ASTM A672 C70 CL22 EFW Pipes piav qhia
ASTM A672 C70 CL22 yog qhov nruab nrab - thiab siab -siab carbon steel siab-cov kabmob welded yeeb nkab ua raws li Asmeskas cov qauv:
C70: Cov khoom siv qib (carbon manganese steel nrog qhov tsawg kawg nkaus tawm lub zog ntawm 485 MPa / 70 ksi).
CL22: Kev tsim khoom thiab tshuaj xyuas qib (Class 22), qhov nruab nrab - mus rau siab - theem tswj tus qauv.
Txheej Txheem: Tsim los siv submerged arc vuam (SAW) lossis electrofusion vuam (EFW), nrog rau kev ua haujlwm zoo li qub kom ntseeg tau tias qhov kub siab ua haujlwm siab.
ASTM A672 gr c70 cl22 yeeb nkab Chemical Composition
|
Specification |
Qib hlau |
Tshuaj muaj pes tsawg leeg |
Lus hais |
|||||
|
C |
Si |
Mn |
P |
S |
Ti |
|||
|
Cov kav dej rau kev pabcuam siab ASTM A671, A672, ASTM A671 thiab A672 |
CC70/C70 |
0.27 |
0.13 ~0.45 |
0.79 ~1.30 |
0.035 |
0.035 |
- |
A671/ A672 |
A672 Qib C70 22 Pipes Mechanical Properties
|
Cov khoom |
Qib Steel |
BASE METAL MECHANICAL COMPOSITION |
Vuam taw tes tensile zog (N / mm2) |
Lus hais |
|||
|
Qhov taw qhia tawm (N / mm2) |
Tensile zog (N / mm2) |
Xeem Daim |
Elongation (%) |
||||
|
Cov kav dej rau kev pabcuam siab ASTM A671, A672 |
CC70/C70 |
260 |
485~620 |
- |
21 |
485~620 |
A671/ A672 |
Daim ntawv thov
CL22-qib cov kav dej tau tsim los rau nruab nrab-siab siab thiab siab kub uas tsis muaj kev pabcuam hnyav. Cov haujlwm tseem ceeb suav nrog:
1. Petrochemical Engineering
Refineries:
Piping rau Hydrodesulfurization (HDS) units (Hloov tsawg dua lossis sib npaug li 15 MPa, Kub Tsawg dua lossis sib npaug li 350 degree)
Ethylene cog:
Nruab nrab-siab cov kab xa hluav taws xob (2.5–6.4 MPa, 300–400 degree)
2. Lub Zog & Zog
Thermal Power Plants:
Boiler feedwater pipelines (Nias Tsawg dua los yog sib npaug rau 12 MPa, Kub Tsawg dua lossis sib npaug li 250 degree)
Gas Turbines:
Thaum tshav kub kub exchangers nyob rau hauv khib nyiab tshav kub rov qab systems
3. Industrial Systems
Fertilizer Nroj Tsuag:
Piping rau syngas compressor units
Cua Separation Units:
Nruab nrab -pressure nitrogen hloov kav
Kev kuaj thiab tshuaj xyuas
Ntim thiab shipping
