Manufacturers and Exporters of copper and copper alloy products
  • AN ISO 9001-2008 Certified Company
Sunflex Metal Industries

Medical Grade Copper Pipe



  • Sunflex Metal Industries pressurized ACR/Med copper tubing is available in 10,12, and 20 ft. lengths, and a variety of sizes, both Type L and Type K.
  • Each product conforms to ASTM B-280/B-819 specifications, is specially cleaned, de-burred, purged and pressurized with nitrogen gas, and features easy to remove, installer friendly, rubber plugs.
  •  Sunflex Metal Industries uses modern and environment friendly aqueous degreasing system to achieve the ASTM B 280 cleanliness limit of less than 0.0035 g/sq. ft on interior surfaces. 


  • Particularization should be given to:

    1. Site Cleaning of tubes and components.
    2. Pipeline gas purging during brazing.
    3. Use of approved filler metals and fluxes.
    4. Post brazing cleaning and visual inspection of all joints.
    5. Full compliance with pressure and containment testing, before final approval and use.

    SPECIFICATION

    Actual tube size

    Safe Working Pressure (kPa)

    OD

    (inches)

    OD

    (mm)

    Wall
    Thickness
    (mm)

    Nominal
    tube
    mass
    (kg/6m)

    Service Temperature(0C)

    50

    55

    60

    65

    70

    75

    3/16"

    4.76

    0.71

    0.48

    12715

    12280

    11845

    11410

    10980

    10545

    1/4"

    6.35
    6.35
    6.35

    0.71
    0.81
    0.91

    0.68
    0.76
    0.83

    9175
    10635
    12140

    8860
    10270
    11730

    8550
    9910
    11315

    8235
    9545
    10900

    7920
    9180
    10485

    7610
    8820
    10070

    5/16"

    7.94
    7.94

    0.81
    0.91

    0.97
    1.08

    8290
    9430

    8005
    9110

    7725
    8790

    7440
    8465

    7160
    8145

    6875
    7820

    3/8"

    9.52
    9.52
    9.52

    0.71
    0.81
    0.91

    1.05
    1.19 
    1.32

    5900
    6800
    7720

    5700
    6570
    7455

    5495
    6335
    7190

    5295
    6105
    6930

    5095
    5870
    6665

    4895
    5640
    6400

    ½"

    12.70
    12.70
    12.70

    0.71
    0.81
    0.91

    1.44
    1.62 
    1.81

    4345
    4995
    5655

    4195
    4825
    5460

    4050
    4655
    5270

    3900
    4480
    5075

    3750
    4310
    4880

    3605
    4140
    4685

    5/8"

    15.88
    15.88
    15.88

    0.81
    0.91
    1.02

    2.06
    2.30
    2.56

    3945
    4460
    5030

    3810
    4310
    4860

    3675
    4155
    4690

    3540
    4000
    4515

    3405
    3850
    4345

    3270
    3700
    4170

    3/4"

    19.05
    19.05
    19.05

    0.91
    1.02
    1.14

    2.78
    3.10
    3.44

    3600
    4150
    4670

    3475
    4010
    4510

    3355
    3230
    4350

    3230
    3725
    4190

    3110
    3585
    4030

    2985
    3445
    3870

    7/8"

    22.22
    22.22
    22.22
    22.22

    0.91
    1.22
    1.40
    1.63

    3.27
    4.32
    4.91
    5.66

    3140
    4265
    4930
    5795

    3030
    4120
    4760
    5600

    2925
    3970
    4595
    5400

    2815
    3830
    4425
    5205

    2710
    3680
    4255
    5005

    2600
    3535
    4090
    4805

    1"

    25.40
    25.40
    25.40

    0.91
    1.22
    1.63

    3.76
    4.97
    6.53

    2730
    3705
    5025

    2640
    3580
    4855

    2545
    3450
    4685

    2450
    3525
    4510

    2360
    3200
    4340

    2265
    3070
    4170

    1/8"

    28.58
    28.58
    28.58
    28.58

    0.91
    1.22
    1.63
    1.83

    4.25
    5.63
    7.41
    8.25

    2420
    3275
    4435
    5015

    2335
    3165
    4285
    4845

    2255
    3050
    4135
    4670

    2170
    2940
    3980
    4500

    2090
    2830
    3830
    4330

    2005
    2715
    3680
    4160

    1.1/4"

    31.75
    31.75
    31.75

    0.91
    1.22
    2.03

    4.73
    6.28
    10.17

    2170
    2935
    5005

    2095
    2835
    4835

    2025
    2735
    4665

    1950
    2635
    4495

    1875
    2535
    4325

    1800
    2435
    4150

    1 3/8"

    34.92
    34.92
    34.92

    0.91
    1.22
    2.03

    5.22
    6.93
    11.26

    1970
    2660
    4525

    1900
    2570
    4370

    1835
    2480
    4220

    1770
    2390
    4065

    1700
    2300
    3910

    1635
    2210
    3755

    1½"

    38.10
    38.10

    1.22
    2.29

    7.59
    13.83

    2435
    4690

    2350
    4530

    2265
    4370

    2185
    4210

    2100
    4050

    2020
    3890

    1 5/8"

    41.28
    41.28
    41.28

    0.91
    1.22
    2.41

    6.19
    8.24
    15.79

    1660
    2240
    4550

    1605
    2165
    4390

    1545
    2090
    4235

    1490
    2010
    4080

    1435
    1935
    3925

    1375
    1860
    3770


    • Safety standards for oxygen and other positive-pressure medical gases require the use of Type K or L copper tube (see ASTM B 819). Special cleanliness requirements are called for because oxygen under pressure may cause the spontaneous combustion of some organic oils (the residual of lubricating oil used during manufacture) and for the safety of patients receiving medical gases.

    • Copper tube for medical gas lines is furnished by the manufacturers suitably cleaned and capped or plugged. Care must be taken to prevent contamination of the system when the caps or plugs are removed and tube is installed. The installer must satisfy himself and the inspection department that the cleanliness requirements of the code have been met.



    Dimensions and Physical Characteristics of Copper Tube: Medical Gas, K and L

    Nominal or Standard Size, inches

    Nominal dimensions, inches

    Calculated values (based on nominal dimensions)

    Outside diameter

    Inside diameter

    Wall thickness

    Cross sectional area of bore, sq. inches

    Internal surface, sq. ft. per linear ft.

    Weight of Tube only, pounds per linear ft.

    Contents of tube, cu. ft. per linear ft

    1/4

    K

    .375

    .305

    .035

    .073

    .0789

    .145

    .00051

    L

    .375

    .315

    .030

    .078

    .0825

    .126

    .00054

    3/8

    K

    .500

    .402

    .049

    .127

    .105

    .269

    .00088

    L

    .500

    .430

    .035

    .145

    .113

    .198

    .00101

    1/2

    K

    .625

    .527

    .049

    .218

    .130

    .344

    .00151

    L

    .625

    .545

    .040

    .233

    .143

    .285

    .00162

    5/8

    K

    .750

    .652

    .049

    .334

    .171

    .418

    .00232

    L

    .750

    .666

    .042

    .348

    .174

    .362

    .00242

    3/4

    K

    .875

    .745

    .065

    .436

    .195

    .641

    .00303

    L

    .875

    .785

    .045

    .484

    .206

    .455

    .00336

    1

    K

    1.125

    .995

    .065

    .778

    .261

    .839

    .00540

    L

    1.125

    1.025

    .050

    .825

    .268

    .655

    .00573

    1-1/4

    K

    1.375

    1.245

    .065

    1.222

    .326

    1.04

    .00845

    L

    1.375

    1.265

    .055

    1.26

    .331

    .884

    .00873

    1-1/2

    K

    1.625

    1.481

    .072

    1.72

    .388

    1.36

    .0120

    L

    1.625

    1.505

    .060

    1.78

    .394

    1.14

    .0124

    2

    K

    2.125

    1.959

    .083

    3.01

    .522

    2.06

    .0209

    L

    2.125

    1.985

    .070

    3.09

    .520

    1.75

    .0215

    2-1/2

    K

    2.625

    2.435

    .095

    4.66

    .638

    2.93

    .0323

    L

    2.625

    2.465

    .080

    4.77

    .645

    2.48

    .0331

    3

    K

    3.125

    2.907

    .109

    6.64

    .761

    4.00

    .0461

    L

    3.125

    2.945

    .090

    6.81

    .761

    3.33

    .0473

    3-1/2

    K

    3.625

    3.385

    .120

    9.00

    .886

    5.12

    .0625

    L

    3.625

    3.425

    .100

    9.21

    .897

    4.29

    .0640

    4

    K

    4.125

    3.857

    .134

    11.7

    1.01

    6.51

    .0811

    L

    4.125

    3.905

    .110

    12.0

    1.02

    5.38

    .0832

    5

    K

    5.125

    4.805

    .160

    18.1

    1.26

    9.67

    .126

    L

    5.125

    4.875

    .125

    18.7

    1.28

    7.61

    .130

    6

    K

    6.125

    5.741

    .192

    25.9

    1.50

    13.9

    .180

    L

    6.125

    5.854

    .140

    26.8

    1.53

    10.2

    .186

    8

    K

    8.125

    7.583

    .271

    45.2

    1.99

    25.9

    .314

    L

    8.125

    7.725

    .200

    46.9

    2.02

    19.3

    .325

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