Galvanized Pipe- Galvanized Steel Piping Sizes Chart,Dimensions
The galvanized pipes supplied by TUSPIPE are produced through two processes: hot-dip galvanizing and pre-galvanizing. Different outer diameters, like: 1-1/2 galvanized pipe, 2 galvanized steel pipe, 2 1 2 galvanized pipeThese pipes exhibit high corrosion resistance, enabling your projects to achieve an extended service life while delivering optimal performance at the most economical cost.
Tubo galvanizado
- Hot-dip galvanized is the process of placing pre-treated pipe into molten zinc at around 450°C to form a strong galvanizing layer outside the pipe. Under normal circumstances, hot-dip galvanizing is considered to have a longer service life.
- Pre-galvanized is the steel through the cold rolling machine processing, the use of electrochemical method galvanized, and then the pre-galvanized steel coil, welding, molding, reprocessing, galvanized steel pipe.
Why Use Galvanized Pipe？what is galvanized pipe?
Without pipe galvanized, corrosion is a persistent danger to metal; therefore, it must be protected. It is possible to create oxidation in metal when corrosive elements such as salt, dirt, moisture, or chemicals come into contact with the iron in the metal. Rust is formed as a consequence of the reaction. Because of the corrosion of metal, pipes are at risk of collapsing or exploding.
Adding a coating of zinc to metal during the pipe galvanized process serves to protect it against corrosion. This zinc reinforcement provides two types of protection for metals:
- It acts as a protective barrier between the sensitive iron and the corrosive elements.
- Galvanic corrosion is prevented by using this product. When compared to the majority of metals, zinc exhibits significantly anodic characteristics. When it comes into touch with a more noble metal, it acts as an anode, releasing electrons very immediately. When a noble metal would otherwise be taking electrons from carbon steel or another basic metal, this sacrifice comes in useful.
Galvanized Pipe process
1. Pre-treatment stage
Inspection of raw materials: to ensure that the surface of the pipe is free of cracks and depressions, and that the dimensions are in accordance with standards
Degreasing and cleaning: Use alkali solution to remove oil and impurities on the surface of the pipe to ensure the adhesion of the galvanized layer.
Acid washing: Remove the oxides on the pipe surface by hydrochloric acid or sulfuric acid.
Rinsing and auxiliary plating agent: use water to get rid of the acidic substances on the surface first, and then put the pipes into ammonium chloride or zinc chloride solution to enhance the bonding between zinc solution and steel pipes.
Drying: hot air drying (temperature 80~150℃), to avoid moisture into the zinc solution to cause zinc explosion.
2. Galvanizing (hot dip galvanizing)
Temperature control – immersing the steel pipe into the zinc solution for 1-5 minutes – removing excess zinc through internal and external blowing – natural cooling.
3. Post-processing
Passivation: Passivation using chromate or phosphate solution to form a dense oxide film to improve corrosion resistance.
Quality Inspection: Ensure that the surface of galvanized pipe is free of air bubbles and burrs, ensure the thickness of the galvanized layer as well as carry out bending test.
Types of Galvanized PipING
Hot dip galvanized is an efficient method of surface treatment protection. It has excellent corrosion resistance and is easy to cut and process. Can meet a variety of complex engineering design and needs. At the same time, it has high cost efficiency and is conducive to large-scale production and use. Because of its unique properties, it is widely used in the pipeline transportation of water, natural gas and other fluids.
The manufacturing process of pre-galvanized pipe is very delicate. Including steel coil preparation, galvanized treatment, forming into a number of steps. The pipe with this surface treatment method is aesthetically pleasing, smooth and uniform, and cost-effective. Pre-galvanized pipe is widely used in construction engineering, transportation and industrial equipment and other fields. However, because the inside of the pipe can not be coated with zinc layer, there is still rust.
Galvanized Pipe Dimensions SIZES CHART(OD CHART)
This section will show you the different outer diameters of the pipes manufactured by TUSPIPE, including:1 1/4 galvanized pipe, 1-1/2 galvanized pipe, 2 galvanized steel pipe, 2 1 2 galvanized pipe, 3 galvanized pipe, 4 inch galvanized pipe, 6 galvanized pipe, 10 ft galvanized pipe. Galvanized pipe od chart.
| DN | D.O. | W.T. | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Polegadas | mm | SCH5S | SCH10S | SCH10 | SCH20 | SCH30 | SCH40 | SCH60 | SCH80 | SCH100 | SCH120 | SCH140 | SCH160 | Sth | XS | XXS | |
| 50 | 2″ | 60.3 | 1.65 | 2.77 | - | - | - | 3.91 | - | 5.54 | - | - | - | 8.74 | 3.91 | 5.54 | 11.07 |
| 65 | 2 1/2″ | 73 | 2.11 | 3.05 | - | - | - | 5.16 | - | 7.01 | - | - | - | 9.53 | 5.16 | 7.01 | 14.02 |
| 80 | 3″ | 88.9 | 2.11 | 3.05 | - | - | - | 5.49 | - | 7.62 | - | - | - | 11.13 | 5.49 | 7.52 | 15.24 |
| 90 | 3 1/2″ | 101.6 | 2.11 | 3.05 | - | - | - | 5.74 | - | 8.08 | - | - | - | - | 5.74 | 8.08 | - |
| 100 | 4″ | 114.3 | 2.11 | 3.05 | - | - | - | 6.02 | - | 8.58 | - | 11.13 | - | 13.49 | 6.02 | 8.56 | 17.12 |
| 125 | 5″ | 141.3 | 2.77 | 3.4 | - | - | - | 6.55 | - | 9.53 | - | 12.7 | - | 15.88 | 6.55 | 9.53 | 18.05 |
| 150 | 6″ | 168.3 | 2.77 | 3.4 | - | - | - | 7.11 | - | 10.97 | - | 14.27 | - | 18.26 | 7.11 | 10.97 | 21.95 |
| 200 | 8″ | 219.1 | 2.77 | 3.76 | - | 6.35 | 7.04 | 8.18 | 10.31 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 8.18 | 12.7 | 22.23 |
| 250 | 10″ | 273.1 | 3.4 | 4.19 | - | 6.35 | 7.8 | 9.27 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 28.58 | 9.27 | 12.7 | 25.4 |
| 300 | 12″ | 323.9 | 3.96 | 4.57 | - | 6.35 | 8.38 | 10.31 | 14.27 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 9.53 | 12.7 | 25.4 |
| 350 | 14″ | 355.5 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | 11.13 | 15.09 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | 9.53 | 12.7 | - |
| 400 | 16″ | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | 12.7 | 16.66 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | 9.53 | 12.7 | - |
| 450 | 18″ | 457.2 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | 14.27 | 19.05 | 23.83 | 39.36 | 34.93 | 39.67 | 45.24 | - | - | - |
| 500 | 20″ | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 15.09 | 20.62 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | - | - | - |
| 550 | 22″ | 558.8 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | - | 22.23 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | - | - | - |
| 600 | 24″ | 609.6 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | 17.48 | 24.61 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | - | - | - |
Difference between Hot-Dip Galvanizing and Pre-Galvanizing
The biggest difference between hot-dip galvanized pipe fittings and pre-galvanized pipes is the thinness of the galvanized layer due to the difference in process, which is also the concern of buyers. The table below describes the difference between the two different modes of galvanized pipe.
Benefits of thicker galvanized layer:Hot-dip galvanization results in a thicker zinc coating than pre-galvanization, which offers superior rust and corrosion protection, particularly for pipes that are regularly used outdoors and exposed to snow, ice, rain, and salt.
O revestimento de zinco na chapa de aço deve atender aos requisitos da ASTM A525 Grau G90 e G120. O peso total de zinco das superfícies externa e interna deve estar entre 0,90 oz/pé quadrado (ou 0,45 oz/pé quadrado de cada lado) e 1,20 oz/pé quadrado (ou 0,60 oz/pé quadrado de cada lado). Esses pesos de revestimento não se aplicam à região interna soldada.
| Recurso | Galvanização por imersão a quente | Pré-galvanização |
|---|---|---|
| Espessura do revestimento | Revestimento espesso com requisitos médios mínimos de 45-85μm de acordo com a norma BS EN ISO 1461 | A espessura do revestimento pode variar, mas normalmente é de cerca de 20μm para chapas e 20-30μm para tubos |
| Revestimento contínuo | Revestimento contínuo em todo o objeto | A área não revestida nas bordas cortadas |
| Ligação do revestimento | Forte ligação metalúrgica com o aço base | Forte ligação metalúrgica com o aço base |
| Formabilidade do revestimento | A moldagem após a galvanização por imersão a quente não é recomendada, pois pode danificar o revestimento | Um revestimento fino pode ser formado normalmente sem nenhum dano |
| Aparência do revestimento | Normalmente brilhante, mas pode ser variável | Normalmente brilhante |
| Resistência à abrasão | Uma camada mais espessa de liga de zinco-ferro dura proporciona alta resistência à abrasão | Camada de liga fina com resistência reduzida à abrasão |
| Proteção sacrificial | Oferece o mais alto nível de proteção contra sacrifícios | Proteção sacrificial reduzida devido ao revestimento de camada fina e em algumas áreas não revestidas (bordas cortadas) |
Advantages of Galvanized pipe
So, how can galvanizing your piping system benefit you and your business? The following are some of the advantages of galvanizing pipe supports.
- Cost-Effectiveness
The question you may be asking is: “If pipe galvanizing provides anti-corrosive characteristics, why not just utilize stainless steel pipes?” The solution is a matter of money. However, although stainless steel has corrosion resistance built into its design, it is often more costly than conventional carbon steel. Consequently, galvanizing is a reasonably inexpensive method of adding an additional layer of protection to otherwise durable materials.
- Performance
Alternatives such as paint or other basic coverings, on the other hand, may seem to be a straightforward answer. However, they are not without their drawbacks. For starters, they often chip or scrape the surface, exposing the underlying metal to rust. Second, since they are readily worn away, they must be reapplied on a regular basis. Finally, when subjected to extreme temperature fluctuations or external erosion, they have a tendency to flake or peel off.
- Less Labor-Intensive
Galvanized metal is subjected to a rigorous production process, but after it has been applied to metal, the product is ready to be sent out the door. As a result, your team will not be burdened with the time-consuming and labor-intensive operations of applying paints or other coatings. You will also save time by not having to spend time prepping surfaces, monitoring supports for scratches, or repainting your walls.
Por que escolher a tuspipe?
Desde 1998, a Tianjin United Steel Piping Co., Ltd (TUSPIPE) está comprometida com o fornecimento de tubos de alta qualidade.
Com mais de 500.000 toneladas de capacidade de produção anual, a empresa atende a vários campos e setores, como exploração e transmissão de petróleo e gás, construção naval e automotiva, água e eletricidade, proteção ambiental, engenharia mecânica, construção de infraestrutura etc.
A TUSPIPE valoriza a qualidade e o rigoroso controle de qualidade dos produtos. Para manter a boa qualidade dos produtos, a empresa estabeleceu um Centro de Testes e Inspeção desde 2004. Com uma série de equipamentos de teste e inspeção de última geração, o centro de teste e inspeção é capaz de realizar testes de tração, testes hidrostáticos, testes de impacto, DWTT, etc.
