Kugwiritsidwa ntchito kwakukulu kwa mapaipi achitsulo osasunthika m'mafakitale ndi zomangamanga kumapangitsa kuti miyezo yake ndi zofunikira zamtundu zikhale zofunika kwambiri. Zomwe zimatchedwa "paipi yamitundu itatu" zimatanthawuza mapaipi achitsulo opanda msoko omwe amakwaniritsa miyezo itatu yapadziko lonse lapansi, nthawi zambiri kuphatikiza.API(American Petroleum Institute),Chithunzi cha ASTM(American Society for Testing and Equipment) ndiASME(American Society of Mechanical Engineers) miyezo. Chitoliro chachitsulo chamtunduwu chimakhala chodalirika kwambiri komanso chosinthika chifukwa cha miyezo yake yapamwamba komanso certification angapo, ndipo chimagwiritsidwa ntchito kwambiri m'mafakitale monga mafuta, gasi, mankhwala, ndi magetsi.

Choyamba, mapaipi achitsulo osasunthika a API amagwiritsidwa ntchito kwambiri pamakampani amafuta ndi gasi, ndipo miyezo yake yayikulu ndiAPI 5LndiAPI 5CT. Muyezo wa API 5L umakhudza zofunikira zopanga mapaipi otumizira kuti zitsimikizire kuti mapaipi akuyenda bwino, kutentha kwambiri komanso malo owononga. Muyezo wa API 5CT umayang'ana kwambiri posungira mafuta ndi machubu kuti zitsimikizire kulimba komanso kulimba kwa mapaipi pobowola ndi kupanga. Mapaipi achitsulo osasunthika a API nthawi zambiri amakhala ndi mphamvu zambiri, kulimba kwambiri komanso kukana kwa dzimbiri.

Kachiwiri, mapaipi azitsulo a ASTM osasunthika amaphimba minda yambiri yamafakitale, kuphatikiza ma boilers, osinthanitsa kutentha, nyumba zomangira, ndi zina zambiri.Chithunzi cha ASTM A106ndiChithunzi cha ASTM A53 ndi miyezo yoyimira. Chitoliro chachitsulo chosasunthika cha ASTM A106 ndi choyenera kwa ntchito zotentha kwambiri ndipo chimagwiritsidwa ntchito kwambiri pamakina opangira mapaipi amphamvu kwambiri m'mafakitale amagetsi, zoyenga ndi zopangira mankhwala. Chitoliro chopanda chitsulo cha ASTM A53 ndi choyenera mayendedwe amadzimadzi, kuphatikiza madzi, mpweya ndi nthunzi. Mfundo zimenezi mosamalitsa mwachindunji zikuchokera mankhwala, katundu mawotchi ndi tolerances dimensional mipope zitsulo kuonetsetsa kudalirika awo ntchito zosiyanasiyana.

Pomaliza, mapaipi achitsulo a ASME omwe amagwiritsidwa ntchito kwambiri pama boilers ndi zotengera zokakamiza. ASME B31.3 ndi ASME B31.1 ndi miyezo iwiri yofunikira yomwe imafotokoza za kapangidwe kake ndi kapangidwe kake ka mapaipi pansi pa kupanikizika kwambiri komanso kutentha kwambiri. Muyezo wa ASME umatsindika za chitetezo ndi ntchito yayitali ya mapaipi achitsulo ndipo ndi yoyenera pazochitika zomwe zimafuna kudalirika kwambiri ndi chitetezo, monga mafakitale a nyukiliya, zomera za mankhwala ndi zida zazikulu za mafakitale.

Ubwino wa mipope yamitundu itatu yagona paziphaso zawo zingapo komanso kugwiritsa ntchito kwake. Chifukwa amakumana ndi miyezo ya API, ASTM ndi ASME panthawi imodzimodzi, chitoliro chachitsulo ichi chosasunthika chimatha kukwaniritsa zofunikira za mayiko ndi madera osiyanasiyana ndipo ndi yoyenera pazochitika zosiyanasiyana zovuta. Kaya ndi kuthamanga kwambiri, kutentha kwakukulu kapena malo owononga, mapaipi atatu amatha kusonyeza ntchito yabwino kwambiri kuti atsimikizire kuti dongosololi likuyenda bwino komanso lokhazikika.

Mwachidule, monga mankhwala apamwamba pakati pa mipope yachitsulo yosasunthika, mapaipi amtundu wachitatu akhala chinthu chofunika kwambiri komanso chofunika kwambiri m'mafakitale ndi zomangamanga ndi ziphaso zawo zambiri komanso ntchito zabwino kwambiri. Kugwiritsidwa ntchito kwake kwakukulu sikumangowonjezera ubwino ndi chitetezo cha ntchito, komanso kumalimbikitsa chitukuko ndi luso laukadaulo wazinthu zachitsulo. Kusankha mapaipi amtundu wachitatu sikuti ndi chitsimikizo cha khalidwe, komanso kudzipereka ku kukhazikika kwa nthawi yaitali ndi chitetezo cha polojekitiyi.