Cov qauv tseem ceeb thiab qib steel rau alloy yeeb nkab fittings
1, International Core Standard System (ASTM series)
1. Kub kub alloy yeeb nkab fittings (tsim rau thermal zog thiab petrochemical siab -kub pipelines)
|
Txuj No. |
Qib |
Hom haum |
Core Performance |
Daim ntawv thov Scenario |
|
ASTM A335 (Pib) |
P1 |
Seamless Alloy Yeeb Nkab |
Chromium{0}}molybdenum low alloy, temp Tsawg dua lossis sib npaug li 450 degree |
Boiler superheaters, nruab nrab-kub nruab nrab- cov kav dej siab |
|
P11 |
Seamless Alloy Yeeb Nkab |
Cr-1.25%, Mo-0.5%, creep-resistant |
Refinery rhaub pipelines |
|
|
P12 |
Seamless Alloy Yeeb Nkab |
Chromium-molybdenum alloy, nqi- zoo |
Tshuaj lom neeg siab -kub nruab nrab kev thauj mus los pipelines |
|
|
P22 |
Seamless Alloy Yeeb Nkab |
Cr-2.25%, Mo-1.0%, siab zog |
Ultra-supercritical thermal hwj chim pipelines, hydrogenation units |
|
|
P91 |
Seamless Alloy Yeeb Nkab |
Martensitic tshav kub-resistant steel, temp Tsawg dua los yog sib npaug rau 650 degree |
Ultra-supercritical unit main steam pipelines |
|
|
ASTM A234 (Tshooj) |
WP1/WP11/WP12/WP22/WP91 |
Lub luj tshib, tees, reducers |
Matches ASTM A335 kav, weldability zoo heev |
High -kub pipeline system connectors |
|
ASTM A182 Flanges thiab Forgings |
F1/F11/F12/F22/F91 |
Flanges, qhov (socket) weld fittings |
Forged alloy steel, txhim khu kev qha sealing kev ua tau zoo |
Siab - kub siab - siab flange kev sib txuas |
1.2 Alloy Yeeb Nkab Fittings rau qis-Kev siv kub
(Suitable rau LNG, cov khoom siv cryogenic)
|
Txuj No. |
Qib |
Hom haum |
Core Performance |
Daim ntawv thov Scenario |
|
ASTM A333 (Tshooj) |
Gr.6 |
Seamless Alloy Yeeb Nkab |
Nickel alloy reinforcement, temp Ntau dua los yog sib npaug rau -45 degree |
LNG tsheb thauj mus los pipelines, LNG cia tank exports |
|
Gr.3 |
Seamless Alloy Yeeb Nkab |
Tsawg- qhov kub thiab txias cuam tshuam qhov hnyav dua lossis sib npaug li 27J |
Tub yees system pipelines |
|
|
ASTM A420 (Tshooj) |
WPL6/WPL3 |
Lub luj tshib, tees |
Matches ASTM A333 cov kav dej, tsis muaj kev pheej hmoo tawg |
Cryogenic nruab nrab thauj khoom fittings |
|
ASTM A350 (Flanges) |
LF2/LF3 |
Forged Flanges |
Zoo heev tsawg-kub toughness, kev nyuaj siab corrosion kuj |
Tsawg-kub pipeline flange txuas |
1.3 Corrosion-Resistant Alloy Pipe Fittings
(Suitable rau chemical engineering, marine ib puag ncig)
|
Txuj No. |
Qib |
Hom haum |
Core Performance |
Daim ntawv thov Scenario |
|
ASTM A312 (Tshooj) |
TP 304/304L |
Austenitic Stainless hlau yeeb nkab |
Cr18%, Ni8%, dav corrosion kuj |
Tshuaj lom neeg acid/alkali nruab nrab thauj |
|
TP 316/316L |
Austenitic Stainless hlau yeeb nkab |
Mo ntxiv, chloride ion corrosion kuj |
Offshore platform pipelines, kev kho brine |
|
|
TIAB SA 321 |
Austenitic Stainless hlau yeeb nkab |
Titanium stabilization, intergranular corrosion kuj |
High -kub corrosive ib puag ncig (xws li, nitric acid nroj tsuag) |
|
|
ASTM A403 (Tshooj) |
WP304/WP316/WP321 |
Lub luj tshib, flanges, yeeb nkab txhawb nqa |
Matches ASTM A312 kav, zoo ib yam corrosion kuj |
Corrosive nruab nrab pipeline connectors |
|
Tshwj xeeb Alloys |
Ib 625 |
Seamless Fittings |
Nickel{0}}raws li alloy, tsis tshua muaj corrosion kuj |
Cov kua qaub muaj zog, siab -kub siab -siab corrosive ib puag ncig |
Core Domestic Standard System (GB / T Series)
2.1 Steel Butt-Welding Fittings (Tshuaj Standard GB/T 13401-2025)
Kev Hloov Kho Tseem Ceeb: Ntxiv 9 qib tshiab cov khoom siv hlau (xws li P91 / P92 siab-cov hlau alloy), ua raws li cov qauv ASTM thoob ntiaj teb, txhawb cov xwm txheej tshwm sim xws li sib sib zog nqus- roj av hiav txwv thiab ultra{5}} lub zog hluav taws xob siab.
Cov ntsiab lus tseem ceeb Qib:
16Mn (Low Alloy) → Raws li ASTM A335 P1, haum rau boilers thiab siab hlab ntsha;
15CrMo (Chromium-Molybdenum Steel) → Ua raws li ASTM A335 P12, haum rau siab -kub cov kav dej;
12Cr1MoV (High-Strength Alloy) → Ua raws li ASTM A213 T11, haum rau cov kav dej loj thermal;
Yam yuav tsum tau muaj: Kev cuam tshuam rau cov khoom siv rau qhov qis - qhov kub thiab txias (tsawg dua lossis sib npaug rau -196 degree) Ntau dua lossis sib npaug rau 27J; austenitic stainless hlau fittings yuav tsum tau soj ntsuam qhov loj me me.
2.2 Alloy Steel Flange Standards (GB/T 9124.2-2019)
Scope of Application: Tag nrho - txheej txheem specifications rau cov ntaub ntawv, manufacturing, thiab tshuaj xyuas ntawm alloy steel flanges, kom ntseeg tau kev twb kev txuas nyob rau hauv siab - kub thiab corrosive tej yam kev mob.
Core Material Requirements:
Chromium-Molybdenum Steel Series: Tswj Cr cov ntsiab lus (1.25%-2.25%) thiab Mo cov ntsiab lus (0.5%-1.0%) los txhim kho qhov kub thiab txias tsis kam;
Tsawg-Tsuas Kub Alloys: Ntxiv nickel cov ntsiab lus kom ntseeg tau tias qis- kub cuam tshuam lub zog ua tau raws li cov qauv thiab zam kev tawg tawg;
Kev soj ntsuam yuav tsum tau xeem ultrasonic (sab hauv qhov tsis xws luag), sib nqus particle / nkag mus kuaj (surface defects), nrog dimensional kam rau ua thiab sealing nto roughness nruj me ntsis raws qib siab.
Cov ntsiab cai tseem ceeb rau kev xaiv qib
Working Condition Matching: Prioritize P11/P22/P91 grades for high temperatures (>400 degree); xaiv ASTM A333 Gr.6 / A420 WPL6 rau qhov kub thiab txias (degree); xaiv 316L / Inconel 625 rau corrosive ib puag ncig.
Standard Coordination: Cov kav dej, fittings, thiab flanges yuav tsum ua raws li cov txheej txheem tib yam (piv txwv li, ASTM lossis GB / T) kom tsis txhob vuam tsis ua haujlwm los ntawm qib tsis sib haum.
Kev koom ua ke thoob ntiaj teb: Ua ntej ASTM cov qauv rau kev xa tawm (xws li ASTM A234 WP series); Cov haujlwm hauv tsev tuaj yeem txais GB / T 13401-2025 (ua raws li ASME B16.9).
Daim ntawv qhia ceev ntawm Cov Qib Siab
|
Qib steel hauv tsev |
International Cov Qib Kawm |
Standard Basis |
Daim ntawv thov |
|
20# |
ASTM A106 Gr.B |
GB/T 8163 |
Nruab nrab-Tshooj Kub Nruab Nrab-Cov kav dej siab |
|
16 Mn |
ASTM A335 P1 |
GB/T 13401-2025 |
Boilers, Siab Vessels |
|
15 CrMo |
ASTM A335 P12 |
GB/T 9948 |
Siab -Tub Nroj Nroj Tsuag |
|
12Cr1MoV |
ASTM A213 T11 |
GB/T 5310 |
Main Thermal Power Pipelines |
|
09 Mn NIM |
ASTM A333 Gr.6 |
GB/T 18984 |
LNG Tsawg-Cov kav dej kub |
