I-ASTM A335 P5, eyaziwa nangokuthi i-ASME SA335 P5, iyipayipi lensimbi elingenamthungo elinomucu ophansi elenzelwe isevisi yokushisa okuphezulu.
I-P5 iqukethe i-chromium engu-4.00 ~ 6.00% kanye ne-molybdenum engu-0.45 ~ 0.65%, enikeza amandla nokusebenza okuhle kakhulu ngaphansi kwamazinga okushisa aphezulu kanye nokucindezela. Isetshenziswa kabanzi emishinini efana nama-boiler, ama-superheater, kanye nama-heat exchanger.
Isikhundla sayo se-UNS yi-K41545.
Umkhiqizi kanye Nesimo
Amapayipi ensimbi e-ASTM A335 P5 kumele enziwe ngenqubo engenamthungo futhi kufanele aqedwe ngokushisa noma adonswe ngokubandayo, njengoba kuchaziwe.
Amapayipi aqediwe ngokushisa angamapayipi ensimbi angenamthungo akhiqizwa ngama-billets ngezinqubo zokushisa nokugoqa, kuyilapho amapayipi adonswa ngokubandayo engamapayipi ensimbi angenamthungo akhiqizwa ngokudonsa amapayipi aqediwe ngokushisa ekamelweni.
Uma ungathanda ukufunda kabanzi ngezinqubo zokukhiqiza zalezi zinhlobo ezimbili zamapayipi ensimbi angenamthungo, ungachofoza"Iyini ipayipi lensimbi elingenamthungo?"ukuthola imininingwane eyengeziwe.
Ukwelashwa Kokushisa
Amapayipi e-ASTM A335 P5 kufanele aphinde afudunyezwe ukuze aphathwe ngokushisa futhi aphathwe ngokushisa yi-ukuncibilikisa okugcwele noma okungashisi kakhulu or ukwenza kube ngokwejwayelekile futhi kube nokulinganisela.
Izidingo ezithile ziboniswe kuthebula elingezansi:
| Ibanga | Uhlobo lokwelapha ukushisa | Ukufakwa Kwezinga Elingaphansi Kokubalulekile noma Ukushisa |
| I-ASTM A335 P5 | i-anneal egcwele noma engeyona eyethermal | — |
| ukwenza ngokwejwayelekile kanye nokushisa | 1250 ℉ [675 ℃] iminithi |
Imisebenzi ehilela ukushisa amapayipi ensimbi ngaphezu kwezinga lokushisa elibucayi, njengokushisela, ukufulela, kanye nokugoba okushisayo, kufanele ilandelwe ukwelashwa kokushisa okufanele.
Izindlela zokuhlola ukwakheka kwamakhemikhali kanye nezakhiwo zemishini zamapayipi ensimbi e-P5 kufanele zihambisane nezinhlinzeko ezifanele ze-ASTM A999.
| Ibanga | Ukwakheka, % | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P5 | Ubuningi obungu-0.15 | 0.30 ~ 0.60 | Ubuningi obungu-0.025 | Ubuningi obungu-0.025 | Umkhawulo ongu-0.50 | 4.00 ~ 6.00 | 0.45 ~ 0.65 |
Izakhiwo Zokunamathela
| Ibanga | Amandla Okudonsa | Amandla Okukhiqiza | Ukwelulwa ngamasentimitha ama-2 noma ama-50 mm |
| P5 | 60 ksi [415 MPa] min | 30 ksi [205 MPa] min | 30% iminithi |
Izakhiwo Zokuqina
Izinga le-ASTM A335 alisho noma yiziphi izidingo zokuqina kwamapayipi ensimbi e-P5.
Ukuhlolwa Kokuthamba
Ukuhlolwa kokuthamba kufanele kwenziwe futhi kuthathwe amasampula ngokuhambisana nezidingo ezifanele ze-ASTM A999, futhi iziphetho zamapayipi anqunyiwe zingasetshenziswa njengezibonelo.
Ukuhlolwa Kokugoba
Kumapayipi anobubanzi obudlula i-NPS 25 futhi anesilinganiso sobukhulu bodonga esingu-7.0 noma ngaphansi, kufanele ahlolwe ukugoba esikhundleni sokuhlolwa kokuthamba.
Amasampula okuhlolwa kokugoba kufanele agobe ekushiseni kwegumbi kuze kufike ku-180° ngaphandle kokuqhekeka ngaphandle kwengxenye egobile. Ububanzi bangaphakathi bokugoba kufanele bube yi-1 intshi. [25 mm].
Ukubukeka
Ubuso bombhobho wensimbi kufanele bube bushelelezi futhi bulingane, bungabi namabala, imithungo, ama-lap, ukudabuka, noma izingcezu.
Uma ukujula kwanoma yikuphi ukushiyeka kudlula u-12.5% wobukhulu bodonga obujwayelekile noma uma ukushuba kodonga okusele kungaphansi kobukhulu obubekiwe obuncane, indawo kufanele ibhekwe njengenephutha.
Uma ubukhulu bodonga obusele busengaphakathi kwemingcele ecacisiwe, iphutha lingasuswa ngokugaya.
Uma ubukhulu bodonga olusele bungaphansi kwesidingo esincane, iphutha kufanele lilungiswe ngokushisela noma lisuswe ngokusika.
Ukubekezelelana kobubanzi
Kumapayipi a-odwe yi-NPS [DN] noma ububanzi bangaphandle, ukwehluka kobubanzi bangaphandle akufanele kudlule izidingo eziboniswe kuthebula elingezansi:
| Umklami we-NPS [DN] | Izinguquko Ezivumelekile | |
| ku. | mm | |
| 1/8 kuya ku-1 1/2 [6 kuya ku-40], intshi. | ±1/64 [0.015] | ±0.40 |
| Ngaphezu kwe-1 1/2 kuya ku-4 [40 kuya ku-100], intshi. | ±1/32 [0.031] | ±0.79 |
| Ngaphezu kwamasentimitha angu-4 kuya kwangu-8 [100 kuya kwangu-200]. | -1/32 - +1/16 [-0.031 - +0.062] | -0.79 - +1.59 |
| Ngaphezu kuka-8 kuya ku-12 [200 kuya ku-300], intshi. | -1/32 - +3/32 [-0.031 - 0.093] | -0.79 - +2.38 |
| Ngaphezulu kwe-12 [300] | ±1% yobubanzi obungaphandle obucacisiwe | |
Uma ipayipi lihlelwe ububanzi bangaphakathi, ububanzi bangaphakathi akufanele buhluke ngaphezu kwe-1% kunobubanzi bangaphakathi obubekiwe.
Ukubekezelelana Kokujiya Kodonga
Ngaphezu komkhawulo ongabonakali wobukhulu bodonga lwepayipi obekwe umkhawulo wesisindo ku-ASTM A999, ubukhulu bodonga lwepayipi nganoma yisiphi isikhathi kufanele bube ngaphakathi kokubekezelelana okuchazwe kuthebula elingezansi:
| Umklami we-NPS [DN] | Ukubekezelelana, ifomu elingu-% elicacisiwe |
| 1/8 kuya ku-2 1/2 [6 kuya ku-65] kufaka phakathi zonke izilinganiso ze-t/D | -12.5 - +20.0 |
| Ngaphezulu kuka-2 1/2 [65], t/D ≤ 5% | -12.5 - +22.5 |
| Ngaphezulu kuka-2 1/2, t/D ＞ 5% | -12.5 - +15.0 |
| t = Ubukhulu Bodonga Obucacisiwe; D = Ububanzi Bangaphandle Obucacisiwe. | |
Amapayipi ensimbi e-ASTM A335 P5 asetshenziswa kakhulu ezinhlelweni zamapayipi ezisebenza ngaphansi kwezimo zokushisa okuphezulu kanye nokucindezela okuphezulu.
Ngenxa yokumelana kwazo okuhle kakhulu nokushisa okuphezulu kanye nezakhiwo zemishini, zisetshenziswa kabanzi embonini yamakhemikhali kaphethiloli, yokuphehla ugesi, kanye neyezindawo zokuhluza.
Izinhlelo zokusebenza ezithile zifaka:
- Amapayipi ebhoyila
- Izishintshi zokushisa
- Imigqa yenqubo ye-Petrochemical
- Amapayipi esitshalo sikagesi
- Imikhumbi yokucindezela kwebhoyila
| I-ASME | I-ASTM | EN | I-JIS |
| I-ASME SA335 P5 | I-ASTM A213 T5 | I-EN 10216-2 X11CrMo5+I | I-JIS G 3458 STPA25 |
Izinto:Amapayipi ensimbi angenamthungo e-ASTM A335 P5 kanye nokufakwa kwawo;
Usayizi:1/8" kuya ku-24", noma ngezifiso ngokwezidingo zakho;
Ubude:Ubude obungahleliwe noma ukusika ngokwe-oda;
Ukupakisha:Ukugqoka okumnyama, iziphetho ezigobile, izivikelo zokuphela kwamapayipi, amabhokisi okhuni, njll.
Ukusekelwa:isitifiketi se-IBR, ukuhlolwa kwe-TPI, i-MTC, ukusika, ukucubungula, kanye nokwenza ngezifiso;
I-MOQ:1 m;
Imigomo Yokukhokha:I-T/T noma i-L/C;
Intengo:Xhumana nathi ukuthola amanani akamuva epayipi lensimbi le-T11.
