This standard specifies the dimension, appearance, weight, technical requirements, test methods, inspection rules, packing, marking and quality certificate with regards to the hot-rolled seamless steel tubes for hydraulic pillar service.
This standard is applicable to hot-rolled seamless steel tubes for cylinder and pillar service for manufacturing coal mine hydraulic support and pillar. Other hot-rolled seamless steel tubes for hydraulic cylinder and pillar service may refer to this standard.
Foreword I 1 Scope 1 2 Normative References 1 3 Order Contents 3 4 Dimension, Appearance and Weight 3 5 Technical Requirements 4 6 Inspection and Test Method 9 7 Inspection Rules 10 8 Packing, Marking and Quality Certification 10