Copper Tubing Specifications
Medical Gas Tubing must meet ASTM B-819 specifications. It is cleaned for oxygen service and delivered capped. It must bear the following marking, MED, OXY, MEDOXY or OXYMED.
Tubing is manufactured in two different grades, L & K. Type K tubing has a heavier wall thickness. Thus it can withstand higher pressures, is heavier, and has less cross sectional size. It is used for pressures over 200 psi (Nitrogen systems).
Both type K & L tubing have the same OD (outside dimension), so all wrought copper fittings will work with both sizes of tubing. Here is a handy chart of specifications.
TYPE "L" MED/OXY
TYPE "K" MED/OXY
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