I roto i te tohatoha mākete, he maha ngā wā ka tūtaki tātou ki ngā paipa maha-paerewa pērā i ngā "paipa paerewa-toru" me ngā "paipa paerewa-rima".
Heoi, he tokomaha ngā hoa kāore i te mōhio ki te āhua o ngā paipa maha-paerewa, ā, kāore hoki i te mārama ki a rātou. Ko tāku tumanako ka taea e tēnei tuhinga te whakahihiko i a koe kia kore ai koe e ruarua i te hoko me te whakamahinga i muri mai.
01—Te whanaketanga o ngā paipa maha-paerewa pērā i ngā "paipa paerewa-toru" me ngā "paipa paerewa-rima" me ngā take me te hiranga o tō rātou oranga
I ngā rā o mua, i tautokona, i hiahiatia rānei ngā paipa paerewa-maha e te rōpū kaupapa, kia taea ai e te rōpū kaupapa te hoko me te whakamahi i aua paipa i runga i te huarahi kotahi, kia penapena ai i te wā me te raruraru.
I te tīmatanga, ko ngā paipa paerewa maha te nuinga i te taha o ngā paerewa o Amerika me ngā paerewa o Amerika, ā, ko te huarahi matua ko te kaweake, ko te nuinga ko ngā "paipa paerewa-toru" me ngā "paipa paerewa-rima". I muri mai, nā te mea he maha ngā hoahoa o ngā kaupapa matū hinu ā-rohe i whakatinanahia i runga anō i ngā paerewa o Amerika, ka āta whakaurua ngā paipa paerewa maha ki roto i te hoko me te whakamahi i ngā kaupapa matū hinu me te matū ā-rohe.
I te haere o te wā, me te whanaketanga pai o te mākete, kua ngaio ake, kua kanorau ake hoki te whakarōpūtanga o ngā paipa paerewa-maha i runga i te mākete.
I tēnei wā, haunga ngā "paipa paerewa-toru" me ngā "paipa paerewa-rima", kei te mākete anō hoki ngā "paipa paerewa-rua" me ngā "paipa paerewa-whā". Heoi anō, kāore i te herea noa ki te noho tahi o ngā paerewa o Amerika me ngā paerewa o Amerika, engari i waenganui anō hoki i ngā paerewa ā-motu me ngā paerewa ā-motu, me waenganui i ngā paerewa ā-motu me ngā paerewa o Amerika.
Kāore ngā kaiwhakamahi kaupapa e whakahaere ana i ngā paipa maha-paerewa i te mākete, engari kua tīmatahia e ngā kaiwhakarato (ngā wheketere, ngā kaihokohoko mākete).
Ko te take e wātea ai ngā paipa paerewa maha:
Tuatahi, ko te mea nui, ka taea te whakatutuki. Ko ngā paipa paerewa-maha, e ai ki te ingoa: ka tutuki i te paipa rino kotahi ngā paerewa whakatinanatanga me ngā rauemi e rua. Ka taea te whakatutuki i ngā mea e rua i konei, i reira hoki, ā, ka taea te whakatutuki i ngā whakaritenga matū, ngā āhuatanga miihini, me te hangarau tukatuka o ētahi paerewa i te wā kotahi.
I te tīmatanga: ko ngā paipa maha-paerewa te mea nui e tautokona ana e te rōpū kaupapa mō te whai huatanga o te hokohoko pokapū, te penapena wā, te kaha me te raruraru;
I te huri haere o te mākete mai i te mākete a te kaihoko ki te mākete a te kaihoko, ka tukuna ngā painga o te "penapena wā, kaha me te raruraru" ki ngā kaiwhakarato mākete, me ngā painga ōhanga nui ake. Hei tauira: ki te whakamahia te nui o te moni hei whakaputa/whakapūtā i tētahi rauemi paerewa, inaianei ka taea e ia te whakaputa/whakapūtā i te rua, te toru, te whā... He tino oti ake ngā hua whakapūtā, ā, ka taea te whakarato ratonga wā tika mō ngā hiahia kua tohua, kua motuhake, kua kanorau hoki o ngā kaihoko.
02—Te kanorau me te motuhaketanga o te whakarōpūtanga o ngā ngongo maha-paerewa e kitea whānuitia ana i te mākete
E rua ngā momo whakautu ki te whakarōpūtanga o ngā ngongo maha-paerewa:
1. E ai ki ngā paerewa e pā ana: I tēnei wā, kei reira ngā ngongo paerewa maha i waenga i ngā paerewa o Amerika, ngā ngongo paerewa maha i waenga i ngā paerewa o te motu, me ngā ngongo paerewa maha i waenga i ngā paerewa o Amerika me ngā paerewa o te motu. E matapaetia ana ka puta mai ngā ngongo paerewa maha i waenga i ngā paerewa o te motu, ngā paerewa o Amerika, me ngā paerewa o Ūropi ā muri ake nei;
2. E ai ki te maha o ngā paerewa kei roto: He ngongo paerewa-rua, he ngongo paerewa-toru, he ngongo paerewa-whā, he ngongo paerewa-rima me ētahi atu momo;
Ngā māngai matua: Ngā ngongo paerewa-rua:ASTM A106 B, ASTM A53B; ASME SA106 B, ASTM A53B; ASME SA333 Gr.6, ASTM A333 Gr.6ASME SA106 B (C), ASTM A106B (C),GB/T 6479Q345E, Q355E, GB/T 18984 16MnDG;API 5L B(ngā tohu maitai e rite ana i roto i te paerewa), GB/T 9711 L245 (ngā tohu maitai e rite ana i roto i te paerewa) [ko ēnei paerewa e rua ngā putanga whakamāoritanga tino ōrite o te paerewa o Amerika me te paerewa o te motu]
Ngā paipa paerewa e toru:ASTM A106 B, ASTM A53 B,API 5L PSL1 BASME SA106 B, ASME SA53 B, ASTM A106B;
Ko ngā paipa paerewa-whā me ngā paipa paerewa-rima e kitea nuitia ana i roto i ngā paipa paerewa-Amerika me ngā paipa kawe wai: Ngā māngai noa:ASTM A106B, ASMESA106 B, ASTM A53Gr.B, API 5L PSL1 B, ASTM A333 Gr.6,API 5L X42me ētahi atu paerewa me ngā rauemi.
Wā tuku: Maehe-13-2025
