ASTM A252 yog tus qauv tshwj xeeb tsim los siv nrog cov yeeb nkab steel tubing.
ASTM A252 siv rau cov yeeb nkab pawg uas lub tog raj kheej steel ua raws li cov neeg nqa khoom mus tas li, lossis ua lub plhaub los tsim cov pob zeb hauv qhov chaw.
Qib 2 thiab qib 3 yog ob qib no.
A252 tau muab faib ua peb qib nrog cov khoom ua kom zoo dua qub.
Lawv yog: Qib 1, Qib 2, thiabQib 3.
Qib 2 thiab Qib 3 yog cov qib siv ntau tshaj plaws hauv ASTM A252, thiab peb piav qhia cov khoom ntawm ob qib kom ntxaws ntxiv tom ntej.
ASTM A252, ASTM A252tuaj yeem tsim los ntawm seamless, kuj welding, flash welding, lossis fusion vuam txheej txheem.
Hauv kev siv cov yeeb nkab, cov yeeb nkab steel seamless muab kev txhawb nqa zoo heev vim lawv lub zog siab thiab cov yam ntxwv tsis sib xws.
Tsis tas li ntawd, seamless steel raj tuaj yeem tsim nrog cov phab ntsa tuab heev, uas tso cai rau lawv tiv taus kev ntxhov siab ntau dua, ntxiv dag zog rau lawv txoj kev ntseeg siab hauv kev txhawb nqa.
Txawm li cas los xij, seamless steel kav tuaj yeem tsim tau mus txog qhov siab tshaj plaws ntawm txoj kab uas hla ntawm 660 mm, uas txwv tsis pub lawv siv hauv cov ntawv thov uas xav tau cov kab loj dua.Hauv qhov no,LSAW(Longitudinal Submerged Arc Welded) thiabSSAW(Spiral Submerged Arc Welded) steel kav yog qhov zoo dua.
Cov ntsiab lus phosphorus tsis tshaj 0.050%.
Tsis tas yuav tsum muaj lwm yam.
Tensile Strength thiab Yield Strength los yog Yield Point
| Qib 2 | Qib 3 | |
| Tensile zog, min | 60 000 psi[415 MPa] | 60 000 psi[415 MPa] |
| Yield point los yog Yield zog, min | 35 000 psi[240 MPa] | 45 000 psi[310 MPa] |
Elongation
Cov ntsiab lus tshwj xeeb tuaj yeem pom hauvASTM A252 Piled Pipe Paub meej.
| Sau npe | Xaiv | Scope |
| Qhov hnyav | Theoretical Nyhav | 95% - 125% |
| Sab nraud txoj kab uas hla | Specified Sab Nraud Diameter | ± 1% |
| Phab ntsa Thickness | teev nominal phab ntsa thickness | qis tshaj 87.5% |
| Ib leeg random lengths | 16 mus rau 25 ft [4.88 rau 7.62 m], nti |
| Muab ob npaug rau random lengths | tshaj 25 ft [7.62 m] nrog qhov nruab nrab yam tsawg kawg nkaus ntawm 35 ft [10.67 m] |
| Uniform ntev | ntev raws li tau teev tseg nrog kev tso cai hloov pauv ntawm ± 1 hauv. |
ASTM A370: Test Methods thiab Definition for Mechanical Testing of Steel Products;
ASTM A751: Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products;
ASTM A941: Cov ntsiab lus hais txog hlau, Stainless hlau, Cov Alloys, thiab Ferroalloys;
ASTM E29: Xyaum siv cov lej tseem ceeb hauv cov ntaub ntawv xeem los txiav txim siab ua raws li cov lus qhia tshwj xeeb;
Botop Steel yog ib tug zoo welded carbon steel yeeb nkab chaw tsim tshuaj paus thiab tsum los ntawm Tuam Tshoj, thiab kuj yog ib tug seamless steel yeeb nkab stockist, muab koj ib tug ntau yam ntawm cov yeeb nkab steel kev daws teeb meem!
