1. Ububanzi nokuhlukaniswa

Inqubo Yokukhiqiza: Isebenza kumapayipi ensimbi ashiselwe njenge-electric resistance welding (ERW) kanye ne-submerged arc welding (SAW).

Ukuhlukaniswa: Kuhlukaniswe ku-Class A (izinga eliyisisekelo) kanye ne-Class B (izinga elithuthukisiwe) ngokuvumelana nokuqina kokuhlolwa. I-P355NH ivamise ukulethwa njenge-Class B.

2. Imibandela Yokulethwa Okujwayelekile

Ikhwalithi Yobuso: Awekho amaphutha njengokuqhekeka nokugoqa. Isikali se-oxide esincane sivunyelwe (asithinti ukuhlolwa).

Ukumaka: Ipayipi ngalinye lensimbi kufanele limakwe ngenombolo ejwayelekile, ibanga lensimbi (P355NH), usayizi, inombolo yesithando somlilo, njll. (EN 10217-1).

Ukubekezelelana kobukhulu (EN 10217-1)

Ipharamitha	Izidingo zokubekezelela Ikilasi B (zisebenza ku-P355NH)	Indlela yokuhlola (EN)
Ububanzi bangaphandle (D)	±0.75% D noma±1.0mm (inani elikhulu)	I-EN ISO 8502
Ubukhulu bodonga (t)	+10%/-5% t (t≤15mm)	Isilinganiso sobukhulu be-Ultrasonic (EN 10246-2)
Ubude	+100/-0 mm (ubude obulungisiwe)	Ukwakhiwa kwe-laser

 

Imininingwane yenqubo ebalulekile yepayipi lensimbi le-P355NH

1. Ukulawulwa kwenqubo yokushisela (EN 10217-3)

Ipayipi lensimbi le-ERW:

Ukwelashwa kokushisa okuku-inthanethi kuyadingeka ngemva kokushisela imvamisa ephezulu (ukushisa kokungeniswa ku-550~600℃nokupholisa kancane).

Ukulawulwa kwe-weld seam extrusion:≤10% ubukhulu bodonga (ukugwema ukuhlanganisa okungaphelele). 

SAW steel pipe: 

I-Multi-wire welding (2~4 izintambo), okokufaka ukushisa≤35 kJ/cm (ukuvimbela i-HAZ ukugqwala kokusanhlamvu). 

1. Imininingwane yokwelashwa kokushisa (EN 10217-3 + EN 10028-3)

Inqubo	imingcele	Inhloso
Ukulinganisa (N)	910±10℃×1.5min/mm, ukupholisa umoya	Hlunga okusanhlamvu kube yibanga le-ASTM 6~8
Ukunciphisa ingcindezi (SR)	580~620℃×2min/mm, ukupholisa isithando somlilo (≤200℃/h)	Susa ukucindezeleka okusalayo kwe-welding

3. Ukuhlola okungabhubhisi (EN 10217-1 + EN 10217-3)

Ukuhlolwa kwe-UT:

Ukuzwela:Φ3.2mm imbobo ephansi eyisicaba (EN ISO 10893-3). 

Ukumbozwa: 100% weld + 10mm impahla yomzali nhlangothi zombili. 

Ukuhlolwa komfutho wamanzi: 

Ingcindezi yokuhlola = 2×ingcindezi yokusebenza evumelekile (ubuncane be-20MPa, ukubamba ingcindezi≥15s).

Izidingo ezingeziwe zezicelo ezikhethekile

1. Ukuqina komthelela wezinga lokushisa eliphansi (-50℃)

Imigomo yesivumelwano eyengeziwe:

Amandla okuthinta≥60J (isilinganiso), isifanekiso esisodwa≥I-45J (EN ISO 148-1). 

Sebenzisa inqubo ye-Al+Ti ye-composite deoxidation ukuze unciphise okuqukethwe komoyampilo (≤30ppm). 

2. Amandla okumelana nezinga lokushisa eliphezulu (300℃)

Ukuhlolwa okungeziwe:

10^5 amahora ukukhasa amandla okuphuka≥150 MPa (ISO 204).

Idatha yezinga lokushisa eliphezulu (Rp0.2@300℃≥300 MPa) iyadingeka.

3. Izidingo zokumelana nokugqwala

Inqubo yokuzikhethela:

Ukuchama kwangaphakathi odongeni (izinga le-Sa 2.5, EN ISO 8501-1).

Udonga lwangaphandle lumbozwe nge-Zn-Al alloy (150g/m², Isijobelelo B se-EN 10217-1).

Amadokhumenti Ekhwalithi Nesitifiketi (EN 10217-1)

Isitifiketi Sokuhlola:

I-EN 10204 3.1 Isitifiketi (ukuzihlola kwesitshalo sensimbi) noma 3.2 Isitifiketi (isitifiketi somuntu wesithathu).

Kumele kufake: ukwakheka kwamakhemikhali, izakhiwo zemishini, imiphumela ye-NDT, ijika lokwelapha ukushisa.

Ukumaka okukhethekile:

Amapayipi okushisa aphansi amakwe ngokuthi "LT" (-50℃). 

Amapayipi okushisa aphezulu amakwe ngokuthi "HT" (+300℃).

Izinkinga ezivamile nezisombululo

Inkinga Yokwenzekayo	Ukuhlaziywa kwembangela	Izixazululo (Ngokusekelwe Emazingeni)
Amandla omthelela anganele we-welds	izinhlamvu ze-HAZ ezimahhadla	lungisa okokufaka ukushisa kwe-welding≤25 kJ/cm (EN 1011-2)
Ukuvuza kokuhlolwa kwe-Hydraulic	Imingcele engalungile yomshini wokuqondisa	Ukuhlolwa kabusha kwe-UT kwaso sonke isigaba samapayipi + nokuhlolwa kwe-radiographic yendawo (EN ISO 10893-5)
Ukuchezuka kwe-Dimensional (i-ovality)	Imingcele engalungile yomshini wokuqondisa	Ukuqondisa kabusha (EN 10217-1)

Ngokuhlanganisa imigomo ejwayelekile ye-BS EN 10217-1 nezidingo ezikhethekile ze-BS EN 10217-3, ikhwalithi yayo yonke inqubo yepayipi lensimbi le-P355NH ukusuka ekukhethweni kwezinto ezibonakalayo kuya ekwamukelweni komkhiqizo ophelile lingalawulwa ngokugcwele. Lapho uthenga, kunconywa ukucaphuna ngokucacile inguqulo evamile (efana ne-BS EN 10217-3:2002+A1:2005) kanye nezivumelwano zobuchwepheshe ezengeziwe (ezifana -50℃izidingo zomthelela) kunkontileka.