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Corbec news on hot-dip galvanizing of steel
The most significant difference here is with g1664 to the minimum coating thickness required by the A for pipes and tubes and for flats and bars. New information and research are constantly taken into account when updates are made to ASTM A; the last update was in However, there are some competing specifications that get attention when an end user asks h164 galvanizer to use them. Both specifications require that the exposed area be less than an inch in its narrowest dimension.
The most notable difference here is in regard to the minimum coating thickness required by A for g1664 and tubing as well as for strip and bar. Again, these two specifications are similar, but have major differences; particularly with regard to the listed coating properties.
Is CSA G still a valid specification? Despite this, the G includes these materials with all other materials and requires inaccessible thicknesses for flats, bars, pipes, and tubes. ASTM A also holds a few more requirements regarding the finish of the coating. However, the information presented here can adequately describe some of the key differences between the two. Cxa 1 of ASTM A has requirements for structural shapes, strip and bar, plate, pipe and tubing, wire, and reinforcing bar.
This standard has lost its relevance in the market and is rarely used. Anyone making use of this information assumes all liability arising from such use. The practice behind each method varies from cssa specification to the other, but the most notable differences are the feeler gauge, magnetic and electronic measurements.
Both standards also cite that Ccsa B6 is a standard that specifies that the zinc used in the galvanizing bath must be compliant. Lets examine some important differences between the two specifications, and then summarize with a comparison table. Again, these two specifications are similar, but have some very important differences; especially in regards to the specified coating properties. January 29, Authored by Daniel Barlow.
The higher purity required by G creates the difference in the two specifications. This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. But due to financial considerations, CSA G has not been updated since and there seem to be no plans to do so. The framework of these two specifications, and therefore their goal, is almost identical. Each specification standardizes the coating thicknessfinish, appearance, and adherence of a hot-dip galvanized coating.
Perhaps the most obvious and important caa between these standards is how relevant each one is in todays market. However, G gives its own procedures for testing for embrittlement of the base coating while A references a complete guide of ASTM A which details a bend test.
Both tables are shown below to compare the minimum coating thicknesses cas by each. Total average equal to the requirement for the minimum coating thickness with the thicknesses of all samples greater than a coating grade less than in Table 1.
Is the CSA G standard always a valid specification? Both specifications ask for the use of a stout knife test to determine proper adherence of the coating. But G has its own test procedures for the weakening of the base layer, A refers to the most complete guide of the ASTM A standard, which gives the details of a bending test. The cwa procedure set up in G to test the coating thickness has very general guidelines.
ASTM A also declares, in addition to the 0. However, due to financial considerations, CSA G has not been updated since and there appears to be no intention to do so.
CSA CAN/CSA-G164-M92 – Hot Dip Galvanizing of Irregularly Shaped Articles
Despite this, G lumps this material in with all other materials and requires unattainable thicknesses for strip, bar, pipe, and tubing.
While this standard is similar to ASTM A in scope and purpose, there are many differences between the two. Both specifications also contain a slight difference with respect to the repair of uncoated areas during the galvanizing process.
However, t164 information presented here may adequately describe some of the major differences between the two.
The information provided herein is not intended as a representation or warranty on the part of the AGA. The first major difference between the two specifications comes when section 3. Table 1 of ASTM A has requirements for structural forms, strips and bars, plates, pipes and tubes, wires and rebar.
The practice behind each ca of these methods varies from one specification to the next, g16 the most notable differences are that of the magnetic and electronic thickness gauge measurements. It is considered the standard of the hot-dip galvanizing industry in North America. The scope of these two specifications, and therefore their intended f164, are sca identical. The two specifications also contain a minor difference regarding the renovation of areas left uncoated during the galvanizing process.
For example, each specification uses a table to describe the standards for minimum coating thickness of galvanized steel, but the minimum requirements and the materials listed are very different. For, example, each specification uses a table to describe minimum coating thickness standards on galvanized steel, but the g14 requirements and materials listed are quite different.
It is considered the standard of the hot-dip galvanizing industry in North America. Some slightly different language exists between the two regarding piping and continuous galvanizing, but when read carefully, the same information is being stated g14 the scope of each specification.
Each specification makes the coating thickness, finish, appearance and adherence of a hot-dip galvanized coating uniform. Few requirements are given by G concerning the appearance of the zinc coating.
Also, A does not give requirements for the minimum coating thickness on fasteners and threaded articles but references ASTM A for these requirements. Both standards also cite ASTM B6 as a standard to which the zinc used in the galvanizing bath must conform.
Few conditions are given by G regarding the appearance of the zinc coating. ASTM A has a more realistic expectation that the coating be free of v164 areas, bubbles, flux deposits, and matte.