ผลิตภัณฑ์โลหะ
เอกสารมาตรฐาน
สหรัฐอเมริกา
AASHTO
M 246-22
Steel Sheet, Metallic-Coated and Polymer-Precoated, for Corrugated Steel Pipe
2022
7
HM42-2022 part 1
This specification covers polymer-precoated steel sheet for corrugated steel pipe (CSP), which is coated after metallic coating on continuous lines by coil coating (roller coating or laminating) processes. The metallic coating is either zinc or aluminum-zinc alloy. Sheet for this purpose is furnished flat in coils, flat in cut lengths, or corrugated in cut lengths, all being protected by a millapplied polymer coating on one or both sides.