Nā ana o ka paipu kila

Nā paipu kilaua hoʻokaʻawale ʻia e ke ʻano ʻāpana keʻa i nā paipu poepoe, huinahā, huinahā, a me ke ʻano kūikawā; ma ka mea i loko o nā paipu kila kūkulu kalapona, nā paipu kila kūkulu haʻahaʻa-alloy, nā paipu kila alloy, a me nā paipu hui; a ma ka hoʻohana ʻana i loko o nā paipu no ka lawe ʻana i nā paipu, nā ʻōnaehana ʻenekinia, nā lako wela, nā ʻoihana petrochemical, ka hana mīkini, ka ʻeli honua, a me nā lako kaomi kiʻekiʻe. Ma ke kaʻina hana, ua māhele ʻia lākou i nā paipu kila seamless a me nā paipu kila welded. Hoʻokaʻawale hou ʻia nā paipu kila seamless i nā ʻano ʻōwili wela a me nā ʻōwili anu (huki ʻia), ʻoiai ua māhele ʻia nā paipu kila welded i nā paipu welded humuhumu pololei a me nā paipu wili humuhumu.

 

Aia kekahi mau ʻano hana no ka hōʻike ʻana i nā palena ana o ka paipu. Aia ma lalo nā wehewehe no nā ana o ka paipu i hoʻohana pinepine ʻia: NPS, DN, OD a me Schedule.

(1) NPS (Nui Paipu Nominal)

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

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

 

(2) Anawaena Nominal DN (Anawaena Nominal)

ʻO ke Anawaena Nominal DN: He ʻano ʻē aʻe no ke anawaena nominal (bore). Hoʻohana ʻia i nā ʻōnaehana paipu ma ke ʻano he mea hōʻike hui leka-helu, nona nā leka DN i ukali ʻia e kahi helu helu ʻole. Pono e hoʻomaopopo ʻia ʻo ka DN nominal bore he helu helu poepoe kūpono no nā kumu kuhikuhi, e lawe ana i kahi pilina wehe wale i nā ana hana maoli. ʻO ka helu ma hope o DN ua ana ʻia maʻamau i millimeters (mm). Ma nā kūlana Kina, ua hōʻike pinepine ʻia nā anawaena paipu ʻo DNXX, e like me DN50.

Hoʻopili nā anawaena paipu i ke anawaena waho (OD), ke anawaena o loko (ID), a me ke anawaena inoa (DN/NPS). ʻAʻole kūlike ke anawaena inoa (DN/NPS) me ke anawaena waho a o loko paha o ka paipu. I ka wā o ka hana ʻana a me ke kau ʻana, pono e hoʻoholo ʻia ke anawaena 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)

Anawaena Waho (OD): ʻO ka hōʻailona no ke anawaena waho ʻo Φ, a hiki ke hōʻike ʻia he OD. Ma ke ao holoʻokoʻa, ua hoʻokaʻawale pinepine ʻia nā paipu kila i hoʻohana ʻia no ka lawe ʻana i ke wai i ʻelua mau moʻo anawaena waho: Series A (nā anawaena waho nui aʻe, imperial) a me Series B (nā anawaena waho liʻiliʻi, metric).

Aia kekahi mau ʻano paipu kila me ke anawaena waho ma ka honua holoʻokoʻa, e like me ISO (International Organization for Standardization), JIS (Iapana), DIN (Kelemānia), a me BS (UK).

 

(4) Papa Kuhikuhi Mānoanoa o ka Paia Paipu

I Malaki 1927, ua hana ke Komite Kūlana ʻAmelika i kahi noiʻi ʻoihana a ua hoʻolauna i nā piʻi liʻiliʻi ma waena o ʻelua mau papa mānoanoa o ka paia paipu mua. Hoʻohana kēia ʻōnaehana iā SCH e hōʻike i ka mānoanoa maʻamau o nā paipu.

 

 ʻEHONG STEEL--nā ana o ka paipu kila