Ubungakanani bombhobho oqhelekileyo

Yintoni ubungakanani bombhobho oqhelekileyo?

Ubungakanani bombhobho oqhelekileyo(NPS)yiseti yaseMntla Melika yobungakanani obuqhelekileyo bemibhobho esetyenziselwa uxinzelelo oluphezulu okanye oluphantsi kunye namaqondo obushushu. Igama elithi NPS lisekelwe kwinkqubo yangaphambili “yoBubungakanani boMbhobho weIron” (IPS).

Loo nkqubo ye-IPS yasekwa ukumisela ubungakanani bombhobho. Ubungakanani bumele ubungakanani obuphakathi bombhobho ngee-intshi. Umbhobho we-IPS 6 ″ ngulowo ongaphakathi ngaphakathi kwawo malunga nee-intshi ezi-6. Abasebenzisi baqala ukubiza umbhobho njenge-2inch, 4inch, 6inch pipe njalo njalo. Ukuqala, ubukhulu bombhobho ngamnye buveliswe ukuba bube nobukhulu obunye, okwathi kamva kwabizwa ngokuba ngumgangatho (STD) okanye ubunzima obuqhelekileyo (STD.WT.). I-diameter yangaphandle yombhobho yayisemgangathweni.

Njengeemfuno zemizi-mveliso eziphatha ulwelo oluphezulu loxinzelelo, imibhobho yenziwa ngeendonga ezityebileyo, eziye zaziwa njengezomelele ngakumbi (XS) okanye ezinzima ngakumbi (XH). Iimfuno zoxinzelelo eziphezulu zonyuka ngakumbi, kunye nemibhobho eludongeni engqindilili. Ngokufanelekileyo, imibhobho yenziwe ngeendonga eziphindwe kabini ezinamandla (XXS) okanye iindonga eziphindwe kabini ezinzima (XXH), ngelixa i-diameter yangaphandle esemgangathweni ingatshintshwanga. Qaphela ukuba kule webhusayithi kuphela imigaqoXS&XXSzisetyenziswa.

Ishedyuli yombhobho

Ke, ngexesha le-IPS zintathu kuphela izibonda zodonga ezazisetyenziswa. NgoMatshi ka-1927, i-American Standards Association yahlola ishishini kwaye yenza inkqubo echonge ukutyeba kweendonga ngokusekelwe kumanyathelo amancinci phakathi kobukhulu. Uchongo olwaziwa njengobungakanani bombhobho oqhelekileyo endaweni yobungakanani bombhobho wentsimbi, kunye neshedyuli yegama (SCH) yayilwa ukucacisa ubungakanani bodonga lombhobho. Ngokongeza amanani eshedyuli kwimigangatho ye-IPS, namhlanje siyazi uluhlu lweendonga ezinobunzima, ezizezi:

SCH 5, 5S, 10, 10S, 20, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160, STD, XS kunye neXXS.

Ubungakanani bombhobho oqhelekileyo (NPS) ngumyili ongenamlinganiselo wobungakanani bombhobho. Ibonisa ubungakanani bombhobho oqhelekileyo xa ilandelwa yinombolo yokutyunjwa kwesayizi ethile ngaphandle kwesimboli ye-intshi. Ngokomzekelo, i-NPS 6 ibonisa umbhobho ongaphandle kwe-168.3 mm.

I-NPS inxulumene ngokukhululekileyo kwidayamitha yangaphakathi ngee-intshi, kwaye i-NPS 12 kunye nombhobho omncinci unedayamitha yangaphandle enkulu kunomyili wesayizi. Kwi-NPS 14 nangaphezulu, i-NPS ilingana ne-14inch.

Kwi-NPS enikiweyo, i-diameter yangaphandle ihlala ingaguquki kwaye ubukhulu bodonga bunyuka ngenani elikhulu leshedyuli. Idayamitha yangaphakathi iya kuxhomekeka kubunzima bodonga lombhobho oluchazwe yinombolo yeshedyuli.

Isishwankathelo:
Ubungakanani bombhobho bucaciswe ngamanani amabini angena-dimensional,

• ubungakanani bombhobho oqhelekileyo (NPS)
• inombolo yeshedyuli (SCH)

kwaye ubudlelwane phakathi kwala manani bumisela i-diameter yangaphakathi yombhobho.

Imilinganiselo yombhobho wentsimbi engatyiwayo igqitywe yi-ASME B36.19 egquma idayamitha yangaphandle kunye nobukhulu bodonga lweShedyuli. Qaphela ukuba ubukhulu bodonga olungenasici ukuya kwi-ASME B36.19 zonke zinesimamva esithi "S". Ubungakanani ngaphandle kwesimamva "S" kwi-ASME B36.10 ejoliswe kwimibhobho yentsimbi yekhabhoni.

I-International Standards Organisation (ISO) ikwasebenzisa inkqubo enomyili ongenamlinganiselo.
Ububanzi begama (DN) isetyenziswa kwinkqubo yeyunithi yemetriki. Ibonisa ubungakanani bombhobho oqhelekileyo xa ilandelwa yinombolo yokutyunjwa kobukhulu obuthile ngaphandle kwesimboli semilimitha. Umzekelo, i-DN 80 luphawu olulinganayo lwe-NPS 3. Ngezantsi kwetafile enemilinganiselo ye-NPS kunye ne-DN yeesayizi zemibhobho.

Qaphela: Kwi-NPS ≥ 4, i-DN ehambelanayo = 25 iphindwe ngenombolo ye-NPS.

Ngaba ngoku yintoni "ein zweihunderter Rohr"?. AmaJamani athetha ngaloo nto ipayipi ye-NPS 8 okanye i-DN 200. Kule meko, amaDatshi athetha nge "8 duimer". Ndinomdla wokwazi ukuba abantu bakwamanye amazwe bawubonisa njani umbhobho.

Imizekelo ye-OD yangempela kunye ne-ID

Iidayamitha zangaphandle eziyinyani

• NPS 1 eyona OD = 1.5/16″ (33.4 mm)
• NPS 2 eyona OD = 2.3/8″ (60.3 mm)
• NPS 3 eyona OD = 3½” (88.9 mm)
• NPS 4 eyona OD = 4½” (114.3 mm)
• NPS 12 eyona OD = 12¾” (323.9 mm)
• NPS 14 eyona OD = 14″(355.6 mm)

Okwenene ngaphakathi kweedayamitha zombhobho we-intshi eyi-1.

• I-NPS 1-SCH 40 = OD33,4 mm - WT. 3,38 mm - ID 26,64 mm
• I-NPS 1-SCH 80 = OD33,4 mm - WT. 4,55 mm - ID 24,30 mm
• I-NPS 1-SCH 160 = OD33,4 mm - WT. 6,35 mm - ID 20,70 mm

Njengoko kuchaziwe ngasentla, akukho dayamitha yangaphakathi ehambelana nenyaniso 1″ (25,4 mm).
Idayamitha yangaphakathi imiselwa bubunzima bodonga (WT).

Iinyani ekufuneka uzazi!

IShedyuli 40 kunye ne-80 esondela kwi-STD kunye ne-XS kwaye kwiimeko ezininzi ziyafana.
Ukusuka kwi-NPS ye-12 nangaphezulu kobunzima bodonga phakathi kweshedyuli ye-40 kunye ne-STD ziyahluka, ukusuka kwi-NPS 10 nangaphezulu kodonga oluphakathi kweshedyuli 80 kunye ne-XS ziyahluka.

IShedyuli 10, 40 kunye ne-80 kwiimeko ezininzi ziyafana neshedyuli 10S, 40S kunye ne-80S.
Kodwa qaphela, ukusuka kwi-NPS 12 - NPS 22 ubukhulu bodonga kwezinye iimeko ziyahluka. Imibhobho enesimamva "S" inoluhlu olucekethekileyo olubonakala eludongeni.

I-ASME B36.19 ayiquki bonke ubungakanani bombhobho. Ke ngoko, iimfuno zobukhulu be-ASME B36.10 zisebenza kumbhobho wensimbi engenasici wobungakanani kunye neeshedyuli ezingagqunywanga yi-ASME B36.19.