Pre - galvanized pipe: pre-galvanized pipe is made of hot dipped galvanized steel strip directly ,
Usage: Used for low pressure liquid delivery, such as water, gas, and oil,fence,conduit,green house etc.
Standard: GB/T3091 - 2001 ,BS1387 - 1985 , DIN EN10025 ,EN10219 , JIS G3444:2004 , ASTM A53
Steel Grade: GB/T3091 - 2001:Q195 , Q235 
BS1387 - 1985 , DIN EN10025 EN10219 :S235JR
JIS G3444:2004:STK400 
ASTM A53: GR. A , GR. B

  Pre galvanized steel pipe:

Hot dipped galvanized pipe : hot dipped galvanized pipe owns thicker zinc coating than pre-galvanized pipe ,black pipes will be dipped into zinc pool for galvanized. 
Standard: GB/T3091 - 2001 ,BS1387 - 1985 , DIN EN10025 ,EN10219 , JIS G3444:2004 , ASTM A53
Steel Grade: GB/T3091 - 2001:  Q195,Q235 , Q345
BS1387 - 1985 , DIN EN10025 ,EN10219 :S235JR ,S275JR,S355JR, S355J2H
JIS G3444:2004:STK400 ,STK500
ASTM A53: GR. A , GR. B, GR. C , GR. D

1.Black square&rectanhgular steel pipe:ERW steel tube
2.Pre-galvanized square&rectangular steel pipe: Pre-galvanized square/rectangular tube is made of hot dipped galvanized steel strip directly.
3.Hot dipped galvanizedsquare&rectangular steel pipe : Hot dipped galvanized square/rectangular tube owns thicker zinc coating than pre-galvanized square/rectangular tube. Black tubes will be dipped into zinc pool for galvanizing.
4.Electro galvanized square&rectangular steel pipe : The technology of electro galvanized square/rectangular tube is similar to hot dipped galvanized tube, but the thickness of zinc coating is less than hot dipped galvanized tube.
5.Painted square&rectangular steel pipe:Painted square/rectangular to remove the rust and clean the oil first and then paint the required color paint. 
Standard:GB/T6728:2002,ASTMA500,JIS G3466,EN10210,EN10219 
Steel Grade:
GB/T6728:2002 : Q195 , Q235 , Q345 
ASTM A500:GR. A , GR. B, GR. C , GR. D
JIS G3466 : SS440,SS540
EN10210, EN10219: S235JR ,S275JR,S355JR, S355J2H

        Tianjin Jinnuo Steel Pipe Co.,Ltd was established in 1991,with decades of development,it has become an enterprise which integrates production and post-processing,with more than 100 workers.
        Tianjin Kuifang International Trade Co.,Ltd as a branch of Jinnuo Steel,till now,has served for more than 100 countries.
our main products are ERW steel pipe, galvanized steel pipe,seamless steel pipe and steel strip,relating products are stainless steel pipe,steel plate,gavlanized steel coil and PPGI coil,and also have other related steel products
       Our final vision is to be your partner in China, far more than just a supplier,If you can give us a chance ,we will give you a surprise.

Standard export packaging:
1.in bundles with container 
2.in bunlk ship 
3.with waterproof package.
We can do the package based on custermer's requirement.

Q: Are you trading company or manufacturer ?
A: Yes ,we are the manufacturer,welcome to visit our company.
Q: Can you send us the sample? 
A: Yes, Yes, free samples can be supplied.
Q: How long is your delivery time?
15-30 days after receiving deposit.
Q: What payment terms can you accept?
 A:  T/T,100% L/C at sight, Cash, Credit card
Q.How about the delivery time?
A :15-30 days after receiving deposit