Wednesday 9 January 2013

History of the development of hot-dip galvanizing



 Hot dip galvanized (galvanizing), also known as hot-dip galvanized and hot-dip galvanized: it is an effective anti-corrosion of the metal, mainly used in the metal structure of the industry facilities. The rust steel immersed in liquid zinc melt around 500 , steel members attached to the surface of the zinc layer, which play the purpose of anti-corrosion . Hot-dip galvanizing process: finished pickling - washing - plus help the bath - drying - hang plated - cooling - Pharmaceutical - cleaning - polishing - hot galvanized completion. Corossion is one of the chronic metal disease that destroys the metals gradually.

The hot-dip galvanizing is evolved by ancient Redu, has 140 years of history since 1836, France had been used in industrial hot dip galvanized. However, hotdipped galvanized steel pipe manufacturer in the past three decades along with the rapid development and large-scale development of the cold-rolled steel strip. Galvanizing process not only makes metal an anti corrosive but helps in providing strength as well as increases the life span of metals.

Monday 7 January 2013

ASTM PIPE



 Services of ASTM International. Use of standards. Annual book of ASTM 

 ASTM PIPES
 These ASTM standards define the specific manufacturing process of the material and determine the exact chemical composition. Most of hot dipped galvanized steel pipe manufacturer keeps this standard for fittings and flanges, through percentages of the permitted quantities of carbon, magnesium, nickel, etc., and are indicated by "Grade".

 For example, a carbon steel pipe can be identified with Grade A or B, a stainless-steel pipe with Grade TP304 or Grade TP321 etc..
Below you will find as an example a table with chemical requirements for fittings ASTM A403 Grade WP304, WP304L, WP316L and a table with frequent Grades, arranged on pipe and pipe-components, which belong together as a group.
ASTM Pipe
1:Out Dimesions:1/2"-24"
2:Thickness:SCH10-SCH160
3:Standard:ASTM A53 GR.B ,/A106/A178/A179/A192/A210/A213/A333/
A335/A283/A135/A214/315/A500/A501/A519/A161/A334 ect.
4:Surface Treatment: painting or according to customers' requirement
5:Length:<=12M
6:Advantage:can be manufactured by customer requirement
Packing & Delivery Details: 
1:Packing Detail: Export standard packing or according to customers' requirements 
2:Delivery Detail: Within 20-30 days after the receipt of T/T or L/C.