Technological Condition of Cast Iron Dryers Used in Paper Machinery
1 Scope
This standard specifies the technical requirements, test methods and inspection rules, markings, packaging, transportation and storage of cast iron dryers used as pressure vessels in paper machinery.
This standard is applicable to dryers and felt dryers (hereinafter referred to as "dryers") with an outer diameter not larger than 4600 mm and a design pressure not higher than 1.1 MPa for paper machinery, paper board machinery and pulp board machinery.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 191 Packaging — Pictorial Marking for Handling of Goods
GB/T 1348 Spheroidal Graphite Iron Castings
GB/T 5782-2000 Hexagon Head Bolt
GB/T 9439 Grey Iron Castings
GB/T 13306 Plates
JB/T 7945-1999 Methods for Testing the Mechanical Properties of Grey Cast Iron
QB/T 3917-1999 Dynamic Balancing of Rolls and Dryers of Paper Machine
Supervision Regulation on Safety Technology of Pressure Vessels
3 Technical Requirements
3.1 Basic requirements
3.1.1 The design, manufacturing, inspection and acceptance of the dryers shall not only be in accordance with those specified in this standard, but also comply with the relevant laws and decrees and regulations issued in China. The designer and manufacturer of dryers shall have the corresponding design and manufacturing license of special equipment.
