Saturday, March 7, 2009

Pipe

1 Types of pipes based on the method of making 

a). Seam pipe (pipe with a clamp / connections) 

Electric-resistance welded pipe: Pipe connection has a longitudinal joint which is created by heat from the custody of the pipe flow of electric current in a series of pipes which is a part of it, and with the application pressure. 

Furnace-butt welded pipe: Pipe connection has a longitudinal weld in a mechanical way of through koil that have been established through the device and the heated roll-roll welding. 

Electric fussion welded pipe: Pipe connection has joint which is made in the form of a tube by electric bow welding manually or automatically. Welding can be with or without the metal (filler metal). 

Double submerged arc-welded pipe: Pipe has a longitudinal connections are made at least 2 most fitting and one of them were in the pipeline. Connection made by the fusion heating power bow between the base metal with elektrode. Welding system used is submerged arc welding (SAW). 

Spiral welded pipe: Pipe connection has a helical shape that joint through welding electric resistance, electric fussion, and double-submerged arc welding. 

b). Seamless pipe (no pipe clamp / connections) 

Pipe is produced with the process of piercing of the billet, followed by a rolling or drawing or both. 

2 Length of Pipe 

Based on the general market standard, the length of pipe divided into the following categories: 
a. Single random length: the length of + / - 6 meters (20 feet). 
b. Double random length: Pajang + / - 12 meters (40 feet). 

3 Thickness Pipe 

Thick pipe is generally specified in a "Schedule Number". However, in special cases such as for service at high pressure and temperature, Corrosion allowance rates, with economic considerations in the market and the availability of the thick pipe determined in accordance with the results of the calculation of "Calculated thickness"

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