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New information and research are constantly taken into account when updates are made to ASTM A; the last update was in Is the CSA G standard always a valid specification? The higher purity required by G creates the difference in the two specifications.
Standards Council of Canada
However, there are some competing specifications that are worthy of consideration when an g1164 user requests that the galvanizer use them. However, the information presented here may adequately describe some of the major differences between the two.
The standard requires that the coating be free of imperfections such as bubbles, rough or uncoated areas, acid, black spots, or slag particles adhering to the coating Again, these two specifications are similar, but have major differences; particularly with regard to the listed coating properties.
For, example, each specification uses a table to describe minimum coating thickness standards on galvanized steel, but the minimum requirements and materials listed are quite different.
The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. Also, A does not give requirements for the minimum coating thickness on fasteners and threaded articles but references ASTM A for these requirements.
However, there are some competing specifications that get attention when an end user asks a galvanizer to use them. But due to financial considerations, CSA G has not been updated since and there seem to be no plans to do so. It is considered the standard of the hot-dip galvanizing industry in North America. It is important to be aware of these differences in the case where a manufacturer or prescriber requests information on CSA G Most galvanizers located in North America use this specification as the standard for coating thickness, appearance, finish and adherence.
The first major difference between the two specifications comes when section 3. 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.
Differences Between ASTM A123 and CSA G164
Both specifications require the use of a knife test to determine proper coating adherence. On the other hand, the A only requires that the average measurement of the thickness of the coating meet the minimum coating thickness required by Table 1, with the sample average having a coating less than that required in Table 1.
The first major difference between the two specifications is where Article 3. January 29, Authored by Daniel Barlow.
ASTM A is listed as the standard for renovation by each specification. The higher purity required by G is the difference between the two specifications. Both specifications ask for the use of a stout knife test to determine proper adherence of the coating. This leads to less confusion during the galvanizing process and creates a complete specification. ASTM A also declares, in addition to the 0. Both specifications also contain a slight difference with respect to the repair of uncoated areas during the galvanizing process.
The main difference here is the refusal to accept the presence of matte particles adhering to the coating, according to G It has lost relevancy in the market and is seldom used.
Table 1 of ASTM A has requirements for structural forms, strips and bars, plates, pipes and tubes, wires and rebar.
CAN/CSA-GM92 (R) | Standards Council of Canada – Conseil canadien des normes
Both tables are shown below to compare the minimum coating thicknesses specified by each. Each standard lists the same tests used to determine the coating thickness on galvanized steel; electronic or magnetic gauge, weigh galvanize weigh, weigh strip weigh or microscopy methods.
ASTM A also holds a few more requirements regarding the finish of the coating. The CSA G classifications are more general and include; cast, rolled, stretched, pressed and forged steel; screws, bolts, nuts, rivets, nails and similar fasteners. 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.
Few conditions are given by G regarding the appearance of the zinc coating.
The scope of these two specifications, and therefore their intended purpose, are nearly identical. It is considered the standard of the hot-dip galvanizing industry in North America.
The practice behind each one of these methods varies from one specification to the next, but the most notable differences are that of the magnetic and electronic thickness gauge measurements. Also, A has no requirements as to the minimum f164 thickness on threaded fasteners and items, but refers to ASTM A for these requirements.
The framework of these two specifications, and therefore their goal, is almost identical. The percentage by weight and the percentage by mass differ only in verbiage and describe the same amount.