Capillary Tubes : Specifications -

Stainless Steel Capillary Tubes :

Standards : ASTMA213, ASTMA312, ASTMA269, ASTM A554, JIS G3463, JIS3446, JIS3448, JIS3459

Grade : 304, 304L, 316, 316L

Size : 1mm OD to 10mm OD

Wall Thickness : 0.03 to 1.0mm SWG

Type : Seamless & Welded

stainless steel Capillary Tubes

Copper Capillary Tubes :

Standards : ASTM B360 , EN 12450, Cu-DHP

Grade : ASTM B280, JIS H3300, AS/NZS1571.JIS3300 2006

Size Range : 2mm~OD to 610mm OD

Wall Thickness : 0.5mm to 80mm

Length : 1m, 2m, 3m, 6m, or as required.

Carbon Steel Capillary Tubes

Capillary Tubes Chemical Composition :

DHP Copper Phosphorus - 0.015 to 0.035 %
Copper - Balance
DLP Copper Phosphorus - 0.05 to 0.012 %
Copper - Balance
TEMPER H, HH. ¼ H, O (soft annealed )
OL (Light annaealed)


Gauge Outside Diameter Tolerance mm Regular Wall (RW) mm Thin Wall (TW) mm Extra Thin Wall (XTW) mm Ultra Thin Wall (UTW) mm
30 0.304 - 0.317 0.064 - 0.089
29 o.330 - 0.342 0.064 - 0.089
28 0.355 - 0.368 0.076 - 0.102
27 0.406 - 0.419 0.089 - 0.115 0.064 - 0.089
26 0.457 - 0.469 0.089 - 0.114
25 0.508 - 0.520 0.115 - 0.140 0.089 - 0.114
24 0.558 - 0.571 0.114 - 0.140 0.089 - 0.114 0.051 - 0.102
23 0.635 - 0.647 0.140 - 0.165 0.089 - 0.114 0.051 - 0.102
22 0.711 - 0.723 0.140 - 0.165 0.096 - 0.121 0.077 - 0.102 0.051 - 0.102
21 0.812 - 0.825 0.140 - 0.165 0.102 - 0.127 0.051 - 0.102
20 0.901 - 0.914 0.108 - 0.165 0.108 - 0.134
19 1.054 - 1.079 0.166 - 0.216 0.102 - 0.140 0.070 - 0.108
18 1.257 - 1.282 0.191 - 0.241 0.127 - 0.165 0.083 - 0.121 0.051 - 0.102
17 1.460 - 1.485 0.177 - 0.229 0.115 - 0.152 0.083 - 0.127 0.057 - 0.102
16 1.638 - 1.663 0.204 - 0.254 0.127 - 0.165 0.096 - 0.133 0.070 - 0.121
15 1.816 - 1.841 0.204 - 0.254 0.127 - 0.165 0.096 - 0.134 0.070 - 0.121
14 2.082 - 2.133 0.216 - 0.292 0.165 - 0.229 0.114 - 0.165 0.076 - 0.134
13 2.387 - 2.438 0.267 - 0.343 0.191 - 0.267
12 2.743 - 2.749 0.267 - 0.321
11 3.023 - 3.073 0.293 - 0.368 0.216 - 0.292
10 3.378 - 3.429 0.318 - 0.394 0.216 - 0.292


Copper Capillary Tubes Dimensions :

Pipe / Tube Type Nominal
Pipe Size
O.D. I.D. Wall Thickness
K L M DWV K L M DWV
ASTM B360 Copper Capillary Tubes 1/4" 3/8" 0.305 0.315 - - 0.035 0.030 - -
ASTM B360 Copper Capillary Tubes 3/8" 1/2" 0.402 0.430 0.450 - 0.049 0.035 0.025 -
ASTM B360 Copper Capillary Tubes 1/2" 5/8" 0.527 0.545 0.569 - 0.049 0.040 0.028 -
ASTM B360 Copper Capillary Tubes 5/8" 3/4" 0.652 0.666 - - 0.049 0.042 - -
ASTM B360 Copper Capillary Tubes 3/4" 7/8" 0.745 0.785 0.811 - 0.065 0.045 0.032 -
ASTM B360 Copper Capillary Tubes 1" 1-1/8" 0.995 1.025 1.055 - 0.065 0.050 0.035 -
ASTM B360 Copper Capillary Tubes 1-1/4" 1-3/8" 1.245 1.265 1.291 1.295 0.065 0.055 0.042 0.040
ASTM B360 Copper Capillary Tubes 1-1/2" 1-5/8" 1.481 1.505 1.527 1.541 0.072 0.060 0.049 0.042
ASTM B360 Copper Capillary Tubes 2" 2-1/8" 1.959 1.985 2.009 2.041 0.083 0.070 0.058 0.042
ASTM B360 Copper Capillary Tubes 2-1/2" 2-5/8" 2.435 2.465 2.495 - 0.095 0.080 0.065 -
ASTM B360 Copper Capillary Tubes 3" 3-1/8" 2.907 2.945 2.981 3.030 0.109 0.090 0.072 0.045


Marking & Packing
Our products like stainless steel, carbon steel, duplex steel, alloy steel Capillary Tubes are packaged to make sure that there’s no damage throughout transit. Just in case of exports, customary export packaging is completed in wooden boxes or cases. All stainless steel, carbon steel, duplex steel, alloy steel Capillary Tubes are marked with Trademark (Company’s LOGO), Grade, Size and Lot No. On requests we can do custom marking on our products.

Test Certificates
Manufacturer Test Certificate as per EN 10204-3.1, EN 10204-3.2, Raw Materials Certificate, NABL approved Lab Test Report, 100% Radiography Test Report, Third Party Inspection Report etc.