1 Subject Content and Application Scope
This standard specifies specifications for portal scraper.
This standard is applicable to portal scraper used in bulk warehouse that stories various granular materials, e.g. urea, compound fertilizer, fine coal, ore sand and cereal, where the working environment temperature is -20~70℃. If the portal scraper is beyond the above scope, orders shall be made upon the agreement of the supplier and the purchaser.
This standard is not applicable to flammable and combustible working environment.
2 Normative References
GB 699 Quality Carbon Structural Steels
GB 700 Carbon Structural Steels
GB 1300 Steel Wires for Welding
GB 1591 Low Alloy Structural Steels
GB 1182~1184 Geometrical Tolerancing
GB 1801~1804 Limits and Fits
GB 2106 Metallic Materials - Charpy Notch Impact Test
GB 3323 Radiographic Examination of Fusion Welded Joints in Metallic Materials
GB 4942.2 Degrees of Protection Provided by Enclosures for Low-voltage Apparatus
GB 5117 Carbon Steel Covered Electrodes
GB 5293 Carbon Steel Submerged-arc Welding Flux
GB 5676 Cast Carbon Steels for General Engineering Purposes
GB 7251 Low-voltage Switchgear Assembly
GB 7324 General Purpose Lithium Lubricating Grease
JB 179 Accuracy of Involute Cylindrical Gears
JB 180 Bevel Gear Drive Tolerance
JB 1152 Ultrasonic Flaw Detection of Butt Welds in Boilers and Steel Pressure Vessels
JB 1614 Boiler Pressure Parts - Mechanical Test for Welded Joints
JB 2759 General Specifications for Packing of Mechanical and Electrical Product
JB 3964 Welding Procedure Qualification for Pressure Vessels
YB 3210 General Specifications for Alloy Steel Castings
3 Specification and Marking
