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求购:曝气管,aeration tubing 1. tubing shall be extruded from linear low density polyethylene with a nominal 0.012m diameter (0.014m id x 0.016m od). the wall thickness of the tube shall not be less than 0.0011 m.2. the inside wall of the tube will be impregnated with 10, 3 m tributyl tin maleate to inhibit bacterial growth.3. there shall be turbulent flow path emitters inserted every 0.6 m inside the tube.4. the emitters shall be impregnated with treflan to inhibit root penetration for a minimum of 10 years, which period will be guaranteed by the manufacturer.5. the tubing will be identified as being used for a non-potable purpose by means of two purple stripes permanently incorporated into the outside wall of the tube. country pakistan coiema engineeringaddb-58, block-5, gulshan-e-iqbal karachi, pakistan 75300. tel:92-21-4960905 fax:92-21-4834627 email:mail@iema.info website:http://www.iema.info link:manmr. ather mover
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