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Specific Product Coverage Philippine National Standard/s (PNS) Enabling Law  Product Image
Black iron (BI) and hot-dipped zinccoated (galvanized) welded steel pipes

PNS 26:2018
Steel - Black and hot-dipped zinc coated (galvanized) longitudinally welded steel pipes (for ordinary use) – Specification

Steel - Black and galvanized longitudinally welded lightweight steel tubes - Specification

Department Administrative Order (DAO) No. 19-16, Series of 2019
The New Technical Regulations Concerning the Mandatory Product Certification of Steel - Black and Hot-Dipped Zinc-Coated (Galvanized) Longitudinally Welded Steel Pipes (For Ordinary Uses)

Supplemental Guidelines for the Implementation of DAO 19-16, Series of 2019
 
Supplemental Guidelines for the Implementation of DAO 19-16, Series of 2019.
bi gi steel pipes