Ana paipu kila

Paipu kilaua hoʻokaʻawale ʻia e ke ʻano keʻa i loko o nā paipu pōʻai, square, rectangular, a me nā paipu kūikawā; ma nā mea i loko o nā paipu kila kila, nā paipu kila haʻahaʻa haʻahaʻa, nā paipu kila kila, a me nā paipu hui; a ma ke noi ʻana i loko o nā paipu no ka lawe ʻana i nā paipu, nā hale ʻenekinia, nā mea wela, nā ʻoihana petrochemical, nā mīkini hana, ka ʻeli ʻāina, a me nā mea hana kiʻekiʻe. Ma ke kaʻina hana, ua māhele ʻia lākou i nā paipu kila ʻole a me nā paipu kila welded. Hoʻokaʻawale ʻia nā paipu kila ʻole i loko o nā ʻano ʻano ʻōwili wela a ʻōwili anu (unuhi), ʻoiai ua māhele ʻia nā paipu kila i wili ʻia i nā paipu wili wili pololei a me nā paipu wiliwili wiliwili.

 

Nui nā ala no ka hōʻike ʻana i nā ʻāpana dimensional pipe. Aia ma lalo iho nā wehewehe no nā ana paipu maʻamau: NPS, DN, OD a me Schedule.

(1) NPS (Ka nui o ka paipu inoa)

ʻO NPS ke kūlana maʻamau o ʻAmelika ʻĀkau no nā paipu kiʻekiʻe / haʻahaʻa a me ke kiʻekiʻe / haʻahaʻa. He helu helu ʻole i hoʻohana ʻia e hōʻike i ka nui o ka paipu. Hōʻike ka helu ma hope o NPS i ka nui o ka paipu maʻamau.

Hoʻokumu ʻia ka NPS ma ka ʻōnaehana IPS (Iron Pipe Size) mua. Ua hoʻokumu ʻia ka ʻōnaehana IPS e hoʻokaʻawale i ka nui o ka paipu, me nā ana i hōʻike ʻia i nā iniha e hōʻike ana i ke anawaena o loko. No ka laʻana, hōʻike ka paipu IPS 6" i ke anawaena o loko kokoke i 6 ʻīniha. Ua hoʻomaka nā mea hoʻohana e kuhikuhi i nā paipu e like me nā paipu 2-inihi, 4-inihi, a i ʻole 6-iniha.

 

(2) Anawaena Nominal DN (Nominal Anawaena)

Nominal Diameter DN: He hōʻike ʻokoʻa no ke anawaena nominal (bore). Hoʻohana ʻia i loko o nā ʻōnaehana paipu ma ke ʻano he helu leka-helu hui pū ʻia, ʻo ia hoʻi nā leka DN i ukali ʻia e ka integer dimensionless. Pono e hoʻomaopopo ʻia ʻo ka DN nominal bore he integer pōʻai kūpono no nā kumu kuhikuhi, e lawe wale ana i kahi pilina pili i nā ana hana maoli. ʻO ka helu ma hope o DN e ana maʻamau i nā millimeters (mm). Ma nā kūlana Kina, ʻike pinepine ʻia nā anawaena paipu e like me DNXX, e like me DN50.

Hoʻopili nā anawaena paipu i ke anawaena o waho (OD), anawaena o loko (ID), a me ke anawaena inoa (DN/NPS). ʻAʻole kūpono ke anawaena nominal (DN/NPS) i ke anawaena maoli o waho a i loko paha o ka paipu. I ka hana ʻana a me ka hoʻokomo ʻana, pono e hoʻoholo ʻia ke anawaena o waho a me ka mānoanoa o ka paia e like me nā kikoʻī maʻamau e helu ai i ke anawaena o loko o ka paipu.

 

(3) Anawaena waho (OD)

Outer Diameter (OD): ʻO ka hōʻailona no ka anawaena o waho ʻo Φ, a hiki ke kuhikuhi ʻia ʻo OD. Ma ke ao holoʻokoʻa, hoʻokaʻawale pinepine ʻia nā paipu kila i hoʻohana ʻia no ka lawe ʻana i ka wai i ʻelua pūʻulu anawaena o waho: Series A (nā anawaena o waho nui, imperial) a me Series B (nā anawaena liʻiliʻi o waho, metric).

Nui ka nui o nā paipu kila ma waho o ke anawaena, e like me ISO (International Organization for Standardization), JIS (Iapana), DIN (Kelemānia), a me BS (UK).

 

(4) Papa Paipu Mānoanoa

I Malaki i ka makahiki 1927, ua alakaʻi ke Kōmike Kūlana ʻAmelika i kahi noiʻi ʻenehana a hoʻokomo i nā hoʻonui liʻiliʻi ma waena o ʻelua mau māka mānoanoa o ka pā paipu. Hoʻohana kēia ʻōnaehana i ka SCH e hōʻike i ka mānoanoa inoa o nā paipu.

 

 EHONG STEEL--nui paipu kila