Under the commission of the National Steel Standard Technical Committee, Youfa has taken the lead or participated in drafting 12 national and industry standards, including the promulgated national standards: GB/T3091 "Welded Steel Pipe for Low-Pressure Fluid Transmission," GB/T 13793-2016 "Seamless Steel Pipe for Electric Welding," GB/T 28897-2012 "Steel-Plastic Composite Pipe," GB/T 31439.1-2015 "Wave Beam Steel Guardrail Part 1: Two-Wave Beam Steel Guardrail," and GB/T 31439.2-2015 "Wave Beam Steel Guardrail Part 2: Three-Wave Beam Steel Guardrail." The national standards currently under review include: GB/T 6725 "General Technical Requirements for Cold-Formed Steel" (under review) and GB/T 6728 "Cold-Formed Hollow Section Steel for Structural Use" (under review); the promulgated industry standards are: CJ/T 120-2016 "Plastic-Lined Composite Steel Pipe for Water Supply," and CECS 205-2015 "Technical Code for Construction of Stainless Steel Lined (Coated) Composite Pipe." The national standards currently under review include: CJ/T 192 "Stainless Steel Lined Composite Pipe" (under review) and CJJ/T 154 "Technical Code for Construction of Metal Pipeline for Water Supply" (under review); and the industry standards under development are: YB/T "Special Section Welded Steel Pipe." Youfa has implemented the national standard GB/T3091-2015 "Welded Steel Pipe for Low-Pressure Fluid Transmission," which has been in effect since June 1, 2016, and all Youfa products comply with the new national standards.