conduit classes - evt bs.pdf · steel conduit conduit. class 4 hot dip galvanised inside and out...
TRANSCRIPT
Pre Galvanised Conduits
Hot dip Galvanised Conduits
HANGZHOU EVT ELECTRICAL CO., LTD.Steel conduit
Conduit
.
Class 4Hot dip galvanised inside and out
Meets Class 4, heavy protection both inside and outside, as specified in BS 4568, BS 50086 and BS 61386.
BS 4568 / BS EN 61386 – class 4
External
Length Lengths Metres
bundle bundle
20mm
25mm
32mm
BS 4568 / BS EN 61386 – class 3
BSI Conduits & Fittings
Class 3External surface in line galvanised
Meets Class 3 heavy protection outside as Class 4 and medium protection inside as Class 2, as specified in BS 4568, BS 50086 and BS 61386.
Telephone: +86 (571)82452866 Fax: +86 (571)82351218-
3750mm
3750mm
3750mm
20
15
10
per small per small
75
56.25
37.5
Wall ThicknessDiameter
1.60mm
1.60mm
1.60mm
External
Length
Lengths Metres bundle bundle
20mm
25mm
32mm
3750mm
3750mm
3750mm
20
15
10
per small per small
75
56.25
37.5
Wall ThicknessDiameter
1.60mm
1.60mm
1.60mm
Classes
1
Covers
BSG
Gaskets
BSL
BS302B
BS301B
BS212B
BS211B
BS202B
BS201B
BS102B
BS101B
BS112
BS111
BS402EP
BS401EP
BS301EP
BS302EP
BS212EP
BS211EP
BS202EP
BS201EP
BS102EP
BS101EP
BS322
BS321
BS242
BS241
BS232
BS231
BS412
BS411
BS312
BS311
BS222
BS221
BS402
BS401
BS302
BS301
BS212
BS211
BS202
BS201
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
BS102
BS101
BSI Conduit & Fittings
Boxes (malleable)
Boxes (miscellaneous)
Galvanised terminal extension
Part no Size Per box
20mm
25mm
Galvanised through extension
Part no Size Per box
20mm
25mm
Galvanised angle extension
Part no Size Per box
20mm
Galvanised tee extension
Part no Size Per box
20mm
Galvanised tangent tee box
Part no Size Per box
20mm
25mm
Galvanised tangent angle
Part no Size Per box
20mm
25mm
Fittings
HANGZHOU EVT ELECTRICAL CO., LTD.
Telephone: +86 (571)82452866 Fax: +86 (571)82351218-
Galvanised Y box
Part no Size Per box
20mm
25mm
Galvanised H box
Part no Size Per box
20mm
Galvanised back outlet box
Part no Size Per box
20mm
Galvanised terminal and back outlet box
Part no Size Per box
20mm
25mm
Galvanised through and back outlet box
Part no Size Per box
20mm
25mm
Galvanised tee and back outlet box
Part no Size Per box
20mm
Galvanised angle and back outlet box
Part no Size Per box
20mm
Galvanised terminal box
Part no Size Per box
20mm
25mm
Galvanised through box
Part no Size Per box
20mm
25mm
Galvanised tee box
Part no Size Per box
20mm
25mm
Galvanised intersection box
Part no Size Per box
20mm
25mm
Galvanised angle box
Part no Size Per box
20mm
25mm
Galvanised U box
Part no Size Per box
20mm
25mm
10025mm
100
100
Galvanised tangent tee box
Part no Size Per box
20mm
25mm
100 25mm
100 25mm
100
Galvanised tee extension
Part no Size Per box
20mm
100 25mm
10025mm
100 25mm
100 25mm
Galvanised small box lids 2 hole – steel
Part no Per box
100
Galvanised small box lids 2 hole – steel
Part no Per box
100
2
MU25-3
MU20-3
MU25-1
MU20-1
100
100
100
200
100
200
MU25
MU20
Inspection Tees
Inspection Elbows
Solid Bends
Inspection Lines (malleable)
Inspection Bends
250
500
1000
1000
BSR4
BSR3
BSR2
BSR1
FB3
FB2
FB1
1000
1500
2000
Brass Bushes Female
500
1000
2000
500
1000
2000
63-2L
62-2L
61-2L
63-2S
62-2S
61-2S
Long Bushes
Short Bushes
Brass Bushes Male
Galvanised Spacer Bar Saddles
Galvanised Distance Saddles
Nipples (steel)
BSA33
BSA32
BSA31
BSA23
BSA22
BSA21
Circle LocknutsHexagonal Locknuts
Flanged Couplers (malleable)
32mmX6
25mmX6
20mmX6
BSA13
BSA12
BSA11
32mmX3
25mmX3
20mmX3
BSA3
BSA2
BSA1
1000
1500
2000
U203U202UV201
U32U25U20
100150200
5005001000
200300400
BSNP3BSNP2BSNP1
1000
1000100
BSCP2
BSCP1
(Complete with BMMMLead Washer)
200
300
400
BSFC3
BSFC2
BSFC1
200
300
400
63-1
62-1
61-1
Solid Couplers
Fittings
Galvanised milled edge lockrings
Part no Size Per box
20mm
25mm
32mm
Part no Size Per box
20mm
25mm
32mm
Part no Size Per box
20mm
25mm
32mm
Galvanised flanged couplers
Part no Size Per box
20mm
25mm
32mm
Crampets (flat)
Galvanised crampets
Part no Size Per box
20mm
25mm
Galvanised steel nipples
Part no Size Per box
20mm 25mm 32mm
Saddles
Part no Size Per box
20mm 25mm 32mm
Part no Size Per box
20mm 25mm 32mm
Telephone: +86 (571)82452866 Fax: +86 (571)82351218-
BSI Conduit & Fittings
Galvanised light pattern locknuts
Part no Size Per box
1000
1500
2000
32mmX6
25mmX6
20mmX6
32mmX3
25mmX3
20mmX3
1000
1500
2000
Galvanised light pattern locknutsPart no Size Per box
1000
1500
2000
Female brass bush
Part no Size Per box
20mm
25mm
32mm
Reducers
Galvanised reducers
Part no Size Per box
20 x 16mm
25 x 20mm
32 x 20mm
32 x 25mm
Galvanised solid bend (steel)
Part no Size Per box
SBEN20G 20mm 25
SBEN25G 25mm 10
Part no Size Per box
20mm
25mm
Part no Size Per box
20mm
25mm
Part no Size Per box
20mm
25mm
HANGZHOU EVT ELECTRICAL CO., LTD.
3
subsequent manufacturing processes.
Technical Notes
smooth and uniform finish with an excellent appearance.external bore of the Class 3 conduit tubes have a very(typical zinc thickness above 80 microns). The
and most cast products including circular conduit boxesClass 4 conduit tube (typical zinc thickness 50 microns)
significantly and may exceed 5 microns a year.
where necessary protected by zinc or paint coatings.
from appropriate grades of steel, malleable iron or brass,
Our BSI conduit fittings and conduit tubes are manufactured
and storage of the products.
These notes are intended to provide information and
guidance on standards, materials, finishes and the handling
We hope this section will assist stockists of our products,
their customers, including electrical contractors, and the
consultants responsible for preparing specifications. Please
contact us to seek further assistance or to raise any specific
queries you may have.
Materials and Finishes
Galvanised CoatingsUnprotected iron and steel will usually rust rapidly when
exposed to moisture and air. Zinc coatings prevent this
primarily by acting as a tough barrier between these metals
and the environment. Even if there is minor damage to the
galvanised coating then sacrificial erosion of the zinc will
continue to inhibit corrosion.
Rates of erosion of galavanised coatings reflect a number of
factors primarily the presence of moisture and atmospheric
pollutants such as sulphur dioxide (SO2). In warm dry
conditions loss of zinc may be less than 0.1 micron a year
but in coastal, marine or polluted environments this rises
It is important to understand the different types of zinc
coating available.
Hot dip galvanising after manufacture involves immersing
the article in molten zinc after all production processes,
other than tapping of threads, have been completed. It
provides the greatest amounts of protection and is used on
Pre-galvanised or mill galvanised steel is coated at the steel
mill by a hot dip process. Here the zinc coating thickness
is typically just under 20 microns and may be disrupted by
Zinc plated products have a much lower zinc thickness,
typically 7-8 microns which is applied electrolytically. It is
used to protect components such as fasteners and nipples
where other methods are not practical.
Storage of ConduitNewly galvanised articles have a bright, shiny surface finish
although this rapidly weathers to a matt dull appearance
as the protective patina develops. Ideally galvanised
products, in particular when newly galvanised should be
stored in warm dry conditions, preferably under cover. It
is important to prevent freshly galvanised steel becoming
wet, particularly if air is not free to circulate, since these
conditions lead to formation of a white powdery deposit
know as wet storage stain or white rust. Should this occur
the deposits can easily be removed by mild abrasion. The
reduction in the zinc coating thickness is rarely significant
and can be easily checked with an electronic thickness
gauge to confirm that the anticipated maintenance free
period remains adequate.
Standards
BS 4568 : Part 1 and Part 2 : 1970These national standards cover the supply of metric product including the most popular 20mm, 25mm and 32mm sizes and remain the best source of detailed dimensional information on these products. Part 2 includes ‘standards sheets’ which cover the main product groups. Top Tubes Electrical products comply with these sheets for example, small circular boxes sheet 4, large circular boxes sheet 5, distance saddles sheet 23.
BS EN 50086 SeriesThis ‘family’ of European standards was drawn up to cover conduit systems and was ultimately intended to replace national standards. They employ defined tests to cover measurement of parameters such as resistance to compression and impact strength with graded classifications which allow the standard to cover both metal products and plastic equivalents. It should be noted that many plastic equivalents to metal conduit systems are less strong, may be subject to more restricted temperature installation
typically exceed the performance required to meet the most stringent mechanical and strength tests. Resistance to corrosion tests remain virtually unchanged from those included in BS 4568.
BS EN 61386 SeriesThis family of standards is very similar to and is now replacing the BS EN 50086 series. They are intended to cover ‘Conduit Systems for Cable Management’ and their content is identical with the International standard IEC 61386.
and.standards
BSI Conduit & Fittings HANGZHOU EVT ELECTRICAL CO., LTD.
Telephone: +86 (571)82452866 Fax: +86 (571)82351218-
limits or could prove problematic under fire conditions. Our BSI conduit products
4