Welded Steel Pipes
The welded pipe inherits its durability and long life from the following factors:
Our involvement with steel beams is more recent but our inventory which covers the whole range of European sections ( HEA/HEB/HEM up to 1000 and IPE up to 750 ) as well as a wide range of British and American sections follows the same strict requirements of quality and traceability. Cutting: we can saw cut tubes up to Ø 813 mm and all beams up to HEM 1000. New stock of certified tubes multiple standards.
Steel is created when carbon is added to iron, which is relatively weak on its own. High-alloy types of steel are favored in the piping industry for service in extreme conditions, whether it be in hot or cold conditions or subject to rough use. Alloys in stainless steels can include chromium, manganese, silicon, nickel and molybdenum.
Tool steels are what turn other types of steel into products or equipment used in industry. Finally, pipes don’t need cutting edges. It’s cheaper and easier to use comparatively softer, lower-alloy steels to form pipe and then heat treat up to a specified hardness.
Learn more about types of steel in piping. The complex chemistry and metallurgy present in steel production can be hard to grasp, but it’s helped industries refine and improve their critical processes. Steel pipe manufacturer, Hall Longmore today is the largest operation of its kind in Africa south of the Sahara, exporting to more than 30 countries around the globe.
In comparison with nickel-based alloy steel, its strength is increased, its weight is reduced, and its cost is reduced by about 100%. Its service life is 10 to 15 times the service life of corrosion-resistant steel. Steel for base pipe (mechanical performance).
Combination-pipe tensile strength slightly higher than the tensile strength of base pipe. The connections are the weak links of tubing string; thus, it is required that the connections have strengths and seals that are equal to those of the pipe body. This structure includes a special adaptive Teflon seal ring and internal corrosion-resistant alloy steel liner (Figure 11-33).
The internal corrosion-resistant alloy steel liner that seals the exposed part of the collar thread can prevent galvanic corrosion in the J position of combination tubing collar thread in combination with the sealing of a special adaptive Teflon seal ring. Least common of the three methods is spiral-welded pipe. Figure 2.4 shows the three pipes previously described in their final forms.
Seamless pipe is produced in single and double random lengths. Pipes 2″ and below are found in double random lengths measuring from 35′-0″ to 40′-0″. Figure 3.2 illustrates a typical stress-strain diagram for steel pipe.
Some high-strength or alloyed pipe may not be suitable for certain corrosive environments. Table 3.4 compares the relative cost of steel pipe versus common alloys. Table 3.3. Comparative cost of Grades B and X—grade pipe for a 4.5 in. OD line having a maximum allowable working pressure of 3100 psi and a design factor of 0.72 (Reference: ASME B31.8 and B31.4)