Home / Standards / GB 7231-2003 GB 7231-2003 Abolished Basic identification colors and code indications and safety sign for industrial pipelines 工业管道的基本识别色、识别符号和安全标识 Standard Type GB ICS 13.100 CCS C65 Status 废止 Issue Date 2003-03-13 Implementation 2003-10-01 Responsible Dept 应急管理部 Drafting Unit N/A