Copper coils

Soft annealed copper coils

Soft annealed (O temper) copper tube is heat-treated so it bends by hand or with a bender and can be flared. It is the standard tube for split AC and ductable refrigerant lines, supplied in coils that are cleaned, dehydrated and sealed at both ends.

OD range
6.35–50.80 mm (1/4″–2″)
Wall thickness
0.61–1.65 mm
Temper
Soft annealed (O / R220)

Specifications

Soft annealed copper coils at a glance.

BrandMexflow (Mehta Tubes)
MaterialPhosphorus-deoxidised copper, Cu-DHP (C12200), min. 99.9% Cu + Ag
TemperSoft annealed: O60 (ASTM) / R220 (EN)
Outside diameter6.35 mm (1/4″) to 50.80 mm (2″)
Wall thickness0.61 mm to 1.65 mm, depending on OD
Tensile strengthMin. 220 MPa
ElongationMin. 40%
HardnessApprox. 40–60 HV
Supply formPancake coils, 15 m to 100 m
Internal cleanlinessCleaned and dehydrated, ends capped or sealed
JoiningFlaring, brazing, swaging
StandardsIS · BS · EN · ASTM · AS · JIS (incl. ASTM B280, EN 12735-1)

Typical figures. Stocked sizes, wall thicknesses and lengths vary by brand and batch, so we confirm them with your quote.

Applications

Where it's used.

  • Copper coils for VRV / VRF
  • Copper coils for split AC
  • Bare copper tubes for instrumentation
  • PVC-coated copper tubes for instrumentation

Ranges below are from Mexflow by Mehta Tubes, whose copper we supply.

Good practice

  • For R32 and R410A, choose a wall rated for their higher pressure (at least 0.8 mm for 1/4″–1/2″ and 1.0 mm for 5/8″ is a common AC maker minimum)
  • Keep coil ends sealed until use so moisture and dirt stay out
  • Insulate both liquid and suction lines to stop sweating and heat gain

Size guide

Outside diameter and wall thickness.

Sizes from 6.35 mm (1/4″) to 50.80 mm (2″). Pick the size, then a wall thickness rated for your refrigerant; R32 and R410A need the heavier walls.

Nominal ODOD (mm)Wall thickness (mm)Enquire
1/4″ 6.35 0.610.710.81 Enquire
5/16″ 7.94 0.610.710.81 Enquire
3/8″ 9.52 0.610.710.81 Enquire
1/2″ 12.70 0.710.810.91 Enquire
5/8″ 15.88 0.810.911.00 Enquire
3/4″ 19.05 0.810.911.001.22 Enquire
7/8″ 22.22 0.911.001.22 Enquire
1″ 25.40 1.001.22 Enquire
1-1/8″ 28.58 1.001.221.27 Enquire
1-1/4″ 31.75 1.221.27 Enquire
1-3/8″ 34.92 1.221.40 Enquire
1-1/2″ 38.10 1.221.40 Enquire
1-5/8″ 41.28 1.221.52 Enquire
1-3/4″ 44.45 1.401.52 Enquire
2″ 50.80 1.521.65 Enquire

By application · Mexflow by Mehta Tubes

Soft annealed copper coils for every job.

Pick the application to enquire. Grades, tempers and size ranges are the manufacturer's published figures; we confirm exact sizes and stock with your quote.

Copper coils for VRV / VRF

Soft coils for the branch and indoor-unit runs of VRV and VRF systems.

Grade
C12200 (DHP copper)
Temper
Soft (annealed)
OD
4.76–22.22 mm (3/16″–7/8″)
Min. wall
0.508 mm (0.020″)
Supply
Coils, 15–100 m

Copper coils for split AC

Soft coils for the liquid and suction lines between indoor and outdoor units.

Grade
C12200 (DHP copper)
Temper
Soft (annealed)
OD
4.76–22.22 mm (3/16″–7/8″)
Min. wall
0.508 mm (0.020″)
Supply
Coils, 15–100 m

Bare copper tubes for instrumentation

Bare soft coils for instrument impulse lines and steam tracing.

Grade
C12200 (DHP copper)
Temper
Soft (annealed)
OD
4.76–22.22 mm (3/16″–7/8″)
Min. wall
0.508 mm (0.020″)
Supply
Coils, 15–100 m

PVC-coated copper tubes for instrumentation

PVC-sheathed coils for instrumentation and steam tracing where the tube needs protection.

Grade
C12200 (DHP copper)
Temper
Soft (annealed), hard, half hard, quarter hard
OD
4.76–22.22 mm (3/16″–7/8″)
Min. wall
0.508 mm (0.020″)
Supply
Coils, 15–100 m

Copper coils

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Tell us the sizes, wall thickness and length or quantity you need, or your AC model, and we'll confirm stock and price.

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