| Customization: | Available |
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| After-sales Service: | Support |
| Warranty: | One Year |
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| ASTM A53/API 5L/ASTM A106/BS 1387:1985/EN10255 | ||||||
| Black/Galvanized Steel Tube | ||||||
| Tube | Inch | O.D.(inch) | O.D.(mm) | W.T.(inch) | W.T.(mm) | Pcs/Bundles |
| Light | 1/2' | 0.841 | 21.40 | 0.079 | 0.20 | 153 |
| 3/4' | 1.059 | 26.90 | 0.091 | 2.30 | 127 | |
| 1' | 1.328 | 33.80 | 0.102 | 2.60 | 91 | |
| 11/4' | 1.670 | 42.50 | 0.102 | 2.60 | 61 | |
| 11/2' | 1.903 | 48.40 | 0.114 | 2.90 | 61 | |
| 2' | 2.370 | 60.20 | 0.114 | 2.90 | 37 | |
| 21/2' | 2.991 | 76.60 | 0.126 | 3.20 | 37 | |
| 3' | 3.491 | 88.70 | 0.126 | 3.20 | 19 | |
| 4' | 4.481 | 113.90 | 0.142 | 3.60 | 19 | |
| Medium | 1/2' | 0.856 | 21.70 | 0.102 | 2.60 | 127 |
| 3/4' | 1.072 | 27.20 | 0.102 | 2.60 | 101 | |
| 1' | 1.348 | 34.20 | 0.126 | 3.20 | 61 | |
| 11/4' | 1.687 | 42.90 | 0.126 | 3.20 | 51 | |
| 11/2' | 1.919 | 48.80 | 0.126 | 3.60 | 44 | |
| 2' | 2.394 | 60.80 | 0.142 | 3.60 | 29 | |
| 21/2' | 3.014 | 76.60 | 0.142 | 4.00 | 24 | |
| 3' | 3.524 | 89.50 | 0.157 | 4.50 | 19 | |
| 4' | 4.524 | 114.90 | 0.177 | 4.50 | 14 | |
| 5' | 5.535 | 140.6 | 0.197 | 5.00 | 10 | |
| 6' | 6.539 | 116.1 | 0.197 | 5.00 | 7 |
| Heavy | 1/2' | 0.856 | 21.70 | 0.126 | 3.20 | 127 |
| 3/4' | 1.072 | 27.20 | 0.126 | 3.20 | 101 | |
| 1' | 1.346 | 34.20 | 0.157 | 4.00 | 61 | |
| 11/4' | 1.687 | 42.90 | 0.157 | 4.00 | 51 | |
| 11/2' | 1.919 | 48.80 | 0.157 | 4.00 | 44 | |
| 2' | 2.394 | 60.80 | 0.177 | 4.50 | 29 | |
| 21/2' | 3.014 | 76.60 | 0.177 | 4.50 | 24 | |
| 3' | 3.524 | 89.50 | 0.197 | 5.00 | 19 | |
| 4' | 4.524 | 114.90 | 0.212 | 5.40 | 14 | |
| 5' | 5.535 | 140.6 | 0.212 | 5.40 | 10 | |
| 6' | 6.539 | 166.1 | 0.212 | 5.40 | 7 |
| ASTM A 795 BLACK AND GALVANIZED WELDED AND SEAMLESS STEEL PIPE FOR FIRE PROTECTION USE | |||||
| Availiable Size For Sch10 Pipe(Light-Weight Pipe) | |||||
| Size | Thickness | Mass | Test Pressure | ||
| NPS | DN | OD(mm) | T.K(mm) | Kg/m | Mpa |
| 3/4 | 20 | 26.7 | 2.11 | 1.28 | 4.8 |
| 1 | 25 | 33.4 | 2.77 | 2.09 | 4.8 |
| 1-1/4 | 32 | 42.2 | 2.77 | 2.69 | 6.9 |
| 1-1/2 | 40 | 48.3 | 2.77 | 3.11 | 6.9 |
| 2 | 50 | 60.3 | 2.77 | 3.93 | 6.9 |
| 2-1/2 | 65 | 73.0 | 3.05 | 5.26 | 6.9 |
| 3 | 80 | 88.9 | 3.05 | 6.46 | 6.9 |
| 4 | 100 | 114.3 | 3.05 | 8.37 | 8.3 |
| 5 | 125 | 141.3 | 3.40 | 11.56 | 8.3 |
| 6 | 150 | 168.3 | 3.40 | 13.83 | 6.9 |
| 8 | 200 | 219.1 | 4.78 | 25.26 | 5.5 |
| 10 | 250 | 273.1 | 4.78 | 31.63 | 4.8 |
| Availiable Size For Sch40 Pipe(Standard-Weight Pipe) | |||||
| Size | Thickness | Mass | Test Pressure | ||
| NPS | DN | OD(mm) | T.K(mm) | Kg/m | MPa |
| 1/2 | 15 | 21.3 | 2.77 | 1.27 | 4.8 |
| 3/4 | 20 | 26.7 | 2.87 | 1.69 | 4.8 |
| 1 | 25 | 33.4 | 3.38 | 2.50 | 4.8 |
| 1-1/4 | 32 | 42.2 | 3.56 | 3.39 | 6.9 |
| 1-1/2 | 40 | 48.3 | 3.68 | 4.05 | 6.9 |
| 2 | 50 | 60.3 | 3.91 | 5.44 | 6.9 |
| 2-1/2 | 65 | 73.0 | 5.16 | 8.63 | 6.9 |
| 3 | 80 | 88.9 | 5.49 | 11.29 | 6.9 |
| Hot-dip galvanized pipe | Pre galvanized pipe |
| First,produce ordinary steel pipes with the required welding steel pipe specifications from the steel raw materials,and then proceed with galvanized treatment.The galvanized steel pipe produced in this way is called hot-dip galvanized steel pipe,also konwn as hot-dip galvanized steel pipe.Hot-dip galvanized is the process of immersing metal into a zinc melt.To manufacture galvanized steel using this method,we need to follow four steps:cleaning the surface,flux,hot-dip galvanized coating,and cooling. | The steel raw materials are first galvanized to produce galvanized strip steel,and then processed to produce steel pipes,which are called galvanized strip steel pipes or pre galvanized steel pipes.One of the davantages of pre galvanized over hot-dip galvanized is its better appearence.Pre galvanized steel includes some steps of hot-dip galvanized,such as cleaning the surface,immersing in a hot-dip zinc bath,and the coiling process. |
| Difference between hot-dip galvanized pipe and pre-galvanized | |
| Coating thickness:The minium average requirement in BS EN ISO1461 is a thick coating of 45~85 μm | Coating thickness:The coating thickness may vary,but the coating thickness off plate is usually about 20 μm,and the coating thickness of pipe and wire is usually about 20~30μm. |
| Continous coating:Apply continuous coating to the entire object | Continuous coating:Cutting edge uncoated area |
| Coating bonding:Strong metallurgical bonding with the base steel | Coating bonding:Strong matallurgical bonding with the base steel |
| Coating formability:It is not recommended to form after hot-dip galvanized as this may damage the coating | Coating formability:The coatings can from normally without causing any damage |
| Coating appearance:Usually bright,but variable | Coating appearance:Usually achieving uniform brightness |
| Wear resistance:The thicker hard zinc iron alloy layer has high wear resistance | Wear resistance:The alloy layer reduces wear resistance |
| Sacrificial protection:Provided the hightest level of sacrificial protection | Sacrificial protection:Provided the hightest level of sacrificial protection |
| We can do | 1. All the pipes are high-frequency welded. |
| 2. Both inner and outer welded stabs can be removed. | |
| 3. Special design available according to requirements. | |
| 4. Pipe can be necked down and punched holes. | |
| 5. Supplying BV or SGS Inspection if the client needs it. |
Hot-Dip Galvanized Square and Rectangular Tubes
Hot-dip galvanizing is a widely recognized method for protecting steel from corrosion, and when applied to square and rectangular tubes, it offers superior performance in a range of applications.Their manufacturing process, properties, applications, and benefits are as below.
Manufacturing Process
The manufacturing process of hot-dip galvanized square and rectangular tubes begins with the creation of the tube from steel coils. The coils are first formed into tubes by cold rolling or hot rolling processes and then cut to the desired length. The tubes are then cleaned to remove any impurities, which is crucial for a strong bond between the steel and the zinc coating.
Next, the tubes are submerged into a bath of molten zinc. The temperature of the zinc bath is critical, typically maintained between 450°C and 480°C. The immersion time and the temperature determine the thickness of the zinc coating. Once coated, the tubes are cooled and then passivated to prevent white rust formation.
Properties
Hot-dip galvanized square and rectangular tubes possess several desirable properties that make them suitable for various applications. These include:
In conclusion, hot-dip galvanized square and rectangular tubes are an excellent choice for applications where corrosion resistance and durability are paramount. Their versatility in manufacturing and adaptability in various environments make them a preferred material in the construction and engineering industries.
Q1: How can I get a quotation from you ?
A1:You can leave us message, and we will reply every message in time. Or we may talk on line by We Chat / Whats app/Email.
Q2:Can I get samples before order ?
A2:Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings. But the customer will pay the freight.
Q3:What product information must I provide before making a purchase ?
A3:Please provide the grade,width,thickness,and surface treatment requirement,as well as the quantities you require.
Q4:What about product pricing information?
A4:Prices vary due to changes in raw materials on a regular basis.
Q5:Can I have a visit to your factory?
A5: Of course.Our factory located at No.1,Hengtong Road,Daqiuzhuang Industrial Zone,Tianjin,China.Customers that from all over the world are welcomed to our factory.
Q6:How long is your lead time?
A6:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15-30 days, depending on the quantity.
Q7:What are your payment terms?
A7:Payment<=1000USD, 100% in advance. Payment>=1000USD 30% T/T in advance ,balance before shippment.If you have another question, please feel free to contact us as below.
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