ASTM A671 CJP 115 Chav Kawm 20 Hlau Yeeb Nkab

1. ASTM A671 CJP115 Chav Kawm 20 yog dab tsi?

A siab -kev ua tau zoo sib txawvntawm hluav taws xob-fusion-welded (EFW) carbon steel yeeb nkab tsim rauultra-siab- kev pabcuam cryogenic:

CJP 115: Qhia meej txog chemistry (C Tsawg dua lossis sib npaug rau 0.30%, Mn Tsawg dua lossis sib npaug li 1.20%) nrog yuav tsum tau ua-115℃F (-82 degree) Charpy impact testing

Chav Kawm 20: Yuav tsum tau2,000 psi (13.8 MPa) hydrostatic test siab(Qhov siab tshaj plaws hauv ASTM A671 tus qauv)

Kev nce qib tseem ceeb: 54% kev ntsuas siab dua li Chav Kawm 13 (1,300 psi)

2. Dab tsi yog nws cov khoom siv kho tshuab tseem ceeb?

Lub zog:

Tawm tswv yim: Ntau dua lossis sib npaug rau 35 ksi (240 MPa)

Tensile: 60-85 ksi (415-585 MPa)

Toughness:

Charpy V-notch: Min 20 ft-lb (27 J) ntawm -115℃F

Normalization + tempering kev kho cua sov yuav tsum tau

Ductility: Min 30% elongation hauv 2-nti ntsuas qhov ntev

3. Qhov twg yog qhov tshwj xeeb tshaj tawm?

LNG ncov-shaving nroj tsuagnrog siab -siab cia

Offshore Arctic gas kis tau tus mobsystems (Ntau dua lossis sib npaug rau 1,500 psi tsim siab)

Cryogenic hydrogen pipelineshauv cov phiaj xwm hloov hluav taws xob

Qhov chaw tso tawm qhov chawkua oxygen / nitrogen hloov kab

4. Dab tsi yog nws cov khoom tsim superlatives?

Vuam:

Triple -welded seams nrog100% automated UT + RT tshuaj xyuas

Weld kho txwv tsis pub ntawm cov khoom kawg

Khoom siv:

Nqus{0}}degassed steel nrog max0.015% sulfur / phosphorus

Phaj / coil tau los ntawm ASTM A537 Class 2 sib npaug

Kev sim:

Hydrostatic +Txhim kho Charpy xeem(3 qauv rau ib lub tshav kub)

5. Nws piv rau ASTM A106 Gr.B li cas?