Chương 1a-cac khai niem co ban.pdf

8/11/2019 Chng 1a-cac khai niem co ban.pdf

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Chng 1KHI NIM C BN V NG NG

1.1 Vt liu ch to ng ng ng ng v cc ph kin ng ng thng

cchtotnhiuloivtliukhc nhau nh:

t st nung, ch, ng, ng thau, gang, thp,thp hpkim, nhm, chtdo,cao su, thytinh Lachnvtliuchtongnghpl l vn

quan trng mbo tnh an ton khi vnhnh v lich kinh t.

Trong cng nghip,ngngv phkincchtochyutthp cc-bon v thp hpkim


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1.2 Cc phng php ch to ng ng

Trong cng nghipc 3 cng nghcdngph bin ch to ng ng: Seamlesspipe; Butt-welded pipe; Spiral-welded pipe.

ngngcsnxutbngcc cng nghkhc nhau s c nhng c im khc nhaunh: bn,chiudy ng,tnh chtchngn

mn, giihnnhitv p sutlm vic


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1.2.1 Sn xut ng khng c mi hn

(Seamless pipe)


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Nguyn liusnxutl thp dngthic tit

dinngang l hnh trn.Snphml ngkhng c mihn, chiudi

ngkhngbgiihn.

Phngphp ny c thch tocngcchiu dy ln, nhng ng knh ngoi cangbhnch.

ngc cht lng tt,c th lm viciukinp sutv nhitcao.


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1.2.2 Sn xut ng c ng hn thng

(Butt-welded pipe)


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Nguyn liu sn xut ng l cc tm thp

phng.phng php ny cho snphm l ng c

mi hn thng, chiu dy v ng knh ngph thuc vo b dy v chiu rngca thptm.

Chtlngsnphmphthuchon ton vochtlngmihn.

Bdy v ngknh ngbbhnch


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1.2.3 Sn xut ng c mi hn vng

(Spiral-welded pipe)


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ngcsnxuttthp tmphng

ng c mi hn theo ng vng nn chiudi mihn ln

ngthngc chiudy nh,ngknh ln

v khng giihnchiudiChtlngngphthucvo chtlngmi

hn

ngcsdngtrong iukinnhitvp sut thng, dng vn chuyn cc michtkhng c tnh nmn.


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Sn phm ng c sn xut t 3 cng ngh trn


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1.3 Kch thc c trng ca ng

Kch thcngcctrngbingknhtrong (ID), ngknh ngoi (OD)


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1.4 Chiu dy ng (Wall thickness)

Chiudy cangl mtthng squan trngcangn clachnphthucvo iukin lm viccang (p sut,nhit, tnhchtcami trng)

Chiudy ngcquy nhtheo tiu chun:STD, XS, XXS.


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Bng ghi khch thc ca ng

Documents

Chương 1a-cac khai niem co ban.pdf