In order that the electrodes from different manufacturers may be identified as certain types, a code for classification of electrodes was prepared BS 1719.
The code is made up as follows:
Prefix Letter
Denotes the method of manufacture.
E - Solid Extrusion
R - Extruded with Re-inforcing
D - Dipped
If more than one method used the coding is according to the predominant method.
Type of Flux Covering: 1st Digit
This digit, the 'hundreds' digit, indicates the type of coating and therefore gives some idea of the operating characteristics.
1 High cellulose content
2 High titanium dioxide (titania) producing a fairly viscous slag
3 An appreciable amount of titanium dioxide producing a fluid slag
4 High iron or manganese silicate oxide content producing an inflated slag
5 High iron or manganese silicate oxide content producing a heavy solid slag
6 Based on calcium carbonate and fluoride
9 A covering not based on any of the above
Welding Position: 2nd Digit
This digit, the 'tens' digit, indicates the welding position for which the electrode is suitable.
0 - F, H, V, D, O
1 - F, H, V, O
2 - F, H
3 - F
4 - F, H (Fillet Weld Only)
9 - Not classified above.
When the electrode is coded as suitable for vertical and overhead positions, it should be understood that sizes larger than 6 S.W.G. (or 8 S.W.G. for iron power electrodes) are not normally used for welding in these positions.
Welding Current and Voltage Conditions: 3rd Digit
This digit, the 'units' digit, indicated the recommended operating characteristics.
Digit Welding Current And Voltage Conditions
0 - D+
1 - D + a90
2 - D - A70
3 - D + A50
4 - D ± A70
5 - D ± A90
6 - D ± A70
7 - D ± A50
9 - Not classified above
Special Characteristics: Suffixes
In the coding of an electrode with special characteristics a suffix letter, as defined below, is used.
P - Deep penetration electrodes as specified in BS 5639 'Covered Electrodes for the Metal Arc Welding of Mild Steel'
H - Hydrogen - controlled electrodes
J - Iron power electrodes with a metal recovery of 110 to 130% of the core wire weight
K - Iron powder electrodes with a metal recovery of more than 130% of the core wire weight.
Related Terms |
CLASSIFICATION RATING
The designation provided in a classification by which a class rate is determined.
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CLASSIFICATION
A publication, such as Uniform Freight Classification (railroad) or the National Motor Freight classification (motor carrier), that assigns ratings to various articles and provides bill of lading descriptions and rules.
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HUMPING
The process of connecting a moving rail car with a motionless rail car within a rail classification yard in order to make up a train. The cars move by gravity from an incline or 'hump' onto the appropriate track.
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GDSM
Abbreviation for 'General Department Store Merchandise.' A classification of commodities that includes goods generally shipped by massmerchandise companies. This commodity structure occurs only in service contracts.
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HS
Harmonized System of Codes - an international goods classification system for describing cargo in international trade under a single commoditycoding scheme. Developed under the auspices of the Customs Cooperations Council (CCC), an international Customs organization in Brussels, this code is a hierarchically structured product nomenclature containing approximately 5,000 headings and subheadings. It is organized into 99 chapters arranged in 22 sections. Sections encompass an industry (e.g., Section XI, Textiles and Textile Articles); chapters encompass the various materials and products of the industry (e.g., Chapter 50, Silk; Chapter 55, Manmade Staple Fibers; Chapter 57, Carpets). The basic code contains fourdigit headings and sixdigit subheadings. Many countries add digits for Customs tariff and statistical purposes. In the United States, duty rates will be the eightdigit level; statistical suf xes will be at the tendigit level. The Harmonized System (HS) is the current U.S. tariff schedule (TSUSA) for imports and is the basis for the tendigit Schedule B export code.
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NK
Nippon Kaiji Kyokai - a Japanese classification society which certifies seagoing vessels for compliance to standardized rules regarding construction and maintenance.
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SIC
Standard Industrial classification - a standard numerical code used by the U.S. Government to classify products and services.
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SITC
Standard International Trade classification - a standard numeric code developed by the United Nations to classify commodities used in international trade, based on a hierarchy.
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SCHEDULE B
The Statistical classification of Domestic and Foreign Commodities Exported from the United States.
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CERTIFICATE OF CLASSIFICATION
A certificate, issued by the classification society and stating the class under which a vessel is registered.
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