20G:GB5310Ko te maitai paerewa -95 (te momo e rite ana ki tāwāhi: ST45.8 o Tiamana, STB42 o Hapani, te Hononga o Amerika SA106B), koinei te paipa maitai poihau e whakamahia whānuitia ana, he rite tonu te hanganga matū me ngā āhuatanga miihini, ā, he rite tonu te pereti 20. He kaha te maitai i te pāmahana rūma me te pāmahana reo-tiketike, he iti te ihirangi waro, he pai ake te kirihou me te pakari, ā, he pai te mahi hanga me te whakarewa wera me te makariri. Ko te nuinga o te wā e whakamahia ana i roto i te hanga i ngā tawhā pēhanga teitei me ngā tawhā teitei ake o ngā taputapu poihau, te whakamahana wāhanga pāmahana iti, te whakamahana anō, te economizer me te pakitara wai, me ētahi atu. Pērā i te paipa pakitara diameter iti ≤500℃ te pāmahana o te paipa mata whakamahana, me te paipa pakitara wai, te ngongo economizer, te paipa pakitara diameter nui ≤450℃ te pāmahana o te paipa mamaoa, te pouaka kohikohi (economizer, pakitara wai, whakamahana pāmahana iti me te pouaka hononga whakamahana anō), ngā taputapu paipa pāmahana reo-tiketike ≤450℃. Nā te mea ka puta te whakakāwhata i roto i te mahi roa i runga ake i te 450℃, nō reira ko te pāmahana ratonga mōrahi mō te wā roa o te paipa mata whakamahana he pai ake te whakawhāiti ki raro iho i te 450℃. Ko te maitai i roto i tēnei awhe pāmahana, ka taea e tōna kaha te whakatutuki i ngā whakaritenga o te paipa whakamahana nui me te mamaoa, ā, he pai te ātete ki te waikura, te kirihou, te pakari, ngā āhuatanga whakarewa me ētahi atu āhuatanga tukatuka makariri me te wera, he tino pai, he whānui te whakamahinga. Ko ngā wāhanga o te maitai e whakamahia ana i roto i te oumu Iranian (e pā ana ki te huinga kotahi) ko te paipa whakauru wai (28 tana), te paipa whakauru wai (20 tana), te paipa hononga mamaoa (26 tana), te ipu economizer (8 tana), me te pūnaha whakaiti wai (5 tana), ā, ko te toenga ka whakamahia hei maitai papatahi me ngā rauemi derrick (tata ki te 86 tana).

Sa-210c (25MnG): Tau maitai i roto iASME SA-210paerewa. He ngongo iti te diameter o te maitai konupora waro mō ngā poiha me ngā whakamahana nui, ā, he maitai kaha wera he āhua pērara. I te tau 1995, i whakawhitia ki GB5310 ka tapaina ko 25MnG. He māmā noa iho tōna hanganga matū, engari he nui ake te waro me te konupora, ko te toenga he rite ki te 20G, nō reira he 20% teitei ake te kaha whakaputa i te 20G, ā, he rite te kirihou me te pakari ki te 20G. He māmā te tukanga whakaputa o te maitai, ā, he pai te mahi makariri me te wera. Mā te whakamahi hei utu mō te 20G, ka taea te whakaiti i te matotoru o te pakitara, te whakaiti i te nui o ngā rauemi, engari ka taea hoki te whakapai ake i te whakawhiti wera o te poiha. Ko ōna wāhanga whakamahinga me te pāmahana whakamahinga he rite tonu ki te 20G, e whakamahia ana mō te pāmahana mahi i raro i te 500℃ pakitara wai, te economizer, te whakamahana nui pāmahana iti me ētahi atu wāhanga.
Sa-106c: He tau maitai tēnei i roto iASME SA-106paerewa. He ngongo maitai waro-konupora mō ngā kohua me ngā whakamahana nui-rahi, pāmahana teitei. He māmā noa iho tōna hanganga matū, he rite ki te maitai waro 20G, engari he nui ake te ihirangi waro me te konupora, nō reira he 12% teitei ake tōna kaha whakaputa i te 20G, ā, kāore i te kino te kirihou, te pakari. He māmā noa iho te tukanga whakaputa o te maitai, ā, he pai te mahi matao me te wera. Mā te whakamahi i tēnei hei utu mō te kaikohi hanga 20G (he economizer, he pakitara whakamatao wai, he whakamahana iti-mahana me te pouaka hononga whakamahana anō), ka taea te whakaiti i te matotoru o te pakitara mā te 10% pea, ka taea ai te penapena i te utu rauemi anake, engari ka whakaitihia hoki te mahi whakarewa, me te whakapai ake i te rerekētanga ahotea ina tīmata te pouaka hononga.
15Mo3 (15MoG) : He paipa maitai tēnei i raro i te paerewa DIN17175. He ngongo maitai waro molybdenum iti te diameter mō te poiha me te whakamahana nui, ā, he maitai kaha wera momo peara. I te tau 1995, i whakawhitia ki GB5310, ā, i tapaina ko 15MoG. He māmā noa iho tōna hanganga matū, engari kei roto ko te molybdenum, nō reira he kaha ake tōna wera i te maitai waro, me te pupuri tonu i te mahi tukanga rite tonu ki te maitai waro. Nā tōna mahi pai, te utu iti, kua whakamahia whānuitia puta noa i te ao. Heoi, he āhua ki te whakakāwhata te maitai i muri i te mahi roa i te pāmahana teitei, nō reira me whakahaere tōna pāmahana whakahaere i raro i te 510℃, ā, me whakawhāiti te nui o te Al i tāpirihia ki te whakarewa hei whakahaere me te whakaroa i te tukanga whakakāwhata. Ko tēnei ngongo maitai te nuinga o te wā e whakamahia ana mō te whakamahana nui pāmahana iti me te whakamahana anō pāmahana iti. Kei raro iho i te 510℃ te pāmahana pakitara. Ko tōna hanganga matū ko C0.12-0.20, SI0.10-0.35, MN0.40-0.80, S≤0.035, P≤0.035, MO0.25-0.35; Ko te taumata kaha noa ko σs≥270-285, σb≥450-600 MPa; Ko te kirihou delta 22, neke atu rānei.