ASTM A53: Standard Specification for pipe, steels, black and hot-dipped, Zinc-Coated, Welded, and Seamless. ASTM A53 steel pipe covers seamless and welded black and hot-dipped galvanized steel pipe in DN6-DN650, ASTM A53 carbon steel pipe may be furnished in type F, Type E and Type S. grades including grade A and grade B, Now, ASTM A53 Gr. B welded pipe in stocks a full range of NPS ¼" to 30" diameter and Schedules 10 through 160, STD, XH, and XXH.
Galvanized steel pipe/tube is an alloy of iron and carbon. It is rolled into a tube - usually round, square or rectangular - and then coated with zinc. Steels pipes are usually galvanized in one of two ways. It can be hot-dip galvanized, a thick protective coating can be formed by molten zinc, or a thinner layer of zinc can be attached to the steel by electroplating through the current zinc solution.Galvanizing can increase the corrosion resistance of the steel pipes and prolong the service life.
Welded steel pipe with hot-dip or electro galvanized coating on the surface of galvanized steels pipes. Galvanizing can increase the corrosion resistance of steels pipes and prolong their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for water transmission, gas, oil and other general low-pressure fluids, they are also used as oil well pipes and oil transmission pipes in the petroleum industry, especially in offshore oil fields, pipes for oil heaters, condensing coolers and coal distillation oil washing exchangers of chemical coking equipment, trestle pipe piles and support frames of mine tunnels.
Galvanized Round Tube

| Key words |
Hot dipped galvanized steel pipe |
| Packing | Standard and export packing |
| Delivery time | About 15 days |
| Thickness | 1.2-20mm |
| Material | Q195,Q235,Q345,16Mn |
| Specification | 1/2"-10'' |
| Color | Silver |
| MOQ | 1 ton |
Mechanical properties:
| Standard | Grade | Tensile strength(MPa) | Yield strength (MPa) |
| ASTM A53 | A | ≥330 | ≥205 |
| ASTM A53 | B | ≥415 | ≥240 |
Chemical requirements:
| Element | Type S | |
| (seamless) | ||
| Grade A | Grade B | |
| Carbon max. % | 0.25 | 0.3 |
| Manganese % | 0.95 | 1.2 |
| Phosphorous, max. % | 0.05 | 0.05 |
| Sulfur, max. % | 0.045 | 0.045 |
| Copper, max.% | 0.4 | 0.4 |
| Nickel, max. % | 0.4 | 0.4 |
| Chromium, max. % | 0.4 | 0.4 |
| Molybdenum, max. % | 0.15 | 0.15 |
| Vanadium, max. % | 0.08 | 0.08 |
Measurement Picture

galvanized steel tube application
Galvanized steels pipes have a wide range of uses. In addition to being used as pipelines for low-pressure fluids such as water, gas, and oil, it is also used in the petroleum industry, especially oil well pipelines, oil pipes and petroleum heaters in offshore oil fields, and used in chemical coking equipment. Condensation cooler, coal distillation wash oil exchanger pipeline, as well as mine pipe piles, mine tunnel support frame pipelines,Urban/civilian construction pipes, mechanical structure pipes, agricultural equipment pipes, water and gas pipes, greenhouse pipes, scaffolding pipes, building materials pipes, furniture pipes, low pressure fluid pipes, oil pipes, etc. Also, galvanized steel pipes are widely used in construction, machinery, coal mining, chemical industry, electric power, railway vehicles, automobile industry, roads, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, exploration machinery, greenhouse construction and other manufacturing industries.
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