Hoʻohana maʻamau ʻo 20 # i ka 20 # ke kila kalapona kiʻekiʻe ma ke ʻano he mea maka, ʻo ia kahi paipu kila kila ʻole kiʻekiʻe kiʻekiʻe i hoʻohana mau ʻia i nā hale kūkulu hale a me nā hale mīkini.

20 # kila i kēia mau hiʻohiʻona: maikaʻi plasticity a me ka weldability ikaika. Ma muli o kona ikaika haʻahaʻa, kūpono ia no ka hana anu a me nā hiʻohiʻona ikaika ʻole.

Hiki ke hoʻohana ʻia ʻo 20 # seamless steel pipe i nā ʻoihana aʻe:

1. No nā paipu paila haʻahaʻa haʻahaʻa a me waena, ʻo ke kūlana hoʻokōGB 3087, hoʻohana 'ia no ka hana 'ana i nā paipu superheater a me nā paipu paia ho'olu'u wai o nā paila ha'aha'a a me nā paila ha'aha'a (ke kaomi hana ≤5.9 MPa), aia i loko o ka wela ki'eki'e (≤480 ℃) + wai ho'ohuehu wai no ka manawa lō'ihi.

2. Petroleum fracturing paipu, ka hoʻokō maʻamauGB 9948, hoʻohana ʻia no nā reactors, nā mea hoʻololi wela, a me nā mea ʻē aʻe o nā ʻāpana hoʻomaʻemaʻe ʻaila, e hoʻopili ana i ka media acidic (H₂S, CO₂) a me ke kaomi kiʻekiʻe (a hiki i 15 MPa)

3. High-press fertilizer lako, ka hoʻokō maʻamauGB 6479, hoʻohana ʻia no nā mea hoʻomomona kiʻekiʻe (10~32 MPa) e like me ka ammonia synthetic a me ka urea, e hoʻopili ana i nā media corrosive nui (e like me ka ammonia wai, urea melt)

Hot-rolled seamless kila paipu no hydraulic kākoʻo, ka hoʻokō maʻamauGB/T17396, hoʻohana ʻia no nā kolamu kākoʻo hydraulic a me nā jacks i loko o nā mines lanahu, a kū i nā haʻahaʻa ʻokoʻa kiʻekiʻe (50~100 MPa) a me ka haʻalulu hopena.