1. Heerkulka naqshadeynta iyo cadaadiska weelka;

2. Heerarka isku xirka ee valves, qalabyada, heerkulka, cadaadiska, iyo cabbirada heerka ku xiran;

3. Saamaynta cadaadiska kulaylka ee flange ee tuubada isku xirka ee dhuumaha geeddi-socodka (heerkulka sare, dhuumaha kulaylka);

4. Habka iyo hawlgelinta sifooyinka dhexdhexaadka ah:

Weelasha ku jira xaaladaha faakuumka, marka heerka faakuumku ka yar yahay 600mmHg, heerka cadaadiska garabka isku xidha waa inuusan ka yarayn 0.6Mpa; Marka heerka faakuumku yahay (600mmHg ~ 759mmHg), heerka cadaadiska ee flange isku xira waa inuusan ka yarayn 1.0MPa;

Weelasha ay ku jiraan warbaahinta khatarta ah ee khatarta ah iyo warbaahinta khatarta ah ee dhexdhexaadka ah, heerka cadaadiska magaca weelku waa inuusan ka yarayn 1.6MPa;

Weelasha ay ku jiraan warbaahinta khatarta ah ee aad iyo aad u sunta ah, iyo sidoo kale warbaahinta aadka loo dalooli karo, heerka cadaadiska magaca weelku waa in aanu ka hoosayn 2.0MPa.

Waa in la ogaadaa in marka dusha daboolka ee garabka isku xirka ee weelka loo doorto sida concave convex ama tenon jeexdin dusha sare, tuubooyinka isku xira ee ku yaal xagga sare iyo dhinaca weelka waa in loo doortaa sida flanges dusha sare ama jeexdin; Tuubbada isku xirta ee ku taal gunta hoose ee weelka waa in ay isticmaashaa garab kor u kaca ama dhuuban oo waji leh.