high quality HDG tube hot dip galvanized steel tube square tubes
What is HDG (hot-dip galvanized) square steel tube？
HDG (hot dip galvanized) square pipe is a steel pipe that is hot-dip galvanized with black high-frequency welded steel pipe as raw material. First of all, the steel pipe shall be pickled. In order to remove iron oxide on the surface of the steel pipe, after pickling, the steel pipe shall be cleaned in ammonium chloride or zinc chloride aqueous solution or mixed ammonium chloride and zinc chloride aqueous solution tank, and then sent to the hot dip galvanizing tank for galvanizing treatment. After several times of hot dip galvanizing, the galvanized steel pipe shall be taken out for cooling, and finally packaged in bundles. The hot-dip galvanized square tube has the advantages of uniform coating, strong adhesion and long service life.
Use of hot-dip galvanized square pipe？
Hot dip galvanized square and rectangular tubes are widely used in manufacturing industries such as construction, machinery, coal mines, chemical industry, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, exploration machinery, etc.
Galvanized square pipe is the uniform name of galvanized black high-frequency welded square pipe and galvanized black high-frequency welded rectangular pipe, that is, steel pipes with equal side length. It is made of processed rolled strip steel. Generally, the strip steel is disassembled, leveled, curled, welded into a round pipe, then rolled into a square pipe from the round pipe, and then cut into the required length. Usually 50 pieces per package. Also called square and rectangular cold-formed hollow section steel, respectively called square pipe and rectangular pipe, code f and j.
Tianjin Yuantai Derun Steel Pipe Manufacturing Group is currently the largest square and rectangular pipe manufacturer in China. The main product, square and rectangular pipe, has 80 patented technologies. It has supplied steel pipe products in more than 1400 large-scale construction projects around the world, and has strictly controlled product quality with national level testing equipment.
square and rectangular hollow section Specification sheet
| O.D. mm | W.T.mm | O.D mm | W.T. mm | O.D mm | W.T. mm | O.D mm | W.T. mm |
| 20*20 | 1.3 | 60*120 80*100 90*90 | 1.50 | 180*180 | 3 | 300*800 400*700 550*550 500*600 | |
| 1.4 | 1.70 | 3.5-3.75 | 9.5-9.75 | ||||
| 1.5 | 1.80 | 4.5-4.75 | 11.5-11.75 | ||||
| 1.7 | 2.00 | 5.5-7.75 | 12-13.75 | ||||
| 1.8 | 2.20 | 9.5-9.75 | 15-50 | ||||
| 2.0 | 2.5-4.0 | 11.5-11.75 | |||||
| 20*30 25*25 | 1.3 | 4.25-4.75 | 12.0-25.0 | ||||
| 1.4 | 5.0-6.3 | 100*300 150*250 200*200 | 2.75 | 300*900 400*800 600*600 500*700 | |||
| 1.5 | 7.5-8 | 3.0-4.0 | 9.5-9.75 | ||||
| 1.7 | 50*150 60*140 80*120 100*100 | 1.50 | 4.5-9.75 | 11.5-11.75 | |||
| 1.8 | 1.70 | 11.5-11.75 | 12-13.75 | ||||
| 2.0 | 2.00 | 12.5-12.75 | 15-50 | ||||
| 2.2 | 2.20 | 13.5-13.75 | |||||
| 2.5-3.0 | 2.5-2.75 | 15.5-30 | |||||
| 20*40 25*40 30*30 30*40 | 1.3 | 3.0-4.75 | 150*300 200*250 | 3.75 | 300*1000 400*900 500*800 600*700 650*650 | ||
| 1.4 | 5.5-6.3 | 4.5-4.75 | |||||
| 1.5 | 7.5-7.75 | 5.5-6.3 | 9.5-9.75 | ||||
| 1.7 | 9.5-9.75 | 7.5-7.75 | 11.5-11.75 | ||||
| 1.8 | 11.5-16 | 9.5-9.75 | 12-13.75 | ||||
| 2.0 | 60*160 80*140 100*120 | 2.50 | 11.5-11.75 | 15-50 | |||
| 2.2 | 2.75 | 13.5-30 | |||||
| 2.5-3.0 | 3.0-4.75 | 200*300 250*250 | 3.75 | 400*1000 500*900 600*800 700*700 | |||
| 3.25-4.0 | 5.5-6.3 | 4.5-4.75 | |||||
| 25*50 30*50 30*60 40*40 40*50 40*60 50*50 | 1.3 | 7.5-7.75 | 5.5-6.3 | 9.5-9.75 | |||
| 1.4 | 9.5-16 | 7.5-7.75 | 11.5-11.75 | ||||
| 1.5 | 75*150 | 2.50 | 9.5-9.75 | 12-13.75 | |||
| 1.7 | 2.75 | 11.5-11.75 | 15-50 | ||||
| 1.8 | 3.0-3.75 | 12-13.75 | |||||
| 2.0 | 4.5-4.75 | 15.5-30 | |||||
| 2.2 | 5.5-6.3 | 200*400 250*350 300*300 | 4.5-6.3 | 500*1000 600*900 700*800 750*750 | |||
| 2.5-3.0 | 7.5-7.75 | 7.5-7.75 | 9.5-9.75 | ||||
| 3.25-4.0 | 9.5-16 | 9.5-9.75 | 11.5-11.75 | ||||
| 4.25-4.75 | 80*160 120*120 | 2.50 | 11.5-11.75 | 12-13.75 | |||
| 5.0-5.75 | 2.75 | 12-13.75 | 15-50 | ||||
| 5.75-6.3 | 3.0-4.75 | 15.5-30 | |||||
| 40*80 50*70 50*80 60*60 | 1.3 | 5.5-6.3 | 200*500 250*450 300*400 350*350 | 5.5-6.3 | 500*1100 600*900 700*800 750*750 | ||
| 1.5 | 7.5-7.75 | 7.5-7.75 | 9.5-9.75 | ||||
| 1.7 | 9.5-9.75 | 9.5-9.75 | 11.5-11.75 | ||||
| 1.8 | 11.5-20 | 11.5-11.75 | 12-13.75 | ||||
| 2.0 | 100*150 | 2.50 | 12-13.75 | 15-50 | |||
| 2.2 | 2.75 | 15.5-30 | |||||
| 2.5-3.0 | 3.0-4.75 | 280*280 | 5.5-6.3 | 600*1100 700*1000 800*900 850*850 | |||
| 3.25-4.0 | 5.5-6.3 | 7.5-7.75 | 9.5-9.75 | ||||
| 4.25-4.75 | 7.5-7.75 | 9.5-9.75 | 11.5-11.75 | ||||
| 5.0-6.0 | 9.5-9.75 | 11.5-11.75 | 12-13.75 | ||||
| 40*100 60*80 70*70 | 1.3 | 11.5-20 | 12-13.75 | 15-50 | |||
| 1.5 | 100*200 120*180 150*150 | 2.50 | 15.5-30 | ||||
| 1.7 | 2.75 | 350*400 300*450 | 7.5-7.75 | 700*1100 800*1000 900*900 | |||
| 1.8 | 3.0-7.75 | 9.5-9.75 | 11.5-11.75 | ||||
| 2.0 | 9.5-9.75 | 11.5-11.75 | 12-13.75 | ||||
| 2.2 | 11.5-20 | 12-13.75 | 15-50 | ||||
| 2.5-3.0 | 100*250 150*200 | 3.00 | 15.5-30 | ||||
| 3.25-4.0 | 3.25-3.75 | 200*600 300*500 400*400 | 7.5-7.75 | 800*1100 900*1000 950*950 | |||
| 4.25-4.75 | 4.25-4.75 | 9.5-9.75 | 11.5-11.75 | ||||
| 5.0-6.3 | 9.5-9.75 | 11.5-11.75 | 12-13.75 | ||||
| 50*100 60*90 60*100 75*75 80*80 | 1.3 | 11.5-11.75 | 12-13.75 | 15-50 | |||
| 1.5 | 12.25 | 15.5-40 | |||||
| 1.7 | 140*140 | 3.0-3.75 | 300*600 400*500 400*400 | 7.5-7.75 | 900*1100 1000*1000 800*1200 | ||
| 1.8 | 4.5-6.3 | 9.5-9.75 | |||||
| 2.0 | 7.5-7.75 | 11.5-11.75 | 20-60 | ||||
| 2.2 | 9.5-9.75 | 12-13.75 | |||||
| 2.5-3.0 | 11.5-25 | 15.5-40 | |||||
| 3.25-4.0 | 160*160 | 3.00 | 400*600 500*500 | 9.5-9.75 | 1100*1000 1100*1100 | ||
| 4.25-4.75 | 3.5-3.75 | 11.5-11.75 | 20-60 | ||||
| 5.0-5.75 | 4.25-7.75 | 12-13.75 | |||||
| 7.5-8 | 9.5-25 | 15.5-40 |
01 Even zinc coating
Through measurement, it is found that the galvanized layer of Yuantai's hot-dip galvanized square tube is evenly distributed
It is found that Yuantai's
hot-dip galvanized square tube
has strong adhesion
3 CERTIFICATION IS
COMPLETE
can produce steel pipe products of world
stardard,such as European standard,American standard,
Japanese standard,Astralian standard,natinal standard
and so on.
04 Long service life
Yuantai's hot-dip galvanized square tube
has a long service life,
some even as long as 35 years
THE ONLY
rectangular tube manufacturer selected into the top ten steel tube brands in China
THE QUALIFIED RATE OF PRODUCTS >100%
Q1: Are you trading company or manufacturer ?A: We are factory.
Q2: How long is your delivery time?A: Generally it is 5-10 days if the goods are in stock. or it is 30 days if the goods are not in stock, it is according to quantity.
Q3:Do you provide samples ? is it free or extra ?A: Yes, we could offer the sample for free charge with the cost of freight paid by customer.
Q4: What is your terms of payment ?A: Payment<=1000USD, 100% in advance. Payment>=1000USD 30% T/T in advance ,balance before shippment.If you have another question, pls feel free to contact us as below
Q5：How to prolong the service life of hot-dip galvanized square pipe?In fact, if we want to use it for a longer time, our usual maintenance is indispensable. Our square tubes can be pickled, which is mainly to remove some stains on the surface of our hot-dip galvanized square tubes. But after pickling, we also want them to be cleaned again with an ammonium chloride or zinc chloride aqueous solution, and then put them in the hot dip tank. After so many maintenance steps, our hot-dip galvanized square tube can be used for a long time.