Txhim kho cov yeeb nkab grooved fittings yuav tsum tau ua raws li cov qauv nruj thiab tswj tag nrho cov txheej txheem -los ntawm kev npaj ua ntej mus txog qhov kawg kev lees paub- los tiv thaiv cov teeb meem xws li xau thiab deformation. Cov kev xav tshwj xeeb yog raws li hauv qab no:
Ua ntej -kev npaj kev teeb tsa
Cov ntaub ntawv pov thawj: Tag nrho cov kav dej, fittings, thiab gaskets yuav tsum tuaj nrog cov chaw tsim khoom pov thawj ntawm kev ua raws. Lawv yuav tsum tsis muaj qhov tsis xws luag xws li cov kab nrib pleb, xeb, lossis lub tshuab nqus tsev, thiab lawv cov kev qhia tshwj xeeb yuav tsum ua kom zoo rau cov kav dej.
Cov cuab yeej tshwj xeeb: Cov cuab yeej tshwj xeeb (xws li yob groovers thiab cov yeeb nkab cutters) yuav tsum tau ntsuas ua ntej. Siv cov roj ntsha nruab nrab zoo li cov dej soapy; roj- cov roj nplua nyeem raug txwv nruj raws li lawv tuaj yeem ua rau cov gaskets.
Kev them nyiaj yug/Hanger Pre-installation: Nruab cov yeeb nkab txhawb nqa thiab hangers raws li kev tsim qauv ua ntej kev teeb tsa yeeb nkab; tsis txhob cia siab rau cov couplings ib leeg los tuav qhov hnyav ntawm cov yeeb nkab.
Roll Grooving Theem
Pipe End Pre-kev kho mob: Tom qab txiav cov yeeb nkab steel, zom cov burrs thiab xyuas kom meej qhov kawg txiav yog perpendicular rau cov yeeb nkab lub hauv paus axis. Oxy-Acetylene txiav yog nruj me ntsis txwv.
Groove Dimension Control: Siv lub vernier caliper los xyuas kom meej tias qhov tob thiab dav raws li lub teb chaws tus qauv. Siv lub zog qis qis qis thiab sib npaug los tiv thaiv cov yeeb nkab kawg deformation (xws li flaring).
Kev Tiv Thaiv Kev Ua Haujlwm: Tig cov yeeb nkab ib zaug ua ntej grooving kom ntseeg tau tias tsis muaj kev sib raug zoo thiab qhov groove qhov tob tsis sib xws. Tom qab ua tiav, tshem tawm cov khoom seem galvanizing ntawm cov yeeb nkab kawg thiab siv los tiv thaiv - kev kho corrosion.
Fitting Connection thiab Installation Stage
Installation Sequence: Ua raws li lub hauv paus ntsiab lus ntawm kev txhim kho loj - txoj kab uas hla mains thiab risers ua ntej, ua raws li me me - txoj kab uas hla ceg kav; tsis txhob hla cov kauj ruam los yog nruab rau hauv ib qho fragmented yam.
Gasket Installation: Xyuas kom lub gasket haum nrog cov nruj nreem nyob ib ncig ntawm lub ncig. Yog tias wrinkling lossis bulging tshwm sim, hloov tam sim ntawd; tsis txhob yuam lub coupling kaw.
Coupling Tightening Requirements: Xyuas kom lub coupling lub tsa sawv lub rooj zaum tag nrho rau hauv grooves. Thaum zawm bolts, alternately symmetrically thiab siv zog maj mam thiab tusyees, kom ntseeg tau tias qhov kawg torque nyob rau hauv lub 25-30 N·m range.
Tshwj xeeb Fitting Installation: Rau cov neeg kho tshuab crosses, xyuas kom meej qhov qhib ntawm ob sab yog concentric; rau cov neeg kho tshuab tees, xyuas kom haum haum concentrically nrog lub qhov los tiv thaiv gasket rupture.