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API 5L X80QS PSL2 seamless steel yeeb nkab yog asiab-lub zog qis- alloy (HSLA)pipeline solution engineered raukev pabcuam qaub(H₂S{0}}muaj) roj thiab roj ib puag ncig. Tsim los rau API Spec 5L (46th Edition) PSL2 cov cai, nws xalub zog tshwj xeeb, qis-kub toughness, thiab tiv thaiv hydrogen -induced cracking (HIC) thiab sulfide stress cracking (SSC). Lub "X80" qhia txog qhov tsawg kawg nkaus tawm lub zog ntawm 80 ksi (551 MPa), thaum "QS" qhiazoo qaubkev ua raws cai.

1.Dimensional Range & Tolerances:
-Oter Diameter: 168.3 mm (NPS 6) – 610 mm (NPS 24).
- Phab ntsa Thickness: 6.35 mm (SCH 40) – 25.4 mm (SCH 160).
-Standard Ntev: 6 m - 12 m; kev cai ntev muaj.
-Other Diameter kam rau ua: ± 1% ntawm nominal OD.
-Pall Thickness kam rau ua: -12.5% / +15% ntawm nominal WT.
-Weight kam rau ua: +10% / -5% ntawm qhov hnyav theoretical.

2.End Finish & Nto:

-Pib xaus: Plain kawg (PE), beveled kawg (BE) rau API 5L.

-Ntoo Condition: Liab qab, dub kua roj vanish, los yog anti{0}}corrosion txheej (ib thov).

- Ntim: Bundled nrog steel hlua; cim nrog tus lej kub, qhov loj me, qib, thiab API logo.

3.Testing & Inspection:
-Tensile Test: 1 xeem ib lub tshav kub (longitudinal/transverse).
-Charpy Impact Test: -40℃, 3 qauv rau ib lub tshav kub.
-Hardness Test: 100% Brinell/HV10.
-Hydrostatic Test: 100% kev ntsuas siab (ib API 5L).
-NDT: 100% ultrasonic kuaj (UT) rau lub cev; xaiv qhov ntsuas hluav taws xob (RT).
-Kev kuaj corrosion: HIC (NACE TM0284) thiab SSC (NACE TM0177) ib pob.

Technical Data

# Chemical Composition (Kev Ntsuas Kub, wt%)

Element	Kev xav tau
Cov pa roj carbon (C)	Tsawg dua lossis sib npaug li 0.12
Manganese (Mn)	1.60–1.85
Silicon (Si)	Tsawg dua lossis sib npaug li 0.45
Phosphorus (P)	Tsawg dua lossis sib npaug li 0.020
Sulfur (S)	Tsawg dua los yog sib npaug li 0.005
Niobium + Vanadium + Titanium	Tsawg dua los yog sib npaug li 0.15
Carbon sib npaug (Pcm)	Tsawg dua lossis sib npaug li 0.23

#Mechanical Properties (yam tsawg kawg nkaus)

Khoom	Chav tsev	Tus nqi
Yield zog (Rp0.2)	MPa (ksi)	551–758 (80–110)
Tensile zog (Rm)	MPa (ksi)	620–825 (90–120)
Yield-rau-Tensile Ratio	–	Tsawg dua lossis sib npaug li 0.93
Elongation (50.8 hli ntsuas)	%	Ntau dua lossis sib npaug li 18
Charpy Impact Zog (-40 degree)	J	Nruab Nrab Ntau dua lossis sib npaug rau 40; Ib Leeg Loj dua lossis sib npaug rau 35
Hardness	HB (HV10)	Tsawg dua lossis sib npaug li 248

Daim ntawv thov

-Kev thauj roj / Roj: Onshore thiab offshore pipelines hauv H₂S- muaj cov teb.

-High-Hloov kis: Ntev- kab hauv kab (Ntau dua lossis sib npaug rau 10 MPa kev khiav hauj lwm siab).

-Arctic & Cold Regions: Cov kav dej hauv qhov chaw qis - qhov kub thiab txias (-40℃).

-Kev sib sib zog nqus-Hiav txwv Pipelines: Subsea tej yaam num yuav tsum muaj siab toughness thiab corrosion kuj.

FAQ

Q1: "X80QS" txhais li cas?
A1: "X80"=yam tsawg kawg nkaus yield zog ntawm 80 ksi (551 MPa); "QS" =Kua qaub, qhia txog kev ua raws li cov kev pabcuam qaub (H₂S) los ntawm kev xeem HIC/SSC.
Q2: Qhov txawv ntawm PSL1 thiab PSL2 rau X80 yog dab tsi?
A2: Ib API 5L (54th Edition),X80 tsuas yog muaj nyob hauv PSL2.PSL2 tswj xyuas cov tshuaj nruj dua, 100% UT, qis- ntsuas qhov kub thiab txias, thiab tag nrho traceability- tseem ceeb rau siab - kev siv zog thiab qaub.
Q3: X80QS puas tuaj yeem siv tsis yog- qhov chaw qaub?
A3: Yog. Thaum ua kom zoo rau kev pabcuam qaub, X80QS lub zog siab thiab tawv tawv ua rau nws haum rau siab -siab, qis- kub, lossis tseem ceeb tsis yog- cov haujlwm qaub (xws li dej tob, Arctic).
Q4: Qhov kev ntsuam xyuas corrosion tseem ceeb rau X80QS yog dab tsi?
A4: Ob qhov kev xeem yuav tsum tau ua:
HIC Test (NACE TM0284):96-teev raug pH 3.5 tov; tawg ntev / dav / rhiab heev ratios Tsawg dua los yog sib npaug li 10%.
SSC Test (NACE TM0177): 72-teev kev ntsuas kev ntxhov siab hauv H₂S-saturated tov; tsis tawg ntawm 80% ntawm qhov tseeb tawm los.
Q5: Lub sijhawm xa khoom twg kuv tuaj yeem xav tau rau X80QS PSL2?
A5: Lub sij hawm ua tus qauv yog 45-60 hnub (vs . 25-35 hnub rau PSL1). PSL2 yuav tsum tau kuaj ntxiv (kev cuam tshuam, corrosion) thiab cov ntaub ntawv. Rush xaj (30-40 hnub) muaj rau cov haujlwm tsim nyog.
Q6: Yuav ua li cas txheeb xyuas X80QS PSL2 ua raws?
A6: Xav kom tus neeg muag khoom muab:
Siv tau API 5L Monogram Certificate.
Material Test Report (MTR)nrog cov xov tooj cua sov, cov ntaub ntawv tshuaj lom neeg / tshuab, thiab cov txiaj ntsig kev xeem.
Thib peb-Kev Tshuaj Xyuas Ib Tug (TPI)cov ntawv ceeb toom (piv txwv li, SGS, BV) rau kev kuaj corrosion thiab tshuab.