Galvanized square pipe from the production process is divided into hot dip galvanized square pipe and cold galvanized square pipe. It is because of the different processing of these two galvanized square tubes that they have many different physical and chemical properties. In general, there are many differences in strength, toughness and mechanical properties. Hot dip galvanized square pipe Hot-dip galvanized square tube is a square tube made of steel plate or steel belt crimped and welded. On the basis of this square tube, the square tube is placed in the hot-dip galvanized pool and formed after a series of chemical reactions. The production process of hot-dip galvanized square pipe is relatively simple, and the production efficiency is very high, and the varieties and specifications are also many. This square pipe requires little equipment and capital, which is suitable for the production of small galvanized square pipe manufacturers. But from the strength of the steel tube strength is far lower than seamless square tube. Cold galvanized square pipe Cold galvanized square pipe is in the use of the principle of cold galvanized square pipe to have corrosion resistance. Different from hot dip galvanized cold galvanized coating is mainly anticorrosive through the principle of electrochemistry, so it is necessary to ensure sufficient contact between zinc powder and steel, resulting in electrode potential difference, so the steel surface treatment is very important. Features 1. Size: 15mmx15mm-300x300mm 2. Material: Carbon steel 3. Factory price 4. Do small order

Item	galvanized square steel tube
material	Q235B/Q345b/Ss400/A36/St37
certifications	ISO9001 /SGS
standard	ASTM BS GB API
size(dia)	15*15mm-300*300mm
item	black rectangular section pipe
size	10*20mm-200*400mm
technique	welded ,ERW ,cold rolled .hot rolled
surface	Bared, Galvanized, Oiled,Or Other Anti-corrosive Treatment.We can produce other specifications according to customers requirements.
packaging	1.Big OD:in bulk 2.Small OD:packed by steel strips 3. 20"GP:5.85*2.2*2.2 40"GP:11.85*2.2*2.2 Black steel pipe: oiled/painted, in bundles and tarpaulin outside According to the requirements of customers
inspection	With Chemical Composition and Mechanical Properties Analysis;Hydrostatic Test, Dimensional and Visual Inspection, Also With Nondestructive Inspection
Usage/Application	Mechanical & manufacture, Steel structure, Shipbuilding, Bridging ,Automobile chassisIndustrial water lines/plant piping, Vehicular chassis and frames, Idlers & belt conveyorsAgriculture and Irrigation, Scaffoldings, Electrical Cable conduits, Cooling towers, Antenna and Telecom Towers, Cold storages, Tabular polesFire Protection Systems, HVAC, Plumbing,Fabrication industry,
main market	North America     South America   Eastern Europe  Southeast Asia Africa  Oceania   Mid East   Eastern Asia   Western Europe Central America   Northern Europe   Southern Europe South Asia   Domestic Market
country of origin	china
Productivity	5000tons per month
delivery  time	within 15 working days after receiving the payment or 100% Irrevocable L/C at sight

Size(mm)	Thickness(mm)	Size(mm)	Thickness(mm)	Size(mm)	Thickness (mm)	Size(mm)	Thickness (mm)
20*20	1.0	60*60 50*70 40*80 50*80 70*70 60*80 100*40	1.3	120*120 140*80 160*80 75*150 100*150 160*60	2.5-2.75	33*450 300*500 400*400	4.5-5.75
	1.3		1.4		3.0-4.0		7.5-11.75
	1.4		1.5		4.25-4.75		12.5-13.75
	1.5		1.7		5.25-6.0		14.5-14.75
	1.7		1.8		6.5-7.75		15.5-17.75
	2.0		2.0		9.5-15	450*450 200*600 300*600 400*500 400*600 500*500	4.5-4.75
25*25 20*30	1.3		2.2	130*130 80*180 140*140 150*150 200*100	2.5-2.75		7.5-7.75
	1.4		2.5-4.0		3.0-3.25		9.5-9.75
	1.5		4.25-5.0		3.5-4.25		11.5-13.75
	1.7		5.25-6.0		4.5-9.25		14.5-15.75
	1.8				9.5-15		16.5-17.75
	2.0	90*90 75*75 80*80 60*90 60*100 50*100 60*120 50*120 80*100	1.3	160*160 180*180 250*100 200*150	2.5-2.75
	2.2		1.5		3.5-5.0
	2.5-3.0		1.7		5.25-7.75
30*30 20*40 30*40 25*40	1.3		1.8		9.5-15
	1.4		2.0	150*250 100*300 150*300 200*200 135*135	2.75
	1.5		2.2		3.0-3.25
	1.7		2.5-4.0		3.5-7.75
	1.8		4.25-5.0		9.5-12.5
	2.0		5.25-5.75		12.75-15.75
	2.2		7.5-7.75	200*300 250*250 100*400 200*250	3.52-3.75
	2.5-3.0	100*100 80*120 125*75 140*60 50*150	1.5		4.5-11.75
25*50 40*40 30*50 30*60 40*50 40*60 50*50	1.3		1.7		12.5-14.75
	1.4		1.8		15.5-17.75
	1.5		2.0	200*350 200*400 300*300 250*350	4.75-7.75
	1.7		2.2		9.5-11.75
	1.8		2.5-5.0		12.5-14.75
	2.0		5.25-6.0		15.5-17.75
	2.2		6.5-7.75	300*350 300*400 350*350 250*450	4.75-7.75
	2.5-4.0		9.5-13		9.5-11.75
	4.25-5.0				12.5-14.75