ASTM A 53 e koahela phala ea tšepe e se nang seam le e cheselitsoeng ka botenya ba lebota.Boemo ba bokaholimo hangata bo ntšo 'me phala ea ASTM A53 (eo hape e bitsoang phala ea ASME SA53) e etselitsoe lits'ebetso tsa mochini le khatello hape e amoheleha bakeng sa ts'ebeliso e tloaelehileng ea mouoane, metsi, khase le moea.E loketse bakeng sa ho tjheseletsa le bakeng sa ho etsa mesebetsi e amanang le ho kokota, ho kobeha, le flanging.A53 seamless steel tube ke thepa ea American standard steel pipe.Mokhoa o ka sehloohong oa tlhahiso ea li-tubes tsa tšepe tsa A53 tse seamless li arotsoe ka ho taka ho batang le ho bilika ho chesang.Phapang e ka sehloohong pakeng tsa tse peli ke hore mokhoa oa tlhahiso ea liphaephe tse batang tse se nang seamless hangata o rarahane ho feta oa ho bilika ho chesang, 'me ponahalo ea phala e batang ea tšepe e se nang seamless e khutšoanyane ho feta ea ho bilika ho chesang.Lipeipi tse rokotsoeng tsa tšepe tse se nang moroko, botenya ba lebota la phala ea tšepe e kolobisitsoeng e batang e se nang moroallo hangata bo nyane ho feta ba lipeipi tsa tšepe tse seamless, empa bokaholimo bo shebahala bo khanya haholoanyane.Bokaholimo ba tube ea tšepe e kentsoeng ka carbon e batla e le mahoashe.Mokhoa o ka sehloohong oa tlhahiso o pota-potileng tube e se nang letho → ho futhumatsa → ho phunya → ho bilika ha skew ka meqolo e meraro, ho bilika ho tsoelang pele kapa extrusion → ho tlosoa ha tube → ho fokotsa boholo (kapa ho fokotsa bophara) → ho pholisa → ho otlolla → teko ea haeteroliki (kapa ho lemoha liphoso) → ho tšoaea → laebrari ea ho kenya.
| ASTM A53/ASME SA53 | Mofuta oa S | Mofuta oa E | Mofuta oa F | |||
| (e sa tsitsang) | (e chesetsoe ho hana motlakase) | (peipi e cheselitsoeng ka sebōpi) | ||||
| Kereiti A | Sehlopha sa B | Kereiti A | Sehlopha sa B | Kereiti A | ||
| Carbon max.% | 0.25 | 0.30* | 0.25 | 0.30* | 0.3 | |
| Manganese % | 0.95 | 1.2 | 0.95 | 1.2 | 1.2 | |
| Phosphorous, max.% | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | |
| Sebabole, max.% | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | |
| Koporo, boholo.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Nickel, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Chromium, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Molybdenum, max.% | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | |
| Vanadium, max.% | 0.08 | 0.08 | 0.08 | 0.08 | ||
| * Bakeng sa phokotso e 'ngoe le e 'ngoe e ka tlase ho 0.01% e ka tlase ho boholo ba carbon e boletsoeng, keketseho ea 0.06% ea manganese ka holimo ho palo e boletsoeng e tla lumelloa ho fihla ho boholo ba 1.65% (ha e sebetse ho SA53). | ||||||
| Litlhoko tsa Tensile | Seamless le Motlakase-ho hanyetsa-welded | Tsoelang Pele-Tšepetsoe | |
| Kereiti A | Sehlopha sa B | ||
| Tensile Strength, min., psi | 48,000 | 60,000 | 45,000 |
| Kotulo Matla, min., psi | 30,000 | 35,000 | 25,000 |
1. Mokhoa o ka sehloohong oa tlhahiso ea phala ea tšepe e se nang seamless e chesang e chesang (ts'ebetso e kholo ea tlhahlobo):
Tlhophiso e se nang letho → ho futhumatsa e se nang letho → ho phunya → ho roala → ho futhumatsa tšepe → e tsitsitseng (e fokotsoe) bophara → pheko ea mocheso △ → ho otlolla ha tube e phethiloeng → ho qetela → tlhahlobo (e sa senyeheng, 'mele le lik'hemik'hale, tlhahlobo ea Taiwan)→ polokelo ea thepa
2. Mokhoa o ka sehloohong oa tlhahiso ea liphaephe tsa tšepe tse kolobisitsoeng (tse huloang) tse batang:
Ho lokisoa ha billet → ho tlotsa ho tlotsa → ho phuthoa ho batang (setaelo) → pheko ea mocheso → ho otlolla → ho qetela → tlhahlobo
