The packaging, marking, transportation, storage, and quality certificates of unshaped refractories must comply with the national standard GB/T 15545-2020, "General Provisions for Packaging, Marking, Transportation, Storage, and Quality Certificates of Unshaped Refractories." This standard, published in 2020, replaces the older version GB/T 15545-1995 and applies to all unshaped refractories.
Furthermore, the latest national standard related to the construction technology of unshaped refractories, GB/T 46062-2025, "Unshaped Refractories-Preparation of Refractory Spraying Specimens using Wet Spraying Technology," was published in 2025 and will officially come into effect on March 1, 2026.
