Flashcards
Common Plumbing Processes
Flashcards do conjunto (26)
- 1Units of measurements plumbers useMillimetres mm
Centimetres cm
Metres m - 2Tools used to measureSteel Rule
Tape Measure
Site Tape
Laser Distance - 3Tools used to bend copperHand Bender
Scissor Bender
Stand Bender
Electric Tube Bender
Internal Spring
External Spring - 4Grades of copperR220 Coiled Microbore
R250 Half Hard Straight Lengths
R220 Underground - 5Diameter of copperMinibore/microbore: 6, 8, 10mm
Small bore: 12, 15, 22mm
Large bore: 28mm and larger - 6Coated copperYellow Gas
Green Water
White General Purpose
Blue Wholesome Water - 7Radius centre line4 x Diameter of the pipe (4D)
- 8Radius of a pipeRadius x 2 x 3.14
4 - 9X dimensionsCentre of fitting to the engaged length
- 10Grades of LCSHeavy
Red
Steam and fire systems
Medium
Blue
Heating and oil lines
Light
Brown
Gas - 11LCS jointing methodsThreading
Welding
Special Compression Joints - 12LCS protectionGalvanized
(Inside and outside)
Denso tape
(Wrapped outside only)
Paint
(Outside only)
Chemical
(Inside only) - 13Bending LCSWhen bending, it stretches in both directions.
LCS stretches by its nominal bore:
½in = 15mm ¾in = 20mm - 14Z dimensionsCentre of fitting to the engaged length
- 15ThreadingFree Standing Machine
Handheld Threading Machine
Handheld Die - 16Types of plasticPVCu
MDPE
HDPE
Polypropylene
Polybutylene
ABS - 17PolypropyleneWaste pipes
Overflow
CWSC
Degrades in direct sunlight
Feels slightly greasy to touch
Not solvent welded - 18PolybutyleneCold water
Hot water
Central heating
Push fit
Compression
Not solvent welded - 19ABS Acrylonitrile Butadiene StyreneCommercial water
Waste
Overflow
Solvent welded
Degrades in sunlight - 20PVCuUnplasticised polyvinyl chloride
Cold water
Soil pipes
Waste and overflow pipes
Guttering and downpipe
Not suitable for hot water
Solvent weld
Push fit - 21MDPEMedium density polyethylene
Underground mains (blue)
CWSC
Degrades in sunlight
Fusion welded
Push fit
Compression - 22HDPEHigh density polyethylene
Underground mains (black)
Degrades in sunlight
Fusion welded
Push fit
Compression - 23BendingPlastic pipe is usually fabricated using fittings on waste pipes.
Polybutylene (hot, cold and central heating) is flexible and
can be laid around corners, if supported. - 24X dimensionsOn plastic, the X dimensions are manually measured and worked out
- 25Soil and waste plasticPVCu plastic is used for push fit and solvent welded soil, waste pipes, overflow pipes, guttering and below ground drainage. 110mm, 50mm, 40mm, 32mm and 21.5mm
- 26soil and waste plasticPolyethylene (PE) is used a lot in the plumbing trade
Medium density polyethylene (MDPE), is hardwearing and is used for water mains (blue) and gas mains (yellow). It degrades when exposed to UV light. 20mm-63mm in coils.
The most common is 25mm cold water service pipe
High density polyethylene (HDPE), was used some years ago and is still found in properties but it was superseded
by MDPE
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- BTEC Construction and the Built Environment FlashCards sobre Common Plumbing Processes, criado por stephen lowe em 05-01-2021.
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- stephen lowe
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