Chidule

Valavu yoyandama imagwiritsidwa ntchito makamaka pakugwiritsa ntchito mphamvu yapakati kapena yotsika (yochepera 900LB), ndipo nthawi zambiri imakhala ndi thupi la magawo awiri kapena atatu. Ngakhale kapangidwe ka mndandandawu ndi kosavuta koma magwiridwe antchito otseka ndi odalirika.

• Mpira Woyandama

• Thupi Logawanika, Thupi la Zidutswa Ziwiri kapena Zidutswa Zitatu

• Kutsiriza Kulowa

• Chitetezo pa Moto ku API 607

• Kapangidwe Kosasinthasintha

• Choletsa kuphulika

• Mphamvu yochepa

• Tsekani chipangizo

a) Kapangidwe ndi Kupanga: API 6D, BS 5351, ASME B16.34, API 608

b) Maso ndi Maso: API 6D, API B16.10, EN 558, DIN 3202

c) Kulumikiza Komaliza: ASME B16.5, ASME B16.25, EN 1092, GOST 12820

d) Kuyesa ndi Kuyang'anira: API 6D, EN 12266, API 598

Bltsinde losawoneka bwino

Pofuna kupewa kuti tsinde lisawuluke zomwe zimapangitsa kuti kupanikizika kwamkati kwa valavu kukwere modabwitsa, phewa limakhazikika pansi pa tsinde. Kuphatikiza apo, kuti tipewe kutuluka kwa madzi chifukwa cha kutentha kwa tsinde pamene likuyaka moto, chogwirira chimayikidwa pamalo olumikizirana ndi phewa pansi pa tsinde ndi thupi la valavu. Motero, mpando wotsekereza wopingasa umapangidwa womwe umateteza kutuluka kwa madzi ndikupewa ngozi.

Kapangidwe koteteza moto

Ngati moto wayamba kugwiritsidwa ntchito pogwiritsa ntchito valavu, mphete ya mpando yopangidwa ndi zinthu zopanda chitsulo idzawonongeka kutentha kwambiri. Mpando ndi mphete ya O zikayaka, chosungira mpando ndi thupi lake zidzatsekedwa ndi graphite yoteteza moto.

Chipangizo choletsa kusinthasintha

Valavu ya mpira ili ndi kapangidwe kotsutsana ndi static ndipo imagwiritsa ntchito chipangizo chotulutsira magetsi osasunthika kuti ipange mwachindunji njira yosasunthika pakati pa mpira ndi thupi kapena kupanga njira yosasunthika pakati pa mpira ndi thupi kudzera mu tsinde, kuti itulutse magetsi osasunthika omwe amapangidwa chifukwa cha kukangana panthawi yotsegula ndi kutseka mpira ndi mpando kudzera mu payipi, kupewa moto kapena kuphulika komwe kungayambitsidwe ndi static spark ndikuwonetsetsa kuti dongosololi ndi lotetezeka.

NSEN ikutsatira mosamalitsa ntchito zokonza zaulere, kusintha kwaulere ndi kubwezeretsa kwaulere mkati mwa miyezi 18 valavu itatha ntchito zakale kapena miyezi 12 itatha kuyikidwa ndikugwiritsidwa ntchito pa payipi pambuyo pa ntchito zakale (ndipo imayamba poyamba). 

Ngati valavu yalephera chifukwa cha vuto la khalidwe panthawi yogwiritsa ntchito mapaipi mkati mwa nthawi ya chitsimikizo cha khalidwe, NSEN ipereka chitsimikizo cha khalidwe chaulere. Ntchitoyi siidzatha mpaka kulephera kukhazikika ndipo valavuyo ikugwira ntchito bwino komanso kasitomala atasaina kalata yotsimikizira.

Pambuyo pa nthawi yomwe yatchulidwa, NSEN imatsimikizira kuti idzapatsa ogwiritsa ntchito ntchito zaukadaulo zabwino pa nthawi yake nthawi iliyonse yomwe chinthucho chikufunika kukonzedwa ndi kusamalidwa.