TIV THAIV THIAB SPIGOT LAP WELD Joint / Tswb thiab SPIGOT SPIRAL STEEL PIPE
Khoom
Lub tswb thiab spigot kauv steel yeeb nkab yog ib qho ntawm feem ntau siv cov pob qij txha hauv cov dej steel thiab cov kav dej khib nyiab. Ua pov thawj kev ua tau zoo nyob rau hauv cov ntawv siv tawv tshaj plaws, yooj yim rau nruab, thiab muaj rau tag nrho cov yeeb nkab diameters, qhov kev sib koom ua ke no yog ib qho kev lag luam ntawm kev txwv rau kev kub siab AWWA steel kav dej.
Qhov kev sib koom ua ke yog tsim los ntawm kev nthuav dav ib kawg ntawm cov yeeb nkab los tsim ib qho "tswb" zoo li. Lwm qhov kawg ntawm cov yeeb nkab uas nyob ib sab yog hu ua "spigot." Cov pab pawg txhim kho ntxig lub hau rau hauv lub tswb kawg ntawm lub kaum sab xis me ntsis thaum lawv koom nrog. Tom qab ntawd cov yeeb nkab tau ruaj ntseg nrog ib qho los yog ob npaug-circumferential fillet weld, qhov sib npaug ntawm qhov loj me mus rau qhov tuab ntawm daim nyias nyias. Lap-welded yeeb nkab nrog ib txoj kab uas hla ntawm 30" los yog ntau dua tuaj yeem welded los ntawm sab hauv. Sab hauv vuam feem ntau yog siv rau "weld tom qab rov qab" txoj kev ntawm faus yeeb nkab installation. mus rau backfilling ntawm cov yeeb nkab welding sab hauv yog ua tiav tom qab backfilling, uas zoo heev tsub kom cov yeeb nkab installation nqi thiab txo tus nqi tag nrho ntawm qhov project.
Qhov tsawg kawg nkaus sib tshooj ntawm lub tswb sib dhos thiab cov ntu ntu yog 1 nti / 25 hli, lossis peb zaug ntawm qhov tuab ntawm lub tswb, qhov twg ntau dua. Tsis muaj qhov chaw welds yuav tsum nyob ze tshaj 1 nti / 25 hli mus rau qhov ze tshaj plaws ntawm tangency mus rau lub tswb vojvoog. Kev sib koom ua ke kev sib raug zoo ua raws li ANSI/AWWA C206.
Weld integrity tshuaj xyuas thiab kuaj ua raws li cov qauv kev coj ua tau teev tseg hauv AWWA C206, Field Welding of Steel Water Pipe. Nondestructive testing (NDT) ntawm welded pob qij txha suav nrog kev kuaj pom thiab kuaj hydrostatically ntawm cov kav dej thiab cov khoom siv, tshwj tsis yog lwm txoj hauv kev tsis muaj kev puas tsuaj tau pom zoo los ntawm tus neeg yuav khoom.
Lub tswb thiab spigot sib koom ua ke tso cai rau angular deflection los ntawm rub tus spigot txheeb ze rau lub tswb raws li ntu txuas nrog. Rau ntxiv deflection, lub tswb tuaj yeem mitered mus txog 5 degrees. Qhov no tso cai rau angular deflection yam tsis tau siv lub luj tshib fabricated thiab muaj txiaj ntsig zoo rau kev hloov pauv me me los yog ntev-radius curves.
Welded lap joints yog muaj nyob rau hauv loj-diameter faus steel pipelines rau cov dej xa mus thiab ua raws li cov lus qhia nyob rau hauv AWWA M11 thiab AWWA C206. Lawv cov nqi tsim kho qis dua thiab pov thawj keeb kwm ntawm kev siv ua rau lawv muaj kev ntseeg siab, kev sib koom ua lag luam uas tseem nrov niaj hnub no.
Cov txiaj ntsig ntawm Lap Welded Joints
- Muaj rau tag nrho cov yeeb nkab diameters
- tuaj yeem ua haujlwm siab heev
- Kev sib dhos yooj yim thiab haum rau hauv qhov chaw
- Pov thawj kev ua haujlwm keeb kwm
- Economical txoj kev rau txwv longitudinal thrust nyob rau hauv faus kav
- Joint tso cai rau angular deflection
- Kev ua tau zoo heev thaum muaj xwm txheej seismic
Qhov zoo tshaj plaws siv rau
- Cov kav dej xa mus
- High pressure pipelines
- Cov chaw nrog cov av tsis sib xws
- Qhib trench installation
- Cov cheeb tsam ntawm kev ua haujlwm siab seismic
