ASTM A179 (ASME SA179) ndi chubu chachitsulo chopanda mpweya chokokedwa ndi mpweya wozizira chomwe chimagwiritsidwa ntchito mu zosinthira kutentha, zoziziritsa kutentha, ndi zina zotero.
ASTM A179 ndi ASME SA179 ndi miyezo iwiri yomwe ndi yofanana kotheratu. Pofuna kupangitsa kuti zinthu zikhale zosavuta, ASTM A179 ikugwiritsidwa ntchito pansipa.
ASTM A179 ndi yoyenera mapaipi achitsulo okhala ndi mainchesi akunja a 1/8″ – 3″ [3.2mm - 76.2mm].
Chitsulo cha Botopndi kampani yogulitsa mapaipi achitsulo chosasunthika yochokera ku China, yomwe imakupatsani mitundu yambiri ya mapaipi achitsulo chosasunthika okwera bwino a ASTM A179/ASME SA179.
Tadzipereka kupatsa makasitomala athu zinthu ndi ntchito zabwino kwambiri kuti mapulojekiti anu ayende bwino. Sankhani Botop Steel, ndipo sankhani mnzanu wodalirika.
Tanena kale kuti A179 imapangidwa pogwiritsa ntchito njira yopangira yopanda zingwe yokokedwa ndi ozizira. Kodi njira zenizeni zomwe zimagwiritsidwa ntchito popanga yopanda zingwe yokokedwa ndi ozizira ndi ziti? Chonde onani tchati chotsatira cha njira yogwirira ntchito.
Muyeso wa ASTM,A556Imagwiritsanso ntchito njira yopangira yopanda mipata yokokedwa ndi ozizira koma makamaka ya ma heater amadzi okhala ndi machubu. Amene akufuna kudziwa zambiri angapeze zambiri.
Pambuyo pojambula komaliza kozizira, machubu achitsulo amatenthedwa kutentha pa kutentha kwa 1200°F [650°C] kapena kupitirira apo.
| Muyezo | C | Mn | P | S |
| ASTM A179 | 0.06-0.18% | 0.27-0.63% | 0.035% payokha | 0.035% payokha |
ASTM A179 silola kuwonjezera zinthu zina ku mankhwala.
Kulimba kwa chubu chachitsulo sikuyenera kupitirira 72 HRBW (Rockwell hardness).
| Kulimba kwamakokedwe | Mphamvu yobereka | Kutalikitsa | Mayeso Ophwanyika | Mayeso Oyaka | Mayeso a Flange |
| mphindi | mphindi | mu 2 inchi kapena 50 mm, mphindi | |||
| 47 ksi [325 MPa] | 26 ksi [180 MPa] | 35% | Onani ASTM A450, Gawo 19 | Onani ASTM A450, Gawo 21 | Onani ASTM A450, Gawo 22 |
Chitoliro chilichonse chiyenera kuyesedwa ndi kuthamanga kwa madzi kapena, ngati wogula atsimikiza, chiyeso chamagetsi chosawononga chingagwiritsidwe ntchito m'malo mwake.
Chubu chachitsulo chimasunga kupanikizika kwa masekondi osachepera 5 popanda kutuluka.
Kupanikizika kwa mayeso kumawerengedwa pogwiritsa ntchito njira iyi:
Ma Inchi - Mapaundi Mayunitsi: P = 32000 t/D
Mayunitsi a SI: P = 220.6t/D
P = kuthamanga kwa mayeso a hydrostatic, psi kapena MPa;
t = makulidwe a khoma otchulidwa, mkati kapena mm;
D = m'mimba mwake wakunja, mkati kapena mm.
Chotsatirachi ndi phukusi lodziwika bwino la A179, ndipo phukusi lopangidwa mwamakonda lingaperekedwenso malinga ndi zofunikira za polojekiti.
Chitoliro chopanda kanthu, chophimba chakuda (chosinthidwa);
Masayizi 6" ndi pansi M'mabokosi okhala ndi zingwe ziwiri za thonje, masayizi ena osamasuka;
Mapeto onse awiri ali ndi zotetezera kumapeto;
Mapeto osalala, mapeto a bevel;
Kulemba.
