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Both specifications require the use of b164 knife test to determine proper coating adherence. Each specification standardizes the coating thicknessfinish, appearance, and adherence of a hot-dip galvanized coating. The sampling procedure set up in G to test the coating thickness has very general guidelines. 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 does not give requirements for the minimum coating thickness on fasteners and threaded g1644 but references ASTM A for these requirements. ASTM G1664 has a more realistic expectation that the coating be free of uncoated areas, bubbles, flux deposits, and matte.
The two specifications also contain a minor difference regarding the renovation of areas left uncoated during the galvanizing process. ASTM A also holds a few more requirements regarding the finish of the coating. The scope of these two specifications, and therefore their intended purpose, are nearly identical.
Standards – Locweld
This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability.
Also, A has no requirements as to the minimum coating thickness on threaded fasteners and items, but refers to ASTM A for these requirements. It has lost relevancy in the market and is seldom used. 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.
ASTM A is listed as the standard for renovation by each specification. Despite this, the G includes these materials with all other materials and requires inaccessible thicknesses for flats, bars, pipes, and tubes.
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. Few conditions are given by G regarding the appearance of the zinc coating.
Differences Between ASTM A123 and CSA G164
Few requirements are given by G14 concerning the 1g64 of the zinc coating. 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 in the scope of each specification.
The main difference csq is the refusal to accept the presence of matte particles adhering to the coating, according to G However, the information presented here can adequately describe some of the key differences between csz two. ASTM A also declares, in addition to the 0. The most notable difference here is dsa regard to the minimum coating thickness required by A for pipe and tubing as well as for strip and bar. Despite this, G lumps this material in with all other materials and requires unattainable thicknesses for strip, bar, pipe, and tubing.
Most galvanizers located in North America use this specification as the standard for coating thickness, appearance, finish and adherence. But due to financial considerations, CSA G has not been updated since and there seem to be no plans to do so. The practice behind each method varies from one specification to the other, but the most notable differences are the feeler gauge, magnetic and electronic measurements. Perhaps the most obvious and important difference between these standards is how relevant each one is in todays market.
Both tables are shown below to compare the minimum coating thicknesses specified by each one. This leads to less confusion during cda galvanizing process and creates a complete specification. The standard requires that the coating be free of imperfections such as bubbles, rough or uncoated areas, acid, black spots, or slag cda adhering to the coating Both standards also cite ASTM B6 as a standard to which the zinc used in the galvanizing bath must conform.
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.
Standards Council of Canada
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 specifications also require that the exposed area cover less than 0.
January 29, Authored by Daniel Barlow. The information provided f164 is not intended as a representation or warranty on the part of the AGA. The most significant difference here is with regard to the minimum coating thickness required by the A for pipes and tubes and for flats and bars. The higher purity required by G is the difference between the two specifications.
Both specifications also require the bare spot to be less than 0. Anyone making use of this information assumes all liability arising from such use. Each g1164 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. Is the CSA G standard always a valid specification?
While this standard is similar to ASTM A in scope and purpose, there are many differences between the two.
Table 1 of ASTM A has requirements for structural forms, strips and bars, plates, pipes and tubes, wires and rebar. New information and research are constantly being considered when updates are made to ASTM B164 the last such update occurring in It is cda the standard of the hot-dip galvanizing industry in North America.
Each specification makes the coating thickness, finish, appearance and adherence of a hot-dip galvanized coating uniform. The procedure includes the option to choose the number of samples depending on the number csq parts in the lot and the length and size of cxa parts. Some differences exist between the two with regard to piping and continuous galvanizing, but after examination, the same information is indicated within each specification.
Corbec news on hot-dip galvanizing of steel
However, there are some competing specifications that get attention when an end user asks a galvanizer to use them. A, on the other hand, only requires the average coating thickness measurement meet the minimum coating thickness required by Table 1, with the average of one specimen being one coating grade below that required in Table 1. This standard has lost its relevance in the v164 and is rarely used.
Both specifications ask for the use of a stout knife test to determine proper adherence of the coating. Total average equal to the requirement for the minimum b164 thickness with the thicknesses of all samples greater than a coating grade less than in Table 1. Both tables are shown below to compare the minimum coating thicknesses specified by each.