API 5L ahịrị ọkpọkọ maka ọkpọkọ mmanụ na gas

Enwere ike kewaa pipeline gas ụzọ atọ: pipeline na-achịkọta gas, pipeline gas, na pipeline nkesa gas dịka ojiji ha si dị.

①Gas na-anakọta pipeline: pipeline si n'isi olulu mmiri nke ikuku gas site na ebe a na-ekpokọta ọnụ na ụlọ ọrụ ọgwụgwọ gas ma ọ bụ ọdụ gas compressor na-amalite, nke a na-ejikarị na-anakọta gas na-adịghị edozi nke a na-esi na stratum. N'ihi nnukwu nrụgide nke gas nke ọma, nrụgide nke ọkpọkọ ikpokọta gas na-adịkarị karịa 100 kgf / cm2, na dayameta ọkpọkọ bụ 50 ruo 150 mm.

② pipeline gas: pipeline sitere na ụlọ ọrụ na-emepụta gas ma ọ bụ ịmalite gas compressor ọdụ gas nke gas na-ekesa gas, nnukwu ndị ọrụ ma ọ bụ nchekwa gas na isi obodo, yana pipeline na-ekwurịta okwu n'etiti isi iyi gas. Mgbe nhazichara, pipeline na-adabere na njem ụgbọ mmiri. Ọkọlọtọ ikuku gas dị mma (lee teknụzụ nnyefe gas pipeline) bụ akụkụ bụ isi nke sistemụ nnyefe gas niile. Dayameta nke ọkpọkọ gas dị ukwuu karịa nke gas na-anakọta pipeline na ọkpọkọ nkesa gas. Okpokoro gas kacha ibu nwere dayameta nke 1420 mm. A na-ebufe gas sitere n'okike n'okpuru nrụgide site na ebe mmalite mmalite na ọdụ compressor n'akụkụ ahịrị. Nrụgide ikuku gas bụ 70-80 kgf / cm2, na ngụkọta ogologo nke pipeline nwere ike iru puku kwuru puku kilomita.

③Gas nkesa pipeline: pipeline si n'obodo ukwu mgbali regulating na metering ọdụ ka onye ọrụ alaka akara nwere ala mgbali, otutu alaka, ok ọkpọkọ netwọk, na obere ọkpọkọ dayameta. Na mgbakwunye na ọnụ ọgụgụ dị ukwuu nke ọkpọkọ ígwè, a pụkwara iji ọkpọkọ plastik ma ọ bụ ihe ndị ọzọ mee ka ọkpọkọ nkesa gas dị ala. .

A na-eji X-60 obere alloy ígwè (oke ike nke 42 kgf / cm2) mee ihe maka ọkpọkọ, na ihe ndị dị elu dị ka X-65 na X-70 amalitela iji ya. Iji belata nguzogide esemokwu na pipeline, a na-ekpuchikarị ọkpọkọ ígwè ọhụrụ karịrị 426 mm na mkpuchi dị n'ime.

A na-ebufe gas nke ihe anụ ahụ dị iche iche n'usoro n'otu pipeline, yana ule ikuku gas na mmiri mmiri na-ebugharị na -70 ° C na 77 kgf/cm2 nnukwu nrụgide. Usoro njem pipeline nke ikuku gas nwere akụkụ abụọ: ọdụ ụgbọ mmiri na-ebufe gas na usoro ahịrị. Usoro ahịrị na-agụnye pipeline, ọnụ ụlọ valvụ n'akụkụ ụzọ ahụ, na-agafe ụlọ (lee pipeline crossing project and pipeline crossing project), ebe nchekwa cathodic (lee pipeline anticorrosion), usoro nkwurịta okwu pipeline, izipu na usoro nlekota akpaka (lee nlekota pipeline), wdg.

Ọkpụkpụ ígwè bụ isi ihe nke pipeline. Natural gas nnyefe ígwè anwụrụ bụ a pụrụ iche metallurgical ngwaahịa kpụrụ miri nhazi nke efere (belt). N'ihi ọdịiche dị na teknụzụ usoro, nhazi nke pipeline ígwè nwere ụfọdụ ọdịiche dị na pipeline ígwè nke ndị na-emepụta ihe dị iche iche na-emepụta. Site na mmepe nke nyocha nchara nchara na-aga n'ihu, Canada na mba ndị ọzọ etinyela akụkụ nnwale nke X100 na X120 pipeline steel. N'ime ọrụ pipeline Jining tie-line na China, a na-eji ígwè pipeline ọkwa X80 mee ihe maka ngalaba nnwale 7.71km maka oge mbụ. Ogologo 4,843km nke West-East Gas Pipeline nke ahịrị ahịrị nke abụọ na-eji X80 steel ọkwa ọkpọkọ nwere dayameta nke 1219mm, nke na-abawanye nrụgide nnyefe gas na 12Mpa. N'ikwu okwu n'ozuzu, ígwè X80 bụ usoro okpukpu abụọ nke ferrite na bainite, X100 pipe steel bụ usoro bainite, na X120 ọkpọkọ ígwè bụ ultra-low carbon bainite na martensite.

Maka pipeline gas sitere n'okike, ike, ike na weldability bụ ihe atọ kachasị mma na-egosi njikwa mma [6].