Section one Pipe Data Flashcards
What is the most commonly used pipe in industry?
Carbon pipe/steel pipe.
Why is carbon pipe/steel pipe commonly preferred?
Because of its high temperature and pressure ratings, ease of joining and overall durability.
What is type F pipe?
Furnace butt welded or continuous welded pipe.
What is type E pipe?
Electric resistance welded pipe.
What is type S pipe?
Seamless pipe.
What method of manufacture pipe has replaced lap welding pipe?
Electric resistance (type E).
What two types of pipe are made by shaping rolls of coiled steel called “skelp”?
Type F and Type E.
In electric resistance welding, the heat is generated by:
The steel’s resistance to an electrical current that is passed through the edges to be welded.
In electric resistance welding, the edges of the skelp used to form the pipes are:
Fused together by pressure and heat without the addition of filler metal.
In the continuous butt welding process, skelp is first heated in a skelp heating furnace to a welding temperature of approximately:
2300F (1260C)
What are the two common methods of producing seamless pipe?
1) Hot rotary piercing
2) Extrusion process method
What is the extrusion process method for seamless pipe?
Hot billets of metal are formed into seamless pipe by forcing the billets through an extrusion die and over a forming mandrel
What is the rotary piercing method for seamless pipe?
Heavy rollers rotate and advance hot billets of metal over a mandrel or piercing plug.
In seamless pipe what is the more common method of manufacture?
Hot rotary piercing.
In addition to type F type E and type S steel pipe, the two methods of manufacturing for larger sized pipe are what?
The straight seam method and the spiral method.
The straight seam method of manufacture for larger pipe is done by:
Forming skelp into a cylindrical shape and sub arc welding along the seam.
The spiral seam method of manufacture for larger pipe is done by:
Spiraling scalp into a cylindrical shape and then welded along the spiral seam.
What is skelp?
Steel plate to be formed into pipe.
Many of the standards and specifications for pipe correspond between:
Countries and/or agencies
What six things do the standards and/or specifications for pipe indicate?
Grade designations Intended use Testing practices Manufacturing methods Chemical properties Various physical characteristics.
What are the most common grades of steel pipe?
Grade A and B and the less common grade C.
Of grade A, B and C pipe which one has the greater tensile strength? Why?
Grade B, because of its greater carbon content.
What application is grade A pipe preferred for? Why?
Close coiling or cold bending of pipe, because of its lower carbon content which makes it more ductile and less brittle.
Steel pipe is produced in three weights or general wall thickness classifications. What are those classifications?
- Standard (STD)
- extra strong (XS) or extra heavy (XH)
- double extra strong (XXS) or double extra heavy (XXH)