3PE anti-corrosion steel pipe standard

　　The implementation of SY/T0413-2002 standards, in August 1, 2002 since the implementation of. Standard forpolyethylene and high density polyethylene, VEKA softening point for not less than 110 DEG C; anticorrosion layerthickness according to the low, medium density polyethylene consisting mainly of German standard DIN30670-1991 to determine. Greatly improve the impact strength of 3PE anticorrosion layer. SY/T0413-2002 3PE anticorrosion layerpeeling strength, impact resistant indexes greatly increased, and clearly specified according to some special materialcontent of carbon black, ensure that the 3PE coating on the mechanical strength and weather resistance, and increasedcoating peeling strength ( i.e. the heat-shrinkable sleeve, shrink with the primer steel peel strength ) sampling frequency.