Lub steel yeeb nkab phab ntsa thickness series los ntawm British metrology chav tsev, thiab cov qhab nia yog siv los qhia qhov loj. Covphab ntsa thickness ntawm lubseamless yeeb nkab yog tsim los ntawm Schedule series (40, 60, 80, 120) thiab txuas nrog rau qhov hnyav series (STD, XS, XXS). Cov txiaj ntsig no tau hloov mus rau millimeters ua ib feem ntawm lub raj phab ntsa thickness series. (Ceeb Toom: Loj - tus nqi ntawm Schedule40 tsis tas li, tab sis saib ntawm lub taub sab nraud ntawm lub raj.)

Cov txheej txheem ntawm kev nthuav qhia cov yeeb nkab txoj kab uas hla thiab thickness, lub nominal txheej txoj kab uas hla thiab qhov tsawg kawg nkaus thickness ntawm cov yeeb nkab rau cov cua sov nto, NPS rau cov yeeb nkab yeeb nkab thiab lub sij hawm tus naj npawb ntawm cov yeeb nkab phab ntsa. Phab ntsa thickness series muaj 8 series ntawm 10 mus rau 20, 30, 40, 80, 120, 140, 160. Lub 40 series yog cov qauv series, lub 80 yog cov tuab series, thiab lub 120 yog lub thickness ntxiv. series.

Phab ntsa thickness ntawm American Standard thiab domestic standard yog txawv heev. Feem ntau, ob qib siab ntawm CL.150 thiab CL.300 tsis siab. Feem ntau, SCH10S thiab SCH40 yog siv. Tsawg tshaj 50 xaiv SCH80 thiab SCH40S.

SCH40, tube naj npawb, txawm tias nws yog domestic los yog txawv teb chaws, Sch.XX yog siv los qhia cov phab ntsa thickness ntawm cov yeeb nkab. GB / T81631 HG20553 kuj muaj nyob rau hauv lub teb chaws tus qauv GB / T81631 HG20553, thiab lwm yam., raws li tus txheej kab ntawm cov yeeb nkab los yog cov yeeb nkab loj, phab ntsa thickness sib txawv qhov ntau thiab tsawg qhia los ntawm tib cov yeeb nkab tooj sib txawv.

Txoj kev qhia cov phab ntsa thickness seamless steel yeeb nkab muaj peb txoj kev: yeeb nkab ntsuas qhov loj, steel yeeb nkab phab ntsa thickness dimension thiab yeeb nkab luj:

1) Phab ntsa thickness yog qhia los ntawm cov yeeb nkab tooj "Sch".
Cov yeeb nkab ntsuas tus lej yog qhov sib piv ntawm cov yeeb nkab tsim siab rau qhov tso cai rau kev ntxhov siab ntawm cov khoom ntawm qhov ntsuas kub tsim los ntawm 1000 thiab sib npaug. Namely: Sch=P/[σ]t × 1000
ANSI B36.10 phab ntsa thickness ntsuam xyuas: Sch10, Sch20, Sch30, Sch40, Sch60, Sch80, Sch100, Sch120, Sch140, Sch160 kaum qib;
ANSI B36.19 phab ntsa thickness qib: Sch5s, Sch10s, Sch40s, Sch80s plaub qib;

2) Raws li cov phab ntsa tuab ntawm cov yeeb nkab steel, Tuam Tshoj, ISO, Nyiv, qee cov qauv steel yeeb nkab tau txais yuav.

3) Lub thickness ntawm cov yeeb nkab phab ntsa yog qhia los ntawm qhov hnyav ntawm cov yeeb nkab, uas faib cov phab ntsa thickness ntawm cov yeeb nkab rau hauv peb hom:
ib. Standard luj raj, qhia nyob rau hauv STD
b thickened tube, qhia hauv XS
c. Cov raj tuab ntxiv, qhia los ntawm XXS.
Rau cov kav dej nrog DN ≤ 250mm, Sch40 yog sib npaug rau STD, DN < 200mm yeeb nkab, Sch80 yog sib npaug rau XS.