Information about DSAW pipe, ERW pipe, Helical Wound pipes and Seamless pipes

 

Common sizes for ERW Steel Pipe range from 2 3/8 inch OD to 24 inch OD in a variety of lengths to over 100 feet. Surface finishes are available in bare and coated formats and processing can be handled on site to customer specifications. 

Information about DSAW pipe, ERW pipe, Helical Wound pipes and Seamless pipes Question: I want to ask about DSAW pipe, ERW pipe, Helical Wound Seamless pipe and pipe: how to detail the manufacturing process, what are the applications of each pipe, where the only plant capable of producing pipe and possibly the study of metallurgist?

Response 1: For seamless pipe manufacture:
Round billet heating process certainly get (Hot working process) with temperature above the temperature of Recrystallization (above 0.5 T melting). Rotating the plunger through the center of the billets are heated. That's what is called a seamless pipe. Microstructurenya same with Hot Working for forming steel.
Based on API Spec 5CT: Seamless pipe is getting treatment Pana (Heat Treatment) with process parameters based on the desired performace (Parameter distandar the Yield Strength). Material used type of HSLA (High Strength Low Alloy Steel). Step treatment:

   1. Heating to temperatures Austenization, hold temperature until homogeneous (Austenite phase is expected that all of its structure.
   2. Quenching with water spray (this is commonly done), because the material of HSLA sensitivity of crack can be reduced. Microstructurenya (Martensite and retained austenite)
   3. Tempering, this is where the strength of the pipe diadjust. What is clear is usually used double tempered. this is where the grade pipes such as N-70 or P-110 Temper Martensite diadjust.Strukturnya as usual.
After going through this stage, the pipe diinspect Ultrasonic Inspection method, MPI for both ends or electromagnetic inspection (EMI). If the application is for Drilling pipes, threaded connections with various types depending on the application. The next process Phospating / Copper plating diulirnya, Sandblasting & last Hydrotest. You can contact the PT. Seamless Pipe Indonesia Jaya or Citra Tubindo.
As for ERW pipe (Electric Resistant welding): The material in the form of plate bending and welding with rotary roll, subsequent treatment with Seamless Pipe. Zak, microstructure for this process together with the existing dilab Spot welding metal.