1. Cov lus txhais & cov ntawv siv tseem ceeb
covASTM A252, ASTM A252: Cov txheej txheem tshwj xeeb rau piling steel kav, qhia welded / seamless yeeb nkab pawg rau axial cuam tshuam loads thiab av lateral siab (xws li, chaw nres nkoj foundations, excavation support). Cov kev cai tseem ceeb suav nrog khoov tsis kam (≤0.25% qhov ntev sib txawv) thiab geometric precision.
covASTM A500 1: Cov qauv tubing qauv rau txias - tsim welded / seamless carbon steel puag ncig, square, los yog cov kab plaub hau, muaj feem xyuam rau lub tsev thav duab, choj qauv, thiab machinery manufacturing. Nws muaj ntau qib zog (Gr.B/C) thiab cov kev xaiv seem.
2. Qhov tseem ceeb Performance Parameters
| covParametercov | covASTM A252, ASTM A252cov | covASTM A500 1cov |
|---|---|---|
| covQib zogcov | Gr.2 / Gr.3 (Yield ≥241MPa) | Gr.B/Gr.C (Yield ≥290/317MPa) |
| covCov Lus Qhia Tseem Ceebcov | Khoov kuj, straightness kam rau ua | Tshooj precision, weld zoo |
| covTej kev sivcov | Underground piling structures | Saum toj no - hauv av vaj tsev / tshuab |
| covManufacturing Focuscov | Kauv / SAW vuam txheej txheem | ERW/submerged -arc vuam |
| covFailure Criteriacov | Cov yeeb nkab buckling=tsis lees paub | Weld defects/size deviation=rejection |
3. Cov yam ntxwv ntawm cov khoom
covA252 Piping Pipes:
Yuav tsum tiv thaiv pawg tsav tsheb cuam tshuam (≥3-tuj rauj zog)
Yuav tsum muaj kev tiv thaiv corrosion (kub-dip zinc pom zoo)
Hom specs: Φ300-2000mm OD, 6-25mm phab ntsa thickness
covA500 Tus Qauv Tubing:
Haum rau static / dynamic loads (lub tsev luj / vibration)
Cov huab cua zoo dua (Gr.C nrog vanadium / nb alloy)
Feem ntau: 50 × 50mm txog 400 × 400mm square tubes
4. Cov Txheej Txheem Kev Xaiv Engineering
covTxoj Cai A252 rau:
Chaw nres nkoj pawg hauv paus (marine corrosion)
Seismic zone foundations (shear resistance)
Sib sib zog nqus excavation kev them nyiaj yug (av siab)
covNyiam A500 rau:
Steel tsev ncej (modular sib dhos)
Tshuab cuab yeej brackets (precision haum)
Choj tsis yog{0}} cov tswv cuab tseem ceeb
A252 Steel Pile Pipe Factory
