Nā ʻano flange

E like me ka mea i wehewehe mua ʻia, ʻo nā ʻano flange i hoʻohana nui ʻia ʻo ASME B16.5: Welding Neck, Slip On, Socket Weld, Lap Joint, Threaded and Blind flange. Ma lalo ʻoe e ʻike ai i kahi wehewehe pōkole a me ka wehewehe ʻana o kēlā me kēia ʻano, i hoʻopau ʻia me kahi kiʻi kikoʻī.

ʻO nā ʻano flange maʻamau

Welding Neck flange

He maʻalahi ka ʻike ʻana i nā Flanges Welding Neck ma ka hub tapered lōʻihi, e hele mālie ana i ka mānoanoa o ka pā mai kahi paipu a i ʻole.

Hāʻawi ka hub tapered lōʻihi i mea hoʻoikaika nui no ka hoʻohana ʻana i kekahi mau noi e pili ana i ke kaomi kiʻekiʻe, sub-zero a me / a i ʻole ka wela kiʻekiʻe. ʻO ka hoʻololi maʻemaʻe mai ka mānoanoa flange i ka paipu a i ʻole ka mānoanoa pā kūpono i hana ʻia e ka taper he mea maikaʻi loa ia, ma lalo o nā kūlana o ka piʻi pinepine ʻana, ma muli o ka hoʻonui ʻana i ka laina a i ʻole nā ​​​​mea hoʻololi ʻē aʻe.

Hoʻoluu ʻia kēia mau flanges e hoʻohālikelike i ke anawaena o loko o ka paipu male a i ʻole ke kūpono ʻana no laila ʻaʻohe palena o ka holo ʻana o ka huahana. Mālama kēia i ka haunaele ma ka hui a hoʻemi i ka ʻino. Hāʻawi pū lākou i ka hāʻawi ʻana i ke koʻikoʻi maikaʻi ma o ka tapered hub a maʻalahi i radiographed no ka ʻike hewa.

E hoʻopili ʻia kēia ʻano flange i kahi paipu a i ʻole e hoʻopili ʻia me kahi komo piha hoʻokahi, V weld (Buttweld).

Slip On flange

ʻO ka ikaika i helu ʻia mai kahi flange Slip On ma lalo o ke kaomi kūloko ma ke ʻano he ʻelua hapakolu o nā flanges Welding Neck, a ʻo ko lākou ola ma lalo o ka luhi ma kahi o ka hapakolu o ka hope.

Hoʻopili ʻia ka pilina me ka paipu me 2 welds fillet, a ma waho a me loko o ka flange.

ʻO ke ana X ma ke kiʻi, ma kahi o:
ʻO ka mānoanoa o ka pā o ka paipu + 3 mm.

Pono kēia wahi, ʻaʻole e hōʻino i ka maka flange, i ka wā o ke kaʻina hana.

ʻO kahi pōʻino o ka flange, ʻo ia ke kumu mua e pono ke wili ʻia kahi paipu a laila hoʻopili wale. ʻAʻole hiki ke hui pū ʻia me ka flange a me ka kuʻekuʻe a i ʻole ka flange a me ka tee, no ka mea, ʻaʻohe hopena pololei o nā mea i kapa ʻia, e holo piha ana i ka flange Slip On.

Socket Weld flange

Ua hoʻomohala mua ʻia nā flanges Socket Weld no ka hoʻohana ʻana i ka paipu puʻe kiʻekiʻe liʻiliʻi. Ua like ko lākou ikaika kūpaʻa me nā flanges Slip On, akā ʻo ko lākou ikaika luhi he 50% ʻoi aku ma mua o nā flanges Slip On pālua.

Hana ʻia ka pilina me ka paipu me 1 weld fillet, ma waho o ka flange. Akā ma mua o ke kuʻi ʻana, pono e hana ʻia kahi ākea ma waena o ka flange a i ʻole ke kūpono a me ka paipu.

ASME B31.1 1998 127.3 Hoʻomākaukau no ka Welding (E) Socket Weld Assembly 'ōlelo ʻia:
I ka hui ʻana o ka hui ma mua o ka wili ʻana, e hoʻokomo ʻia ka paipu a i ʻole ka paipu i loko o ke kumu a hiki i ka hohonu loa a laila e hoʻihoʻi ʻia ma kahi o 1/16″ (1.6 mm) mai ka pilina ma waena o ka hopena o ka paipu a me ka poʻohiwi o ke kumu.

ʻO ke kumu o ka hoʻokuʻu ʻana i lalo i kahi Socket Weld ʻo ia ka mea maʻamau e hōʻemi i ke koena o ke koʻikoʻi ma ke kumu o ka weld i hiki ke hana i ka wā paʻa o ka metala weld. Hōʻike ke kiʻi iā ʻoe i ke ana X no ka hoʻonui ʻana.

ʻO ka pōʻino o kēia flange ʻo ia ka hakahaka, pono e hana ʻia. Ma nā huahana corrosive, a me ka nui o nā ʻōnaehana paipu kila kila, hiki i ka māwae ma waena o ka paipu a me ka flange ke hāʻawi i nā pilikia corrosion. I kekahi mau hana, ʻaʻole ʻae ʻia kēia flange. ʻAʻole wau he loea i kēia mea, akā ma ka pūnaewele, e ʻike ʻoe i nā ʻike he nui e pili ana i nā ʻano o ka corrosion.

No ka helu ʻana o kēia flange, ʻo ia kumu mua e hoʻopili ʻia kahi paipu a laila hoʻopili wale.

Lap Hui pū

Loaʻa nā ʻāpana like ʻole o Lap Joint Flange e like me nā flange ʻē aʻe i kapa ʻia ma kēia ʻaoʻao akā naʻe ʻaʻohe ona helehelena i hoʻokiʻekiʻe ʻia, ua hoʻohana pū lākou me kahi "Lap Joint Stub End".

Aneane like keia mau auhee me ka Slip On flange koe nae ka radius ma ka hui ana o ka flange alo a me ka lua e hookomo i ka flanged hapa o ka Stub End.

ʻOi aku ka liʻiliʻi o ko lākou hiki ke hoʻopaʻa paʻa, ʻoi aku ka maikaʻi ma mua o ka Slip On flanges a ʻo ke ola luhi o ka ʻaha hui he hoʻokahi hapaʻumi wale nō o nā flanges Welding Neck.

Hiki ke hoʻohana ʻia i nā pilikia a pau a loaʻa iā lākou i ka nui piha. Holo kēia mau ʻūhā ma luna o ka paipu, ʻaʻole wili ʻia a hoʻopaʻa ʻia paha i laila. Hoʻouna ʻia ke kaomi bolting i ka gasket e ke kaomi ʻana o ka flange i ke kua o ka ʻūhā paipu (Stub End).

Loaʻa i nā flanges hui pū kekahi mau pono kūikawā:

• ʻO ke kūʻokoʻa e wili a puni ka paipu e hoʻomaʻamaʻa i ka hoʻopaʻa ʻana o nā puka kīʻaha flange kū'ē.
• ʻO ka loaʻa ʻole o ka hoʻopili ʻana me ka wai i loko o ka paipu e ʻae pinepine i ka hoʻohana ʻana i nā flanges kila carbon inexpensive me ka paipu pale corrosion.
• I loko o nā ʻōnaehana e ʻā a ʻāʻī koke ʻia, hiki ke hoʻōla ʻia nā flanges no ka hoʻohana hou ʻana.

Hopena Stub

E hoʻohana mau ʻia kahi Stub End me kahi lepa Hui Lap, ma ke ʻano he lepa hope.

Hoʻohana ʻia kēia mau pili flange, i nā noi haʻahaʻa a me nā noi koʻikoʻi ʻole, a he ala haʻahaʻa ia o ka flanging.
I loko o kahi ʻōnaehana paipu kila kila, no ka laʻana, hiki ke hoʻohana ʻia kahi flange carbon steel, no ka mea ʻaʻole lākou i hui pū me ka huahana i ka paipu.

Loaʻa nā Stub Ends ma kahi kokoke i nā anawaena paipu a pau. Ua wehewehe ʻia nā ʻāpana a me nā ʻae ʻana i ka maʻamau ASME B.16.9. Hōʻike ʻia ʻo Stub Ends (pono) i ka MSS SP43.

ʻO ka lepa i ulana ʻia

Hoʻohana ʻia nā Flanges Threaded no nā kūlana kūikawā me ko lākou pono nui e hiki ke hoʻopili ʻia i ka paipu me ka ʻole o ka wili. I kekahi manawa hoʻohana pū ʻia kahi weld sila me ka pilina pili.

ʻOiai e loaʻa mau ana i ka nui o nā nui a me nā helu kaomi, hoʻohana ʻia nā mea hoʻopili i kēia lā ma kahi o nā nui paipu liʻiliʻi.

ʻAʻole kūpono ka flange i hoʻopaʻa ʻia a i ʻole ke kūpono no ka ʻōnaehana paipu me ka mānoanoa pā lahilahi, no ka mea ʻaʻole hiki ke ʻoki ʻia ke kaula ma ka paipu. No laila, pono e koho ʻia ka mānoanoa pā mānoanoa… he aha ka mānoanoa?

ʻŌlelo ʻo ASME B31.3 Piping Guide:
Ma kahi i wili ʻia ai ka paipu kila a hoʻohana ʻia no ka lawelawe ʻana i ka mahu ma luna o 250 psi a i ʻole no ka lawelawe wai ma luna o 100 psi me ka wela o ka wai ma luna o 220° F, pono ka paipu e holo ʻole a loaʻa ka mānoanoa ma kahi liʻiliʻi e like me ka papa kuhikuhi 80 o ASME B36.10.

ʻAi makapō

Hana ʻia nā Blind Flanges me ka ʻole o ka lua a hoʻohana ʻia e pani i nā wēlau o ka paipu, Valves a me ka wehe ʻana o ka moku.

Mai ke ʻano o ke kaomi kūloko a me ka hoʻouka ʻana i ka bolt, nā flange makapō, ʻoi aku ka nui o nā ʻano nui, ʻo ia nā ʻano flange koʻikoʻi loa.

Eia nō naʻe, ʻo ka hapa nui o kēia mau koʻikoʻi he ʻano kulou kokoke i ke kikowaena, a no ka mea ʻaʻohe anawaena maʻamau i loko, ua kūpono kēia mau flanges no nā noi wela kiʻekiʻe.