Some standard content:
JB | | tt | packing for pressure vessels transport2003-03-17 Released
Implemented on 2003-07-01
State Economic and Trade Commission Released
Announcement of the National Economic and Trade Commission of the People's Republic of China
二No. 32, 2003
Published 3 Boiler and Pressure Vessel Industry Standards
The State Economic and Trade Commission approved 3 boiler and pressure vessel industry standards including "Pressure Vessels for Refrigeration Devices", which are now announced. Since 2003 Effective July 1, 2019. The above standards are published and distributed by the National Boiler and Pressure Vessel Standardization Technical Committee.
Attachment: 3 Boiler and Pressure Vessel Industry Standard Names and Numbers March 17, 2003
Attachment:
Serial Number
1||tt| |2
3
3 boiler and pressure vessel industry standard names and numbers standard names
pressure vessels for refrigeration units
spiral plate heat exchangers
Pressure vessel coating and transportation packaging
Standard number
JB/T4750—2003
JB/T4751-—2003
JB/T47112003
·Replacement Standard number
JB6917—1998
JB2536—1980
Since
JB/T4711—-2003 Pressure vessel coating and transportation packaging catalog
JB/ T4711-2003 "Pressure Vessel Coating and Transport Packaging" Standard Interpretation 11
Foreword
Scope
2 Normative Reference Documents
3 Coating
Transport Packaging
5
Iconic Mark
Item
Times
JB/T4711—2003
Foreword
This The standard replaces JB2536-1980 "Painting, Packaging and Transportation of Pressure Vessels". Compared with JB2536-1980, this standard mainly has the following changes: the name of the standard is changed to "Pressure Vessel Coating and Transportation Packaging"; the requirements for the surface quality of container products are improved, and the quality level of surface rust removal is specified; JB/T4711 —2003
-Added requirements for the application of anti-corrosion coatings, including the selection principles and quality of anti-corrosion coatings, confirmation and use of new coatings, and coating quality:
-Expanded the scope of application and included Containers made of steel, non-ferrous metals and alloys are specified, and corresponding regulations are made on the coating and transportation packaging of the latter;
improves and improves the packaging requirements for flange interfaces, bevels to be welded, and threads: - Added special requirements for transportation and packaging of containers made of stainless steel, non-ferrous metals and their alloys, and containers that need to be filled with inert gas protection;
-Added transportation and packaging requirements for documents. This standard was proposed by the National Boiler and Pressure Vessel Standardization Technical Committee. This standard was approved by the National Economic and Trade Commission. This standard is under the jurisdiction of the National Boiler and Pressure Vessel Standardization Technical Committee. This standard was drafted by Hefei General Machinery Research Institute and Sinopec Group Corporation Economic and Technological Research Institute. The main drafters of this standard: Wang Bing and Yang Guoyi. This standard is interpreted by the National Boiler and Pressure Vessel Standardization Technical Committee. 1 Scope
Pressure vessel coating and transportation packaging
This standard specifies the relevant requirements for coating and transportation packaging of pressure vessels and their parts. JB/T4711-—2003
The coating and transportation packaging of pressure vessels and their parts should not only comply with the provisions of this standard, but also comply with the technical requirements of the drawings. 2 Normative reference documents
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. Version. For undated referenced documents, the latest edition applies to this standard. GB146.11983 Standard gauge railway rolling stock limits GB146.2-1983 Standard gauge railway construction limits GB191-2000 Packaging, storage and transportation pictorial signs
GB/T197-1981 Ordinary thread tolerance and fit (1mm~355mm) GB/T8923-1988 Steel surface corrosion level and rust removal level 3 coating before coating
3.1, surface rust removal
3.1.1 For the outer surface of carbon steel and low alloy steel containers , the inner surface that can be derusted and other coating surfaces that need to be coated with anti-corrosion coatings should be cleaned and derusted. 3.1.2 Surface rust removal should be carried out by spraying, projecting or using manual and power tools. Damage to the surface of the container should be prevented during rust removal. Before rust removal, thick rust layers should be eradicated, and visible grease and dirt should be removed; after rust removal, floating dust and debris should be removed. 3.1.3 The surface of the steel after rust removal must at least meet the St2 or Sa2 requirements in GB/T8923-1988 to be qualified. 3.1.4 After rust removal, the residue inside the container should be cleaned up. 3.2 Application of anti-corrosion coating
3.2.1 The container manufacturing unit’s quality inspection department must pass all manufacturing quality inspections including surface rust removal before being allowed to apply anti-corrosion coating. The metal surface should be kept clean and dry before coating. Roughness and scratches on the surface should be removed by grinding and made smooth. Putty is not allowed.
3.2.2 The selection of anti-corrosion coating should be determined by the technical requirements of the drawing based on factors such as the nature and temperature of the medium in the container, environmental conditions, the role and cost of the container in the process, the performance and curing conditions of the coating. If there are no special requirements for the application of anti-corrosion coatings in the drawings, the outer surface of the container shell should be coated with at least two coats of alkyd primer, and the film thickness of the primer should not be less than 30 μm.
Under normal circumstances, the outer surface of the container shell should be coated with topcoat. The color of the topcoat should be light. If the drawing specifies otherwise, follow the drawing requirements. 5
JB/T4711—2003
The color of the topcoat of mobile pressure vessels should comply with the requirements of relevant standards. 3.2.3 The quality of anti-corrosion coatings should comply with the requirements of relevant national or industry standards, and should have a quality certificate. Anticorrosive coatings that have exceeded the effective storage period must be certified by an inspection unit recognized by the quality supervision department and issued with certification documents before they can be used.
New anti-corrosion coatings should undergo necessary tests first, and the test results can only be used after they are confirmed to be qualified by an inspection unit recognized by the quality supervision department.
3.2.4 Anti-corrosion coating should be applied immediately after surface rust removal, and the interval should generally not exceed 12 hours. If anti-corrosion coating cannot be applied immediately after surface rust removal, the rust-removed surface should be properly protected to prevent further rust or contamination. If rust or contamination is found, surface treatment should be performed again. The coating environment should be clean, dry and well-ventilated, and the ambient temperature should not be lower than the specified coating temperature of the paint. The applied anti-corrosion coating should be uniform and firm, and should not have defects such as bubbles, cracks, sagging, peeling, etc. Otherwise, it should be repaired. If necessary, special instruments can be used to detect the thickness and density of the coating. 3.2.5 Unless otherwise specified in the drawing, anti-corrosion coating may not be applied in the following situations: a) the inner surface of the container;
b) the internal parts shipped with the container as a whole;
c) stainless steel pressure Containers;
d) Pressure vessels made of non-ferrous metals and their alloys. 3.2.6 For the following grooves, no anti-corrosion coating should be applied within a range of about 100mm from the edge of the groove. If necessary, a protective film that is harmless to the welding quality and is easy to remove can be applied:
Segmented factory containers Cut surface groove;
a)
b) Peripheral groove of segmented parts;
c) Other welding grooves on the container shell that need to be assembled and welded on site. 3.3 Coating with protective film
Finished surfaces such as threads and sealing surfaces should be coated with an easily removable protective film. 4 Transport packaging
4.1 General requirements for transport packaging
4.1.1 Packaging should be based on the container's usage requirements, structural dimensions, weight, distance, and transportation method (railway, highway, waterway and aviation) Choose appropriate structures and methods for other characteristics. The packaging of the container should have sufficient strength to ensure that the container and its parts can be transported to the destination safely and reliably.
Containers and their parts that have strict requirements to prevent deformation, contamination, and damage during transportation, loading and unloading should be specially packaged.
4.1.2 The cross-sectional dimensions of containers transported by railway, regardless of the packaging form, should not exceed GB146.1 and the provisions of GB146.2. For transportation packaging of containers with over-sized dimensions, the relevant railway transportation department should be contacted in advance. Containers and their parts transported by road, waterway and air should contact the relevant transportation department in advance for the size, weight and packaging requirements of the single piece.
For containers that are oversized or overweight, the design, manufacturing, construction and installation and shipping units should jointly develop a transportation packaging plan when necessary. 6 | | tt | | JB/T4711-2003 | The division of segments and pieces should be indicated on the drawing technical requirements or the technical agreement between the supplier and the buyer based on the characteristics of the container and relevant transportation requirements. 4.1.4 The packaging of the flange interface should meet the following requirements: a) If there is a matching flange, the matching flange should be sandwiched between the matching flange and closed with a rubber or plastic cover plate. The thickness of the cover plate should not be less than 3mm;
b) If there is no matching flange, it should be closed with a metal, plastic or wooden blind plate that is the same as the outer diameter of the flange and is thick enough. If a metal blind plate is used, a rubber or plastic gasket should be sandwiched between the blind plates. , the thickness of the gasket should not be less than 3mm; c) The matching flange or blind plate should be fastened to the container flange interface with bolts. The number of fastening bolts should not be less than 4 and should be evenly distributed. 4.1.5 For pipes with grooves to be welded, a metal or plastic annular protective cover should be used to cover the end of the pipe, and the protective cover should be fixed in an appropriate manner. If the drawing allows, the metal cover can be spot welded on the outside of the pipe, but it should not be spot welded on the groove to be welded. 4.1.6 All threaded interfaces should be plugged with hexagonal head screw plugs and nuts, and the external threads can also be protected with plastic covers. 4.1.7 If nozzles, supporting members, lifting lugs or other similar accessories are changed or removed due to shipping space requirements, the manufacturer shall provide a loading diagram to show the location of the accessories that need to be relocated or removed, and obtain a written confirmation from the buyer. In this case, the manufacturer shall provide reassembly, assembly and welding procedures and inspection methods required for on-site welding of pipes. 4.2 Packaging form of container
4.2.1 Bare packaging
Large and extra large items that cannot be disassembled and have sufficient rigidity are supported by brackets at the bottom and tightened with tightening hoops to prevent Rolling and scurrying. bZxz.net
4.2.2 Frame
Use steel or square wood to make a strong frame to reliably fix the container or its parts in it. 4.2.3 Wrapping
For parts that are not easy to be damaged and lost during transportation and loading and unloading, and have larger specifications and smaller quantities, they can be packed with soft materials and then firmly tied with iron wire or flat steel.
4.2.4 Camera Obscura
The camera obscura is a sealed packaging box, used for packaging small parts with high precision, easy to be damaged, afraid of moisture, anti-corrosion and easy to be lost. 4.2.5 Blank box
Use this type of packaging for parts and components that do not need a dark box and are not suitable for wrapping. If necessary, the box can be lined with oil felt. 4.3 Transport packaging of whole or segmented containers 4.3.1 - General requirements
Integrated or segmented containers should generally be packed naked. 4.3.2 Transport packaging of the overall factory container
4.3.2.1 Various residues in the container should be removed before shipment. 4.3.2.2 The manufacturing unit should design the packaging based on the specific conditions of the container and transportation. The following requirements should be considered during the design: a) Containers that are small in size and weigh no more than 1t should be fixed on the transport vehicle or ship with skids; b ) Larger containers weighing more than 1t should be supported by brackets, and tightening hoops should be used to fasten the containers to the brackets. Flexible materials should be padded between the tightening hoops and the container, and the brackets should be firmly fixed on the brackets. On board a delivery vehicle or ship. Containers weighing 1 to 10t can use wooden brackets; containers weighing more than 10t or having a nominal diameter greater than 3000mm should use steel brackets;
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.