Ka nui o ka paipu inoa

He aha ka nui o ka paipu inoa?

Ka nui o ka paipu inoa(NPS)he pūʻulu maʻamau o ʻAmelika ʻĀkau no nā paipu i hoʻohana ʻia no nā kaomi kiʻekiʻe a haʻahaʻa paha a me nā mahana. Hoʻokumu ʻia ka inoa NPS ma ka ʻōnaehana "Iron Pipe Size" (IPS) mua.

Ua hoʻokumu ʻia kēlā ʻōnaehana IPS e koho i ka nui o ka paipu. Ua hōʻike ka nui i ke anawaena o loko o ka paipu ma nā ʻīniha. ʻO kahi paipu IPS 6″ ka mea nona ke anawaena o loko ma kahi o 6 iniha. Hoʻomaka nā mea hoʻohana e kāhea i ka paipu e like me 2 iniha, 4 iniha, 6 iniha paipu a pēlā aku. No ka hoʻomaka ʻana, ua hana ʻia kēlā me kēia nui o ka paipu i hoʻokahi mānoanoa, i kapa ʻia ma hope he maʻamau (STD) a i ʻole ke kaumaha maʻamau (STD.WT.). Ua hoʻohālikelike ʻia ke anawaena o waho o ka paipu.

E like me nā koi ʻoihana e lawelawe ana i nā wai kaomi kiʻekiʻe, ua hana ʻia nā paipu me nā paia mānoanoa, i ʻike ʻia ʻo ka ikaika keu (XS) a i ʻole ke kaumaha (XH). Ua hoʻonui hou ʻia nā koi koi kiʻekiʻe, me nā paipu paia mānoanoa. No laila, ua hana ʻia nā paipu me nā paia ʻelua keu ikaika (XXS) a i ʻole pālua kaumaha (XXH), ʻoiai ʻaʻole i hoʻololi ʻia nā anawaena o waho. E hoʻomaopopo ma kēia pūnaewele nā ​​ʻōlelo wale nōXS&XXShoʻohana ʻia.

Paipu Papa

No laila, i ka manawa IPS ʻekolu wale nō wallticness i hoʻohana ʻia. I Malaki i ka makahiki 1927, ua noiʻi ka American Standards Association i ka ʻoihana a ua hoʻokumu i kahi ʻōnaehana e koho i ka mānoanoa o ka pā ma muli o nā ʻanuʻu liʻiliʻi ma waena o nā nui. ʻO ka inoa i kapa ʻia ʻo ka nui o ka paipu nominal i hoʻololi i ka nui o ka paipu hao, a me ka papa kuhikuhi manawa (SCH) ua hana ʻia e wehewehe i ka mānoanoa o ka paia o ka paipu. Ma ka hoʻohui ʻana i nā helu hoʻonohonoho i nā kūlana IPS, ʻike mākou i kēia lā i kahi ʻano o ka mānoanoa o ka pā, ʻo ia hoʻi:

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

Ka nui paipu inoa (NPS) he mea kuhikuhi ʻole o ka nui o ka paipu. Hōʻike ia i ka nui o ka paipu maʻamau ke hahai ʻia e ka helu koho nui kikoʻī me ka ʻole o ka hōʻailona ʻīniha. No ka laʻana, hōʻike ka NPS 6 i kahi paipu nona ka anawaena o waho he 168.3 mm.

Pili loa ka NPS i ke anawaena o loko ma nā ʻīniha, a ʻo ka NPS 12 a me ka paipu liʻiliʻi he ʻoi aku ke anawaena o waho ma mua o ka mea koho nui. No NPS 14 a ʻoi aku ka nui, ua like ka NPS me 14 iniha.

No ka NPS i hāʻawi ʻia, mau ke anawaena o waho a piʻi ka mānoanoa o ka pā me ka helu hoʻonohonoho nui. ʻO ke anawaena o loko e hilinaʻi ʻia ma ka mānoanoa o ka paia paipu i kuhikuhi ʻia e ka helu hoʻonohonoho.

Hōʻuluʻulu manaʻo:
Hōʻike ʻia ka nui o ka paipu me ʻelua mau helu dimensional,

• ka nui paipu nominal (NPS)
• helu hoʻonohonoho (SCH)

a ʻo ka pilina ma waena o kēia mau helu e hoʻoholo i ke anawaena o loko o ka paipu.

Hoʻoholo ʻia e ka ASME B36.19 ka nui o ka paipu kila kila e uhi ana i ke anawaena o waho a me ka mānoanoa o ka pā Schedule. E hoʻomanaʻo i ka mānoanoa o ka paia kuhiliʻole a hiki i ka ASME B36.19, loaʻa iā lākou kahi suffix "S". ʻO nā nui me ka ʻole o ka "S" suffix i ASME B36.10 i manaʻo ʻia no nā paipu kila kalapona.

Hoʻohana pū ka International Standards Organization (ISO) i kahi ʻōnaehana me kahi mea hoʻolālā dimensionless.
Nominal anawaena (DN) hoʻohana ʻia i ka ʻōnaehana ʻāpana metric. Hōʻike ia i ka nui o ka paipu maʻamau ke hahai ʻia e ka helu koho nui kikoʻī me ka ʻole o ka hōʻailona millimeter. No ka laʻana, ʻo DN 80 ka inoa like o NPS 3. Ma lalo o kahi papa me nā mea like no ka nui o ka paipu NPS a me DN.

Nānā: No ka NPS ≥ 4, ka DN pili = 25 i hoonuiia me ka helu NPS.

He aha ʻoe i kēia manawa "ein zweihunderter Rohr"?. ʻO German ke ʻano me kēlā paipu NPS 8 a i ʻole DN 200. Ma kēia hihia, ʻōlelo ka Dutch e pili ana i kahi "8 duimer". ʻIke loa au i ka hōʻike ʻana o ka poʻe ma nā ʻāina ʻē i kahi paipu.

Nā laʻana o OD a me ID maoli

ʻO nā anawaena waho maoli

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

ʻO nā anawaena maoli o loko o kahi paipu 1 iniha.

• 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

E like me ka mea i wehewehe ʻia ma luna, ʻaʻohe anawaena o loko e like me ka ʻoiaʻiʻo 1″ (25,4 mm).
Hoʻoholo ʻia ke anawaena o loko e ka mānoanoa o ka paia (WT).

ʻO nā ʻoiaʻiʻo pono ʻoe e ʻike!

Hōʻike 40 a me 80 e hoʻokokoke ana i ka STD a me XS a i nā manawa he nui like.
Mai ka NPS 12 a ma luna o ka mānoanoa o ka pā ma waena o ka papa kuhikuhi 40 a me STD ʻokoʻa, mai ka NPS 10 a ma luna o ka mānoanoa o ka pā ma waena o ka papa kuhikuhi 80 a me XS ʻokoʻa.

ʻO ka papahana 10, 40 a me 80 i nā manawa he nui e like me ka papahana 10S, 40S a me 80S.
Akā e makaʻala, mai NPS 12 - NPS 22 ka mānoanoa o ka pā i kekahi mau hihia. ʻO nā paipu me ka huaʻōlelo "S" aia i loko o ia ʻano ʻoi aku ka lahilahi o ka pā.

ʻAʻole uhi ka ASME B36.19 i nā nui paipu a pau. No laila, pili nā koi dimensional o ASME B36.10 i ka paipu kila kila o nā nui a me nā papa hana i uhi ʻole ʻia e ASME B36.19.