Njengepayipi elibalulekile lezokuthutha, amapayipi ensimbi angenamthungo asetshenziswa kakhulu ku-petroleum, igesi yemvelo, imboni yamakhemikhali, amandla kagesi nezinye izimboni. Ngesikhathi sokusetshenziswa, kufanele zihlolwe ngokuqinile ukuze kuqinisekiswe ikhwalithi nokuphepha kwepayipi. Lesi sihloko sizokwethula ukuhlolwa kwepayipi lensimbi engenamthungo kusuka ezicini ezimbili: izinto zokuhlola nezindlela.

Izinto zokuhlola zifaka umumo, usayizi, ikhwalithi yendawo engaphezulu, ukwakheka kwamakhemikhali, ukuqina, umthelela, ukucaba, ukuvutha, ukugoba, umfutho we-hydraulic, ungqimba oluqinile, njll.
Indlela yokuthola
1. Ukuhlolwa kwe-Tensile
2. Ukuhlolwa komthelela
3. Ukuhlolwa kokucaba
4. Ukuhlolwa kokunwetshwa
5. Ukuhlolwa kokugoba
6. Ukuhlolwa kwe-Hydraulic
7. Ukuhlolwa kwesendlalelo esifakwe uthayela
8. Ikhwalithi yobuso idinga ukuthi akumele kube khona imifantu ebonakalayo, ukugoqa, izibazi, ukusikeka kanye ne-delamination endaweni yangaphakathi nangaphandle yepayipi yensimbi.
Ngaphezu kwalokho, ukuhlolwa kuzokwenziwa ngokwezidingo zamakhasimende, njengeI-GB/T 5310-2017amapayipi ensimbi angenamthungo weama-boilers anengcindezi ephezulu.
Ukwakheka kwamakhemikhali: Insimbi ngokuyinhloko iqukethe izakhi ezifana ne-chromium, i-molybdenum, i-cobalt, i-titanium, ne-aluminium, engathuthukisa ukumelana nokushisa nokumelana nokugqwala kwensimbi.
Izici zemishini: Amandla okukhiqiza ≥ 415MPa, amandla aqinile ≥ 520MPa, ubude ≥ 20%.
Ukuhlolwa kokubukeka: Awekho amaphutha asobala, imibimbi, ukugoqa, imifantu, imihuzuko noma okunye ukukhubazeka kwekhwalithi ebusweni.
Ukuhlola okungabhubhisi: Sebenzisa i-ultrasonic, i-ray nezinye izindlela zokuhlola amapayipi ensimbi ukuze uqinisekise ukuthi ikhwalithi yangaphakathi yamapayipi ensimbi engenamthungo ayinasici.