15702 Polyethylene/Aluminum Raw Plastic Tubing, 0.250 in. OD x 0.040

Overview

The 15702 is 1/4 in. OD Synflex 1300 tubing that has a high-density polyethylene (HDPE) jacket, overlapped aluminum tape, and ethylene copolymer liner. The aluminum layer limits diffusion of gases through the wall of the tube, making it the best option for delivering sample air from an intake to a gas analyzer.

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Frequently Asked Questions

Number of FAQs related to 15702: 7

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  1. No. The tubing can be purchased from another vendor. When making a purchase, remember that Campbell Scientific recommends Synflex 1300, ¼ in. outer diameter (OD) tubing for the AP200.

  2. Campbell Scientific recommends Synflex 1300 (pn 15702, Raw Plastic Tubing .250 in. OD). This tubing has a durable polyethylene jacket and an aluminum wrap to limit diffusion through the wall. The aluminum layer also makes this tubing easier to work with, as it does not tend to spring back into a coiled shape as much as other tubing types.

  3. It is easy to learn how to cut tubing to length and swage the fittings. However, if it is preferred, order tubing assemblies cut to a specified length using pn 21823-L, Calibration Gas Tubing Assembly.

  4. The inserts prevent the tubing from collapsing as the ferrules are swaged onto the tubing. Although it is possible to make a leak-tight connection without an insert, the insert provides added protection against leaks. This is particularly true for tubes at negative pressure and for repeated tubing disconnect/connect cycles.
  5. Campbell Scientific recommends the durable polyethylene jacket and aluminum wrap of the Synflex 1300, ¼ in. outer diameter (OD) tubing (pn 15702).

    Standard polyethylene tubing, in contrast, does not have the aluminum layer and, consequently, allows some diffusion through the wall. Standard polyethylene tubing is also harder to work with. The best alternative is to use black polyethylene for UV resistance and to specify a ¼ in. OD with a 0.040 in. wall thickness.

  6. Refer to the Swagelok appendix in the AP200 or CPEC200 instruction manual.

  7. Make sure the fitting is a ¼ in. Swagelok. It is possible that it is 6 mm instead. Metric fittings can be identified by the groove on the hex body of the fitting. If the fitting is 6 mm, replace the fitting on the regulator with a ¼ in. Swagelok, or use an adapter fitting.

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