Copper pipe for preserving refrigerants

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Product specificationTypes of copper pipe (Shape)

Types Characteristics Remark

Soft materials Softest material and easy to be machined. It is mainly for home air conditioning

Level wound,Pan cakeIt is available in Hisys

Hard Material

Hard Hardness and strength is largeMainly for piping material

Straight pipeIt is available in Hisys

1/2 Hard Material with a little ductility with hard material Straight pipeIt is unavailable in Hisys

Types of copper pipes (production)

Specification for copper pipe (KSD 5301)

LEVEL WOUND COIL

■Characteristics : An industrial copper pipe which is produced long length so that it can be used for continuous work inautomated production line and large construction site of system air condition(conditioner). It is able to contribute to shortening production time and improving productivity.

■Length : 300~1,300m ■Weigh : 150kg ■Packing : bobbin packing

PAN CAKE COIL

■Characteristics : An industrial copper pipe which is used for short length less than 15 m. It is easy to be dealt due to light weight and easy transportation.

■Length : 15m■Packing : boxing with corrugate cardboard and cap in both ends

STRAIGHT TUBES

■Characteristics : This tube is used as main pipe for large system airconditioning, and also its small diameter is gettingmore and more popular for beauty-purpose afterfinishing construction.

■Length : 6m ■Packing : Cap in both ends

Items Soft(Level wound, Pan cake) Hard(Straight pipe)

Types

Cu(copper) Over 99.9% Over 99.9%

Thickness

Tensile strength Over 205(N/mm2) Over 315(N/mm2)

Ductility Over 40%

Hardness - Over 55

RemarkOther items should exceed the standard of KSD 5301

Spec. Thickness(t)Specification for system air conditioner

Level wound Pan cake(15m) Straight pipe(6m)

ø6.35 0.70 CUPLW0607(approximately 1.300m) CUPR0607157

ø9.52 0.80 CUPLW0908(approximately 700m) CUPR090815 CUPS090806

ø12.70 0.80 CUPLW1208(approximately 500m) CUPR120815 CUPS120806

ø15.88 0.80 CUPLW1508

(approximately 450m) CUPR150815

1.00 CUPLW1510(approximately 350m) CUPR151015 CUPS151006

ø19.05 0.80 CUPLW1908

(approximately 350m) CUPR190815

1.00 CUPLW1910(approximately 300m) CUPR191015 CUPS191006

ø22.22 1.00 CUPS221006

ø25.40 1.00 CUPS251006

ø28.58 1.00 CUPS281006

ø31.75 1.10 CUPS311106

ø34.921.10 CUPS341106

1.20 CUPS341206

ø38.101.15 CUPS381106

1.35 CUPS381306

ø41.28 1.20 CUPS411206

1.45 CUPS411406

ø44.451.35 CUPS441306

1.55 CUPS441506

Remark Soft pipe(C1220T-O) Hard pipe(C1220T-H)

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Copper pipe for preserving refrigerants

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Superiority and environmentally friendliness of copper

Physical and mechanical characteristics of copper pipe

■Excellent effect for sterilization of pathogenic bacteriaCopper has good effects on sterilization for pathogenic

bacteria such as O-157, legionella. So it is suitable for

drinking water pipe

■No leakage due to corrosionCopper has strong corrosion-resistance, and its life is permanent. Therefore, there is no need to replace it as long as building is demolished.

■Excellent construction performanceThanks to its ductility and good welding connection, its construction performance is very good.

■Good earthquake-resistance and durabilityFor its good ductility and vibration absorption, it hasstrong earthquake-resistance and durability againstswaying of high buildings.

■Excellent pipe material for cold areaCopper pipe has good fatigue-resistance, and no bromination at low temperature, so it is able to keep uniform mechanical characteristics even at extremely low temperature making it pipe material in cold area.

■Environmentally-friendly material with recyclingCopper has good global environmental-friendliness thanks to its low emission of CO2 in its manufacturing,and also environmentally-friendly material with recycling.

■Copper pipe is economical Cooper is most economical material for its light weight, easy to be machined and installed and permanent life.

■Copper is absolutely necessary mineral for human bodyCopper is absolutely necessary ingredient not only forhuman body but also for human blood elements. 100mg of copper is necessary for health of adults, and some of its surplus is emitted through bile withoutaccumulation in human body.

■Needs to be water treatment depending on water qualityLike other metal, copper emits little copper ion dependingwater quality. If water is acidic or it is used in certainunderground water, blue coloring may appear because thewater delays creation of oxidation film, which needswater treatments.

■A gap and tensile strength of junction parts in copper

(kg/cm2)

10.0

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.05 0.10 0.15 0.20 0.25 0.30 0.35

Gap (mm)

(kg/cm2)

100

90

80

70

60

50

40

30

20

10

Soldering tensile strength

Brazingtensile strength

브레이징

솔더링

■Welding material for copper pipe

■Example of brazing : Standard B Cup-3Most suitable heating temperature is 750̊ C or so(When heating parts is dark red)

■Example of soldering : Standard Sn96Most suitable heating temperature is 220~320̊ C(When heating parts is pink and flux is boiling)

■Normal pressure in welding parts (kgf/cm²)

Items Brazing Soldering

Welding material Brazing filler metal Solder metal

Representative welding symbol B Cup-3 Sn96

Chemicalingredients (%)

Ag : 4.8~5.2P ; 5.8~6.7Cu : remains

Ag : 3.4~3.8Sn : remains

Weldingmaterial

Normaltemper-ature

nominal diameter of pipes forhot andcool water and heating

¼~1 1¼~2 2½~4 5~8 10~12

Sn9638 35.0 28.0 21.0 18.9 10.5

66 28.0 24.5 19.3 17.5 10.5

Sb593 21.0 17.5 14.0 12.6 9.8

120 14.0 12.3 10.5 9.5 7.7

For brazing(Melting point 540~760˚C)

Pressure and temperature is dependent onwelding material and construction method

Consider Expansion joint or loop (exposing)

Absorption of expansion and extractionamount using cushion (filling-up)

■Countermeasure for expansion and extraction

Guide

Anchor

Cushion

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3 principles for pipe construction

Cutting pipes

■Cautions1. Putting in and keeping it without deformation, bending, wrinkle and damage as it is delivered2. Do not use copper without caps in both ends3. Make sure to seal both ends so that moisture and foreign substance are not penetrated.4. Be sure to keep copper pipe laid for preventing deformation by pressure.5. It is recommended to use welding rod table so that dust and foreign substance are not penetrated for pipe welding.

누설누설

누설누설

▲

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1. Make sure to use pipe cutting machine for cutting pipes

2. Make sure to remove burrDon’t make pipe cutting dust penetrate into pipe inside surface by putting ends of pipe downward when you do pipe work.

Note If cutting dust penetrates into pipe inside, it may cause malfunctions.

Burr : Remains rolled up in end of cutting part

Reamer : Tools for widening or finishing hole

Flarer : Tool for making pipe end be shapes like a trumpet

in which one end is wide, the other is narrow.

pipe cutting machine

Pipes

Pipes

Pipes

Pipes

burr

burr

Reamer

Reamer

Reamer

make sure to cut it straight in its

cutting partsCautions

1. Dry

No moisture inside

2. Clean

No leavings inside

3. Air tight (sealing)

No leakage

Copper pipe for preserving refrigerants

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Welding for pipe construction

Sealing and preservation of copper pipe

■Cautions

1. The length of widened pipe is recommended to be 10mm (KS standards, withstanding 30 kgf/cm2 of internal pressure, and welding liquid is uniformly penetrated

2. Widened pipe welding should be performed for soft pipe(under ø 19.05), and socket weldingshouldn’t be performed for straight pipe(under ø 25.4 )

3. Do not perform flarer and butt joint welding in any case.4. All welding should be performed in welding table, and make sure that dust in bottoms is notpenetrated into pipes.

5. Do not let air flow into pipe by filling gap between pipe and nitrogen hose when flowing nitrogen.

6. When you do welding flowing nitrogen, flow it 2~3 minutes more until heat in welded area is cooled.

■ Copper pipe should be protected from dust or moisture in air sealed by caps

10mm 10mm

Widening pipe welding Socket welding

Flarer welding Butt joint welding

NitrogenNitrogen

1st airtight test

■11st airtight test is for checking whether pipe or junction of main or branch pipe is sealed, and inthis case of leakage test, pressure of nitrogen should be over 28.7kgf/cm2 for R22 pipe and38.7kgf/cm2 for R410a at least more than 24 Ha. Airtight should be checked in advance so thateven a minute leakage is not taken place.

2nd airtight test

■2nd airtight test is for checking airtight in flarer connecting part while pipe of outdoor and indoordevice of air conditioner are connected, and in this case of leakage test, pressure of nitrogenshould be over 28.7kgf/cm2 for R22 pipe and 38.7kgf/cm2 for R410a at least more than 24 Ha.Airtight should be checked in advance so that even a minute leakage is not taken place.

Pinch (welding for airtight)

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