Good Quality Pre Galvanized Round Pipe Gi Pipe Pre Galvanized Round Steel Pipe for Construction Structure Parts

• Customization: Available
• After-sales Service: Support
• Warranty: One Year
• Model NO.: round steel pipe
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Galvanized
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Thickness: 0.8-60mm
• Length: 6m, 12m According to Client Requirement
• Od-Square: 10*10mm-1000*1000mm
• Od-Rectangular: 10*15mm-800*1100mm
• Od-Round: 10.3mm-609mm
• Technology: ERW, LSAW, SSAW
• Delivery Time: 7-30 Days
• Materials: ASTM/AISI/SGCC/Chcc/Tdc51dzm/Tdc52dts350gd/Ts550gd
• Zinc Coating: 30-275G/M2
• Oiled or Non-Oiled: Non-Oiled
• Alloy or Not: Non-Alloy
• Processing Service: Welding, Punching, Cutting, Bending, Decoiling
• Certification: CE, LEED, BV, Phd&EPD, Bc1, En10210, En10219
• Invoicing: by Theoretical Weight
• Grade: Q235, Q235B, S275, S275jr, A53, St37, etc
• Transport Package: Bundles
• Trademark: Yuantai Derun
• Origin: Tianjin, China
• Production Capacity: 10million/Year

Product Description

Our Adavantage:
√ Quick reply within 24 hours.
√ Large Stock for regular sizes.
√ Free sample high quality.
√ 100% after-sales quality and quantity assurance.
 

Product Parameters

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

     
Do you know the difference between Hot-dip galvanized steel pipe and Pre galvanized steel pipe?Please check following!
 

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

Product Details

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.

 

Process Flow

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:

• Corrosion Resistance: The zinc coating offers excellent protection against corrosion, making the tubes ideal for outdoor use and in environments where rusting is a concern.
• Durability: The zinc coating can last for decades without maintenance, depending on the thickness of the coating and the environment.
• Flexibility: These tubes can be bent, cut, and welded without compromising the integrity of the zinc coating.
• Aesthetic Appeal: The smooth, shiny finish of the zinc coating adds a visually appealing aspect to constructions and designs.

Applications

Hot-dip galvanized square and rectangular tubes are used in numerous applications due to their strength, durability, and resistance to corrosion. Some of the common applications include:

• Construction: They are used in the construction of buildings, bridges, and scaffolding.
• Automotive: Used for chassis, exhaust systems, and other structural components.
• Agriculture: Ideal for fencing, livestock handling, and irrigation systems.
• Fencing: Popular in residential and commercial fencing for its durability and low maintenance.
• Utility Poles: Used in the construction of transmission towers and utility poles, ensuring long-term performance.

Benefits

The benefits of using hot-dip galvanized square and rectangular tubes are numerous:

• Longevity: The zinc coating significantly extends the life of the steel, reducing the need for replacement.
• Cost-Effective: Although the initial cost is higher than untreated steel, the long-term savings in maintenance and replacement make it a cost-effective choice.
• Environmental Friendliness: Zinc is a recyclable material, contributing to sustainability efforts.
• Safety: The corrosion resistance ensures structural integrity over time, which is critical in safety-sensitive applications.

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.

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FAQ

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.