This standard refers to seamless and welded black and hot dipped galvanized steel pipe. The steel categorized in this standard must be open-hearth, basic-oxygen or electric-furnace processed and must have the following chemical requirements: carbon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum, and vanadium. The tubing shall undergo a seamless or welding process. Tension, be...

There is a complete set of production line for pre-galvanized square hollow section and rectangular hollow section. We use pre galvanized steel strips for raw materials, through a variety of processing technology, such as flattening, shearing and butt welding, circle shearing, loop shoring, roll forming, ctttingand so on.

● Pre - galvanized pipe : pre-galvanized pipe is made of hot dipped galvanized steel strip directly ,zinc coating : 80 – 120g/m2

TianJin Huayuhongye Steel Co.,Ltd. ,located in Daqiuzhuang Industrial Area,Tianjin,China, is one of the most famous enterprise of steel pipe in China. Huayuhongye set up several production bases in Tianjin & Hebei Province, manufacturing ERW Steel Pipe, SSAW Steel Pipe, LSAW Steel Pipe, SMLS Steel Pipe, Scaffolding system and couplers.The main product: SSAW API 5L Line Pipe,3PE Coated API Pipe,Gas...

The zinc serves as a sacrificial layer. It will rust before the metal beneath it, keeping the integrity of the pipe intact for much longer than regular pipes. Furthermore, even if the zinc layer is scratched or damaged, it will still protect the metal beneath it.

Prices vary depending on your galvanized pipe supplier and the scope of your project. However, galvanized pipes are often more cost-effective that paint projects, particularly when you consider longevity and the need to often re-touch paint jobs.

Our company specializes in manufacturing of steel pipes for structures, electric power transmission project, pipeline of fluid use like water, oil and gas, piling, mechanical industry and municipal project. It has close relationships with many large steel corporations. So it supplies complete steel products according to customers’ requirements.We are one of the well recognized manufacturers and su...

Galvanized steel pipe is molten metal and reacting the iron matrix alloy layer, so that the substrate and coating combination of both.Galvanized steel pipe into cold galvanized steel, hot dip galvanized steel pipe, cold galvanized steel pipe has been disabled, which is also able to use a temporary state advocates. Sixties and seventies, the international developed countries began to develop new pi...

Hot galvanized pipe is molten metal and reacting the iron matrix alloy layer. So that the substrate and coating combination of both. Hot-dip galvanizing is the first steel pickling. In order to remove iron pipe surface. After pickled, ammonium chloride or zinc chloride aqueous solution of ammonium chloride and zinc chloride mixed aqueous solution tank or cleaning. And then into the hot dip tank. H...

Hot-dip galvanized (galvanizing), also known as hot-dip galvanized, it is an effective anti-corrosion of the metal, mainly used in various sectors of the metal structure facilities. The rust steel immersed in liquid zinc melt around 500 ℃, steel members attached to the surface of the zinc layer, which play the purpose of anti-corrosion. Hot-dip galvanizing process: finished of Pickling - washing -...

The zinc serves as a sacrificial layer. It will rust before the metal beneath it, keeping the integrity of the pipe intact for much longer than regular pipes. Furthermore, even if the zinc layer is scratched or damaged, it will still protect the metal beneath it.

Advantages of welded pipeWelded pipes are typically more cost effective than their seamless equivalents.Welded pipes are usually more readily available than seamless. The longer lead time required for seamless pipes can not only make timing problematic, but it also allows more time for the price of the materials to fluctuate.The wall thickness of welded pipes is generally more consistent than that...

API is short for the American Petroleum Institute, API certification sub-system API monogram certification and product certification.API5L authentication refers to the API monogram certification following certification:API Spec 5L line pipeAPI Spec 5LC CRA pipeline corrosion resistant alloy tubeAPI Spec 5LCP continuous pipelineAPI Spec 5LD corrosion-resistant steel alloy outer cover or liner

Galvanized steel pipe is better. Wear flat galvanized steel pipe plant Zhuang Teng hold off coupons platinum sly fire pipeline is used more widely. Coated steel pipe galvanized steel pipe is a new fire after. Now the national standard GB / T5135.20-2010 sprinkler systems Part 20: coated steel pipe. Also made clear that the fire should be used in coated steel. National standards set forth in the fi...

The thicker your zinc coating, the longer your pipe will last. The environment also plays a role in determining your pipe’s life span. If your pipes will be placed in highly corrosive conditions, they’ll often last 50 to 100 years.

Pregalvanized steel is zinc coated by a hot dip process. Steel strip from a coil is fed through a continuous zinc coater which cleans, fluxes and coats the steel with molten zinc. After cooling, the steel is recoiled. The pregalvanized zinc coating conforms to a G-90 thickness designation per ASTM A653.

Of course, we accept trade assurance.

Sample free, but the buyer pays for the freight.

In produce: hot dip galvanized steel pipe is made from black steel pipe and then do zinc coating. pre galvanized steel pipe made from pre galvanized steel strip.In zinc weight: hot dip galvanized 200-300g/m2 pre galvanized 30-150g/m2

HYHY STEEL, depending on location, holds a Certification to either ISO 9001:2008 or ISO 9001:2008. The scope of our certification pertains to the “Stockholding, Distribution, Inventory Management and Processing of Metal Mill Products.”

Tianjin Huayuhongye Steel Co.,Ltd. specializes in Customized Supply Chain solutions. Contact our sales to learn more.

Tianjin Huayuhongye Steel Co.,Ltd. has the capability of cutting several sizes and grades of material to customer supplied lengths. Please check with our sales contact for more information.

MMQ/ MOQ are Mill Minimum Quantity or Min Order Qty. This is the minimum order that you can buy from the mill for a non-standard item. Usually referred to as min/increments.

There is no such thing as cold galvanizing. The term is often used in reference to painting with zinc-rich paint. Galvanizing by definition means a metallurgical reaction between zinc and iron to create a bond between the zinc and the steel of approximately 3600 psi. There is no such reaction when zinc-rich paints are applied and the bond strength is only several hundred psi.

The process steps are similar but the production equipment is very different. After fabrication galvanizing is a more manual process where structural steel (fabricated plate, wide-flange beams, angles, channels, tube, pipe, fasteners) is suspended by wire, chain or hook from crane hoists and immersed in the cleaning solutions and zinc. Continuous sheet galvanizing involves uncoiling sheet, passing...

There are no known studies to suggest zinc corrosion products cause any harm to the environment. Zinc is a naturally occurring element (25th most abundant element in the earth), and necessary for all organisms to live. It is a recommended part of our diet (RDA 15 mg) and necessary for reproduction. It is used in baby ointments, vitamins, surgical instruments, sunscreens and cold lozenges.

The primary reason for vent holes is to allow otherwise trapped air and gases to escape; the primary reason for drain holes is to allow cleaning solutions and molten zinc metal to flow entirely into, over, and throughout the part, and then back into the tank or kettle.

When galvanized parts are used for slip-critical connections, they must either be brushed, abrasive blasted, or painted with zinc-silicate paint to increase the surface roughness and, thus, the slip factor.

Coating thickness depends on the thickness, roughness, chemistry, and design of the steel being galvanized. Any or all of these factors could produce galvanized coatings of non-uniform thickness. Members of the American Galvanizers Association galvanize to ASTM standards, which define minimum average coating thickness grades for various material categories.

The galvanized coating appearance may either be bright and shiny resulting from the presence of an outer layer of pure zinc, or duller, matte gray as the result of the coating’s intermetallic layers being exposed. Performance is not affected. Coating appearance depends on the amount of zinc in the coating.

Numerous different fabrications for a variety of applications are galvanized each year. To view a list of the different types of products that have been hot-dip galvanized click here.

Hot-dip fasteners generally have about 10 times as much zinc on the surface and are suitable for use in all exterior and interior applications. Zinc-plated fasteners will provide a disappointing performance if used outside, especially when used to connect hot-dip galvanized structural steel members.

Constant exposure to temperatures below 390 F (200 C) is a perfectly acceptable environment for hot-dip galvanized steel. Good performance can also be obtained when hot-dip galvanized steel is exposed to temperatures above 390 F (200 C) on an intermittent basis.

The steel chemistry is the primary determinant of galvanized coating thickness and appearance. Continuously cast steel produced by the steel companies has a wide variety of chemistries, thus the different coating appearances. There are several different additives galvanizers may put in their zinc kettle to enhance the coating appearance by making it shiny, spangled or matte gray. The appearance of...

Zinc on newly galvanized steel is very reactive and wants to form zinc oxide and zinc hydroxide corrosion products that eventually become the stable zinc carbonate. When galvanized steel is tightly stacked or stored in wet boxes that don’t allow for free flowing air, the zinc forms excessive layers of zinc hydroxide, otherwise known as wet storage stain. Most wet storage stain can be easily remove...

The three intermetallic layers that form during the galvanizing process are all harder than the substrate steel and have excellent abrasion resistance.

Hot-dip galvanized steel resists corrosion in numerous environments extremely well. It is not uncommon for galvanized steel to last more than 70 years under certain conditions.

When compared with paint systems, hot-dip galvanizing after fabrication has comparable initial application costs and, almost always, lower life-cycle costs. In fact, the lower life-cycle costs of a hot-dip galvanized project make galvanizing the smart choice for today and tomorrow.

There are four steps:Pre-inspection – where the fabricated structural steel is viewed to ensure it has, if necessary, the proper venting and draining holes, bracing, and overall design characteristics necessary to yield a quality galvanized coatingCleaning – steel is immersed in a caustic solution to remove organic material such as grease and dirt, followed by dipping in an acid bath (hydrochloric...

Zinc metal used in the galvanizing process provides an impervious barrier between the steel substrate and corrosive elements in the atmosphere. It does not allow moisture and corrosive chlorides and sulfides to attack the steel. Zinc is more importantly anodic to steel – meaning it will corrode before the steel, until the zinc is entirely consumed.