Since 2005，the special precision tubes produced byBaoyin includes tubes for fast-speed train, instead of importing and realizeddomestically.

Baoyin led the drafting of 1 National Production andManufacturing Standards GB/T 34107-2017“Precision stainless steel seamless tube for rail transit vehiclebraking system ”

Dimension: OD 8～43×1～3.5

Process: Piercing, cold-rolling

Standard: GB/T 34107-2017、GB/T 14976-2012、 Special technical protocol

Steel type: 06Cr19Ni10（S30408，0Cr18Ni9）、1Cr18Ni9Ti（06Cr18Ni11Ti）