... payment terms:T/T30% in advance 3.ISO9001,ISO14001 THREE LAYER PE ANTICORROSION STEEL PIPEAbout us: 1 ... China in the latest 10years.4. Our quality: pass ISO9001, ISO140015. Our price is ... projects, just as Beijing Shougang Co.,Ltd, Beijing 201 Thermal Co.,Ltd and so on.product ... and strong tenacity;3. Strong anti stress fissionability, high impact resistance performance;4. High sealing with strong ...