Pyramid of Plastic
The above pyramid of plastics/polymer is a ranking of plastics according to their hazardous characteristics.PVC, the least clean plastic, is at the top of the pyramid, and biobased plastic such as natural rubber, the cleanest plastic, is at the pyramid base. Naturally, biobased plastics itself has limited characteristics and cannot be used in many applications without certain chemicals added, When certain chemicals are added, the biobased plastics also lose their natural cleanliness. In practice, this leaves polyethylene(PE) and polypropylene(PP) to be the cleanest plastics for general applications.
SYLER -THE CLEANLINESS YOU CAN TRUST
With the ISO 9001-2000 quality system certified be FM Approved every single SYLER pipe will meet the quality ofits standards.
Moreover, SYLER pipe passes all tests under a standard of BS 1987/85 Class M. This assures you that the thickness of the steel pipe and its thick zinc coating will result in the long product lifetime. In connection with the cleanliness, SYLER pipe passes all the tests under a standard of BS 6920 Part II, one of the most stringent standards of cleanliness of water pipe. Conducted by Nutek System, one of the world's leading test labs, the test report shows that:
SYLER pipe passes all the tests on water quality: taste, odor, color change.
The extraction of 13 different metals (after containing water for 2 months) is 20-500 times lower than standard.
Growth of aquatic micro-organisms (after containing water for 2 months) is 13 times lower than the standard.
SYLER pipe has been tested under the standard of BS 6920 Part II by the Department of Science Service.
SYLER pipe had been tested under the standard of BS 1387/85 Class Medium by Faculty of Engineer, Chulalongkorn University.
SYLER pipe had been tested under the standard of both BS 1387/85 Class Medium and BS 6920 Part II by Nutek System Co.,Ltd, a leading lab test to approve the products to be used be Water Authority of Hong Kong.