JIS G 3452chiyero cheJapan chinotsanangura mapaipi esimbi yekabhoni akasungirirwa kuti atakure utsi, mvura, mafuta, gasi, mhepo, nezvimwewo pakushanda kwakaderera. JIS G 3452 ine giredhi rimwe chete, SGP, iro rinogona kugadzirwa ne resistance welding (ERW) kana butt welding.
JIS G 3452 Mapaipi esimbi anofanira kugadzirwa achishandisa musanganiswa wakakodzera wenzira dzekugadzira mapaipi nenzira dzekupedzisa.
| Chiratidzo yegiredhi | Chiratidzo chemaitiro ekugadzira | Kupatsanurwa kwe zinc-coating | |
| Maitiro ekugadzira mapaipi | Nzira yekupedzisa | ||
| SGP | Kudzivirirwa kwemagetsi kwakabatana: E Yakasungirirwa matako: B | Yakapedzwa nekupisa: H Yakapedzwa nechando: C Sezvo simba rekudzivirira magetsi rakasungirirwa: G | Mapaipi matema: mapaipi asina kuputirwa ne zinc Mapaipi machena: mapaipi akafukidzwa ne zinc-coating |
Mapaipi anowanzoendeswa sezvaakagadzirwa. Mapaipi akapedzwa nechando anofanira kuvharwa mushure mekugadzirwa.
Kana pombi yakagadzirwa neERW, ma weld ari pamusoro pemukati nekunze kwepombi anofanira kubviswa kuti pave ne weld yakatsetseka iri pamucheto wepombi.
Kana zvikasashanda zvakanaka nekuda kwedhayamita yepombi kana michina, nezvimwewo, weld iri pamusoro pemukati haigone kubviswa.
Kugadzirira: Usati waisa galvanizing inopisa, pamusoro pepombi yesimbi panofanira kucheneswa zvakanaka nejecha, kuputira, nezvimwewo.
Ukobvu: Pakuputira zinc, ingot ye zinc yakasanganiswa Class 1 yakatsanangurwa muJIS H 2107 kana zinc ine hunhu hwakaenzana neizvi inofanira kushandiswa.
Zvimwe: Zvimwe zvinodiwa zvekushandisa pakugadzika simbi zvinoenderana neJIS H 8641.
Bvunzo: Kuyerwa kwekufanana kwejira rakabatidzwa zvichienderana neJIS H 0401 Chinyorwa 6.
Kuwedzera kune zvinhu zvakapihwa, zvimwe zvinhu zvekubatanidza zvinogona kuwedzerwa sezvinodiwa.
| Chiratidzo chegiredhi | P (Phosphorus) | S (Sarufa) |
| SGP | yepamusoro 0.040% | yepamusoro 0.040% |
JIS G 3452 haina zvirambidzo zvakawanda pakuumbwa kwemakemikari nekuti JIS G 3452 inonyanya kushandiswa pakushandiswa kwakajairika sekufambisa utsi, mvura, mafuta, uye gasi rechisikigo. Kuumbwa kwemakemikari echinhu ichi hakusi chinhu chakakosha, asi pane hunhu hwemuchina hwepombi kuti ikwanise kumira kumanikidzwa kushanda.
Zvivakwa zveKusimba
| Chiratidzo chegiredhi | Simba rekusimba | Kureba, min, % | ||||||
| Chidimbu chekuyedza | Bvunzo gwara | Ukobvu hwemadziro, mm | ||||||
| N/mm² (MPA) | ＞3 ≤ 4 | ＞4 ≤ 5 | ＞5 ≤ 6 | ＞6 ≤ 7 | ＞7 | |||
| SGP | Maminetsi mazana maviri nemakumi mapfumbamwe | Nhamba 11 | Yakafanana netambo yepombi | 30 | 30 | 30 | 30 | 30 |
| Nhamba 12 | Yakafanana netambo yepombi | 24 | 26 | 27 | 28 | 30 | ||
| Nhamba 5 | Yakamira padivi repombi | 19 | 20 | 22 | 24 | 25 | ||
Pamapaipi ane dhayamita 32A kana pasi, huremu hwekureba huri patafura iyi hahushande, kunyangwe mhedzisiro yekuyedzwa kwekureba kwayo inofanira kunyorwa. Muchiitiko ichi, zvinodiwa zvekureba zvakabvumiranwa pakati pemutengi nemugadziri zvinogona kushandiswa.
Imba Inotsvedza
Kureba: Kwemachubhu ane dhayamita yepamusoro inodarika 50A (2B).
Hapana mitswe kana chubhu yakatwasuka kusvika 2/3 yedhayamita yekunze yechubhu.
Kugona kukotama
Kureba: Kwemachubhu esimbi ane dhayamita yezita ≤ 50A (2B).
Peta sampuli kusvika pa90° ine dhayamita yemukati yakapetwa katanhatu kupfuura dhayamita yekunze yepombi pasina kutsemuka.
Pombi yega yega yesimbi inofanira kunge iine bvunzo yekumanikidzwa kwemvura kana bvunzo isingaparadze.
Kuedzwa kweHydrostatic
Kumanikidzwa: 2.5 MPa;
Nguva: Bata kwemaminitsi mashanu kana kupfuura;
Mutongo: pombi yesimbi iri pasi pekumanikidzwa isina kubuda mvura.
Muedzo Usingaparadze
Ongororo ye ultrasonic yakataurwa muJIS G 0582 ndiyo inofanira kushanda. Mwero webvunzo unogona kunge wakanyanya kuoma kupfuura Category UE.
Kuongororwa kwe eddy current kwakatsanangurwa muJIS G 0583 kuchashanda. Mwero webvunzo unogona kunge wakanyanya kuoma kupfuura Category EZ.
Pamapaipi ane dhayamita dzinonzi ≥ 350A (14B), verenga dhayamita nekuyera denderedzwa, umo kushivirira kuri ± 0.5%.
Rudzi rwepombi yeDN≤300A/12B: tambo kana kuti mativi akatsetseka.
Rudzi rwemagumo epombi yeDN≤350A/14B: magumo akatsetseka.
Kana mutengi achida mugumo wakachekwa, kona yebhero ndeye 30-35°, upamhi hwebhero hwemucheto wepombi yesimbi: hunopfuura 2.4mm.
JIS G 3452 ine zvakaenzana muASTM A53uyeGB/T 3091, uye zvinhu zvepombi zvakatsanangurwa muzviyero izvi zvinogona kutariswa zvakaenzana maererano nekushanda uye mashandisirwo.
Kubva payakatangwa muna 2014, Botop Steel yave kambani inotungamira mukutengesa mapaipi esimbi yekabhoni kuChamhembe kweChina, inozivikanwa nebasa rakanaka kwazvo, zvigadzirwa zvemhando yepamusoro, uye mhinduro dzakakwana.
Kambani iyi inopa mapaipi akasiyana-siyana esimbi yekabhoni nezvimwe zvigadzirwa zvinoenderana nazvo, zvinosanganisira mapaipi esimbi asina musono, ERW, LSAW, uye SSAW, pamwe chete nehurongwa hwakazara hwemapipi nemaflange. Zvigadzirwa zvayo zvehunyanzvi zvinosanganisirawo alloys dzemhando yepamusoro nesimbi dzisina ngura dzinogadzirwa neaustenitic, dzakagadzirirwa kusangana nezvinodiwa nemapurojekiti akasiyana-siyana emapaipi.
Taura nesu, timu yehunyanzvi yakagadzirira kukupai mabasa emhando yepamusoro uye mhinduro, ichitarisira kushanda pamwe chete nemi, uye kuvhura pamwe chete chitsauko chitsva chekubudirira.
