1. Tirohanga Whānui Paerewa

Ko te NACE MR0175/ISO 15156 te paerewa e mōhiotia ana i te ao mō te whiriwhiri i ngā rauemi whakarewa hei whakamahi i roto i ngā taiao whakaputa hinu me te hau kei roto (kawa) te H₂S. I whakaputaina ngātahitia e NACE International (ināianei ko AMPP) me te International Organization for Standardization (ISO), ko te whakahoutanga whai mana o nāianei ko ANSI/NACE MR0175-2021/ISO 15156:2020.

I ahu mai te whakatūnga o tēnei paerewa i te pana a te umanga ki ngā hanganga hohonu ake me ngā rauemi tawhiti atu i te moana. I te piki haere o te whanaketanga o ngā mara hinu me te hau kawa, kua piki haere te kino o te waikura i puta mai i te hauwai whanariki—ina koa ko te pakaru o te ahotea whanariki (SSC), ka taea te pakarukaru i roto i ngā maitai waro kaha teitei me te rino iti-koranu, ka arahi ki ngā aituā kino.

2. Hanganga Paerewa me te Whānuitanga

E toru ngā wāhanga o te paerewa, ka honoa ki tētahi kōnae PDF kotahi, ā, kei roto hoki ngā Pānui Hangarau maha i whakaputaina i te tau 2021 me te tau 2022:

Wāhanga	Whānuitanga	Ihirangi Matua
Wāhanga 1	Ngā Mātāpono Whānui	Te tautuhi i te taiao kawa, ngā mātāpono whiriwhiri rauemi taketake, ngā tikanga tohu
Wāhanga 2	Ngā maitai waro me ngā maitai iti-konumohe	Ngā rohe pakeke (≤22 HRC), ngā whakaritenga whakarewa, te whakahaere matū
Wāhanga 3	Ngā CRA me Ētahi Atu Koranu	Ngā herenga taiao mō ia whānau koranu (pāmahana, pH₂S, kukū pūhaumāota)

E pā ana te paerewa ki ngā taputapu e whakamahia ana i roto i te hanga hinu me te hau me ngā whare whakareka hau māori i ngā wāhi ka raru pea te hauora me te haumaru o te marea me ngā kaimahi, tae atu ki te taiao. Ka aro atu ki ngā tikanga pakaru katoa i puta mai i te H₂S, tae atu ki te SSC, SCC, HIC, SWC, me ētahi atu.

3. Te Whakamāramatanga o te Taiao Kawa

E ai ki te paerewa, ina neke atu te pēhanga wāhanga H₂S i roto i te āhua hau i te 0.3 kPa (0.05 psia), ka kiia te taiao he taiao kawa, me whiriwhiri rauemi kia rite ki ngā whakaritenga o te paerewa.

Ko ngā taputapu e tika ana ko ngā pane puna, ngā rākau Kirihimete, ngā pūnaha paipa, ngā wehewehe, ngā paipa rere i ngā whare whakaputa o runga, me ngā pūnaha paipa e kawe ana i ngā warowaihā kawa.

4. Ngā Whakaritenga Rauemi Matua

Ngā maitai waro me ngā maitai iti-konumohe (Wāhanga 2)

Kaua te pakari o te konganuku turanga, te konganuku whakarewa, me te HAZ e neke ake i te 22 HRC (248 HV10)

He mea whakahau te maimoatanga wera i muri i te whakarewanga (PWHT)

Me tino whakahaere te matū

Ngā Koranu Ātete-Waikura (Wāhanga 3)

Ko ngā rauemi e mōhiotia whānuitia ana ko: 316 SS, ngā koranu 6-moly, 2507 duplex SS, te koranu 825, te koranu 625, te koranu C-276, me te koranu 400. He rohe taiao motuhake tō ia mea mō te pāmahana, te pēhanga wāhanga H₂S, me te kukū pūhaumāota.

5. Ngā Whakahōutanga Matua me te Tirohanga ki te Ao Whānui

Ko te putanga 2021/2020 kei te hangai tonu ki te putanga 2003, me ngā whakatikatika ā-wāhanga mā roto i ngā Panuitanga Hangarau. I te tau 2018, i whakaae ngā komiti whakahaere me tuhi anō kia ngāwari ai te whakamahi, kia whakaurua ai hoki ngā whanaketanga o te ahumahi.

Kei te pōtihia, kei te whakaputaina hoki tētahi putanga kua oti te tuhi anō i te ISO, kua hurihia kia toru ngā wāhanga hou:

Wāhanga 1: Ngā whakaritenga rauemi me te tukatuka

Wāhanga 2: Aromatawai taiao ratonga me te whiriwhiri rauemi

Wāhanga 3: Ngā whakaritenga manatoko, tohu, me te pōti

Kei roto i te putanga hou ngā kōrero taipitopito mō ngā tikanga whakamātautau H₂S, tae atu ki ngā aratohu mō te tauira, te kōwhiringa tikanga whakamātautau, me te whānuitanga o te whakamātautau e hiahiatia ana mō te tohu hua.

6. Te Hiranga Whaihua

Ko te NACE MR0175/ISO 15156 te pūtake matua mō te whiriwhiri rauemi i roto i te whanaketanga o te mara hinu me te hau kawa. E whakanui ana te paerewa kāore he kowiri tira e tino ātete ki te pakaru waikura i puta mai i te hauota - he mea nui te mārama ki ngā herenga koranu mō te whiriwhiri rauemi i roto i ngā taiao kawa uaua. Ko ngā taputapu e tino pāngia ana e te waikura, pērā i ngā takirere, ngā hononga, me ngā taputapu, me tino tutuki ki te paerewa. Me mau tonu te whai i ngā rauemi ratonga kawa katoa, me ngā tiwhikete whakamātautau mira e whakaū ana i te whakamātautau pakeke, te tutuki matū, me te āhua maimoatanga wera.

I roto i ngā taiao hinu me te hau kawa, ko te kōwhiringa rauemi e whai ana i te paerewa NACE MR0175 / ISO 15156. Ko tēnei paerewa te "ture koura" hei whakarite i te whakahaere haumaru o ngā taputapu i roto i ngā taiao kei roto te hauwai whanariki (H₂S). Ka kapi i tēnei paerewa ngā taputapu me ngā wāhanga katoa kei roto te pēhanga, mai i ngā whakaurunga pane puna ki ngā waeine tukatuka o raro.

Ngā taputapu mō te pane puna me te raro o te poka: ngā taputapu pane puna, ngā ngongo me ngā aho anga (ngā ngongo whakaputa, anga).

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Ngā taputapu tukatuka me te whakawhiti mata: ngā oko pēhanga, ngā wehewehe – he taputapu kei roto te pēhanga e whakamahia ana mō te wehenga me te tukatuka hinu/hau.

Haunga ngā hua o runga ake nei, ka hipokina hoki e te paerewa ngā momo rauemi, tae atu ki te maitai waro, te maitai iti-koranu, te maitai kore waikura, me ngā koranu e hangai ana ki te nikara.