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ASTM A179 Cov khoom lag luam/A179M-90a(Reapproved 2001) Cold-drawn seamless me me steel raj rau cua sov exchangers thiab condensers |
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Scope |
1. Cov txheej txheem no siv rau cov khoom siv hluav taws xob sib hloov, cov condensers thiab cov khoom siv hluav taws xob zoo sib xws siv hauv cov phab ntsa nyias nyias seamless steel raj; 2. tus qauv no siv rau 3.2 ~ 76.2mm steel yeeb nkab. |
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Cov kev cai dav dav | Tsuas yog raws li tau muab tso rau hauv tus qauv no, tag nrho cov kev cai ntawm ASTM A450 / A450M yuav tsum tau ua. |
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Nto zoo | Tsis muaj hlau oxide, lwm qhov chaw zoo li ASTM A450 / A450M. |
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Qib thiab tshuaj muaj pes tsawg leeg (%) |
C Mn P S {{0}}. Lus Cim: Nws tsis tso cai rau muab cov qib alloy uas tshwj xeeb hu rau qhov sib ntxiv ntawm cov ntsiab lus uas tsis yog cov teev saum toj no. |
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Kev kho mob kub | Tom qab kev kos duab txias kawg, kev kho cua sov yog nqa tawm ntawm qhov kub tsis tshaj 650 degree. |
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Kev Xeem Hardness | HRB Tsawg dua lossis sib npaug rau 72, cov qauv yuav tsum tau ua rau txhua pawg ntawm cov yeeb nkab steel los ntawm ob qho qauv steel yeeb nkab rau Rockwell hardness test. (Lub thiaj li hu ua batch, hais txog tib lub cub tawg steel ntau lawm ntawm tib lub nominal txoj kab uas hla thiab phab ntsa thickness ntawm tag nrho cov steel yeeb nkab yam tsis txiav. lub sij hawm lub cub hluav taws kub kev kho mob ntawm cov yeeb nkab steel; cua sov lub sij hawm thiab tib lub cub tawg ceev rau kev kho cua sov ntawm tag nrho cov yeeb nkab steel.) |
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Flattening xeem | Cov txheej txheem raws li ASTM A450 / A450M, sampling rau txhua batch ntawm steel yeeb nkab los yog nws seem seem ntawm ob steel yeeb nkab txhua txiav cov qauv rau kev kuaj. (Ib pawg ntawm 250 tubes) |
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Flaring kev ua tau zoo | Cov txheej txheem raws li ASTM A450 / A450M, sampling rau txhua batch ntawm steel yeeb nkab los yog nws seem seem ntawm ob steel yeeb nkab txhua txiav cov qauv rau kev kuaj. (Ib pawg ntawm 250 tubes) |
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Kev ua haujlwm ntawm lub taub hau | S / D <10% of the steel pipe (S is the actual average wall thickness), such as the provisions of the crimp instead of flaring. Methods according to ASTM A450, sampling for each batch of steel pipe or its remaining part of the two steel pipe each cut sample for testing. Not belong to the above provisions of the steel pipe does not need to make crimping test. (A batch of 250 tubes) |
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Hydraulic xeem | Dej siab los ntawm ceg, yog hais tias tus xav tau sab pom zoo siv tsis-destructive hloov ntawm cov dej siab. Kev ntsuas tsis muaj kev puas tsuaj raws li ASTM A450 / A450M. |
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Cov khoom tiav tiav | Ntxiv rau ASTM A450 / A450M, suav nrog lub npe ntawm qhov xav tau sab thiab tus lej xaj. |
Specification rau ASTM A179 Seamless Tubes thiab Cov kav dej
Nov 25, 2024
Tso lus
