Kukula Kwapaipi Kwadzina

Kodi Nominal Pipe Size ndi chiyani?

Kukula Kwapaipi Kwadzina(NPS)ndi North America ya muyezo miyeso mipope ntchito pa kupsyinjika mkulu kapena otsika ndi kutentha. Dzina lakuti NPS limachokera ku "Iron Pipe Size" (IPS) kale.

Dongosolo la IPS lidakhazikitsidwa kuti liwonetse kukula kwa chitoliro. Kukula kwake kunkayimira kukula kwa chitolirocho mu mainchesi. Chitoliro cha IPS 6 ″ ndi chomwe mkati mwake muli pafupifupi mainchesi 6. Ogwiritsa ntchito adayamba kuyitcha chitoliro ngati chitoliro cha 2inch, 4inch, 6inch ndi zina zotero. Poyamba, kukula kwa chitoliro chilichonse kunapangidwa kukhala ndi makulidwe amodzi, omwe pambuyo pake adatchedwa kuti muyezo (STD) kapena kulemera kwake (STD.WT.). Kunja kwa chitolirocho kunali kofanana.

Monga zofunikira zamafakitale zogwiritsira ntchito madzi othamanga kwambiri, mapaipi adapangidwa ndi makoma okhuthala, omwe amadziwika kuti amphamvu kwambiri (XS) kapena olemetsa kwambiri (XH). Kuthamanga kwapamwamba kumawonjezeka kwambiri, ndi mipope yokulirapo ya khoma. Chifukwa chake, mapaipi adapangidwa ndi makoma amphamvu kwambiri (XXS) kapena makoma owonjezera owonjezera (XXH), pomwe ma diameter akunja osasinthika. Dziwani kuti patsamba lino ndi mawu okhaXS&XXSamagwiritsidwa ntchito.

Pulogalamu ya Pipe

Chifukwa chake, panthawi ya IPS zida zitatu zokha zidagwiritsidwa ntchito. Mu Marichi 1927, bungwe la American Standards Association linafufuza zamakampani ndikupanga dongosolo lomwe limasankha makulidwe a khoma potengera masitepe ang'onoang'ono pakati pa kukula kwake. Dzina lomwe limadziwika kuti kukula kwa chitoliro mwadzina m'malo mwa kukula kwa chitoliro chachitsulo, ndi mawu akuti ndandanda (SCH) adapangidwa kuti afotokoze makulidwe a khoma la chitoliro. Powonjezera manambala a ndandanda ku miyezo ya IPS, lero tikudziwa makulidwe angapo a khoma, omwe ndi:

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

Kukula kwapaipi mwadzina (NPS) ndi chojambula chopanda malire cha kukula kwa chitoliro. Imawonetsa kukula kwa chitoliro chokhazikika ikatsatiridwa ndi nambala yeniyeni ya kukula popanda chizindikiro cha inchi. Mwachitsanzo, NPS 6 imasonyeza chitoliro chomwe m'mimba mwake ndi 168.3 mm.

NPS ndi yogwirizana kwambiri ndi mainchesi amkati mwa mainchesi, ndipo NPS 12 ndi chitoliro chaching'ono chimakhala ndi mainchesi akunja akulu kuposa wopanga kukula. Kwa NPS 14 ndi kukulirapo, NPS ndi yofanana ndi 14inch.

Kwa NPS yopatsidwa, m'mimba mwake yakunja imakhala yosasunthika ndipo makulidwe a khoma amawonjezeka ndi nambala yokulirapo. Kuzama kwa mkati kudzadalira makulidwe a khoma la chitoliro lotchulidwa ndi nambala ya ndondomeko.

Chidule:
Kukula kwa chitoliro kumatchulidwa ndi manambala awiri osawoneka bwino,

• kukula kwapaipi (NPS)
• ndandanda nambala (SCH)

ndipo ubale wapakati pa manambalawa umatsimikizira kukula kwa chitoliro chamkati.

Miyeso ya Pipe yachitsulo chosapanga dzimbiri imatsimikiziridwa ndi ASME B36.19 yophimba kunja kwake ndi makulidwe a khoma la Ndandanda. Dziwani kuti makulidwe a khoma osapanga dzimbiri kupita ku ASME B36.19 onse ali ndi mawu omangika "S". Kukula kopanda "S" suffix ndi ASME B36.10 yomwe imapangidwira mapaipi achitsulo cha carbon.

International Standards Organisation (ISO) imagwiritsanso ntchito makina omwe ali ndi mawonekedwe opanda mawonekedwe.
Diameter nominal (DN) imagwiritsidwa ntchito mu metric unit system. Imawonetsa kukula kwa chitoliro chokhazikika ikatsatiridwa ndi nambala yeniyeni ya kukula popanda chizindikiro cha millimeter. Mwachitsanzo, DN 80 ndi dzina lofanana ndi NPS 3. Pansi pa tebulo lomwe lili ndi zofanana ndi kukula kwa mapaipi a NPS ndi DN.

Zindikirani: Kwa NPS ≥ 4, DN yofananira = 25 yochulukitsa ndi nambala ya NPS.

Kodi inu tsopano "ein zweihunderter Rohr" ndi chiyani? Ajeremani amatanthauza ndi chitoliro cha NPS 8 kapena DN 200. Pankhaniyi, Dutch akukamba za "8 duimer". Ndine wofunitsitsa kudziwa momwe anthu akumayiko ena amasonyezera chitoliro.

Zitsanzo za OD zenizeni ndi ID

Ma diameter enieni akunja

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

Ma diameter enieni amkati a chitoliro cha 1 inchi.

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

Monga momwe tafotokozera pamwambapa, palibe kukula kwamkati komwe kumafanana ndi chowonadi 1″ (25,4 mm).
Kutalika kwamkati kumatsimikiziridwa ndi makulidwe a khoma (WT).

Zowona zomwe muyenera kuzidziwa!

Ndandanda 40 ndi 80 ikuyandikira STD ndi XS ndipo nthawi zambiri zimakhala zofanana.
Kuchokera ku NPS 12 ndi pamwamba pa khoma makulidwe pakati pa ndondomeko 40 ndi STD ndizosiyana, kuchokera ku NPS 10 ndi pamwamba pa khoma la khoma pakati pa ndondomeko 80 ndi XS ndizosiyana.

Ndandanda 10, 40 ndi 80 nthawi zambiri zofanana ndi ndondomeko 10S, 40S ndi 80S.
Koma samalani, kuchokera ku NPS 12 - NPS 22 makulidwe a khoma nthawi zina ndi osiyana. Mapaipi okhala ndi mawu akuti "S" amakhala ndi zowonda kwambiri pakhoma.

ASME B36.19 sichiphimba miyeso yonse ya mapaipi. Choncho, zofunikira za ASME B36.10 zimagwira ntchito ku chitoliro chachitsulo chosapanga dzimbiri cha kukula kwake ndi ndondomeko zomwe sizinaphimbidwe ndi ASME B36.19.