: Marked li L245NB lossis L245MB (N/M sawv cev rau kev xa khoom), nrog cov khoom siv kho tshuab raws li API 5L.
2. Qhov sib npaug hauv Suav Cov Qauv (GB / T)
- Hauv GB/T 9711-2017, L245 sib raug rau "L245R" lossis "L245N", qhov twg R qhia txog qhov kub dov thiab N qhia txog kev kho kom zoo. Nws cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab yog ua raws li cov qauv thoob ntiaj teb.
- Hauv GB/T 3091-2015 (Low-Pressure Fluid Transmission Pipes), cov khoom sib npaug yog Q235B. Txawm li cas los xij, nws yuav tsum raug sau tseg tias lub zog tawm ntawm Q235B yog 235 MPa, me ntsis qis dua li ntawm L245 (245 MPa).
Kev hloov pauv txoj hauv kev rau L245 thiab lwm yam khoom siv
1. Cov Ntsiab Cai ntawm Kev Hloov Siab
- Yog tias hloov L245, xyuas kom lub zog tawm los thiab lub zog tensile ntawm cov khoom tshiab tsis qis dua li qhov yuav tsum tau ua. Piv txwv li, ASTM A106 Qib B (yield zog Ntau dua lossis sib npaug ntawm 240 MPa) yog qhov siv tau, tab sis A106 Qib A (205 MPa) tsis siv tau.
2. Kev sib piv tshuaj lom neeg
- L245 muaj cov ntsiab lus carbon tsawg dua lossis sib npaug li 0.22% thiab cov ntsiab lus manganese tsawg dua lossis sib npaug li 1.2%, zoo ib yam li API 5L Qib B. Txawm li cas los xij, nco ntsoov qhov sib txawv ntawm cov sulfur thiab phosphorus cov ntsiab lus (ASTM A53 muaj cov txwv sulfur thiab phosphorus).
3. Daim ntawv thov tsim nyog
- Chemical Pipelines: ASTM A53 Qib B lossis GB/T 8163 20# steel tuaj yeem siv tau (qhov yuav tsum tau muaj zog pov thawj);
- Siab- Cov Kav Dej Siab Siab: API 5L PSL2 Qib B yog qhov nyiam vim nws qhov yuav tsum tau ua kom muaj zog ntxiv.
