Standard: ASTM A333/A333M Gr.6
This specification covers seamless ferritic and EFW Welded carbon and alloy-steel pipe for high-temperature service.
Application of ASTM A333 Seamless Steel Pipe
Seamless carbon and alloy steel pipe is intended for use at low temperatures and in other applications requiring notch toughness. For example: power stations, nuclearpower plants, chemical plants, oil refineries, industrial plants and so on.
Manufacturing Process of ASTM A333 Seamless Steel Pipe:
ASTM A333 pipe shall be made by the seamless steel pipe (cold-drawn or hot rolled) as specified.
Details of ASTM A333 Gr.6 Seamless Steel Pipe:
Manufacture: Seamless and welding and process are available, seamless process: cold drawn or hot rolled, but Grade 4 Shall be made by the seamless process.
Seamless Steel Pipe: OD: 20~700mm W.T.: 2-30mm
Grade: Grade 1, Grade 3, Grade 4, Grade 6
Length: 6M or specified length as required.
Ends: Plain End, Beveled End.
Chemical Composition of ASTM A333 Gr.6 Seamless Steel Pipe:
Grade and Chemical Composition (％)
Mechanical Properties of ASTM A333 Gr.6 Seamless Steel Pipe:
|ASTM A333||Grade||Tensile Strength (MPa）||Yield Point (MPa)||Elongation (%)|
a.Quantity (feet, meters, or number of lengths)
b.Name of material(seamless or welded pipe)
d.Size(NPS or outside diameter and schedule number of average wall thickness):
e.Length (specific or random)
g.Optional requirments(heat analysis requirement in the chemical composition, stress relieving, reqair by welding,other temperatues for impack test, hydrostatic test or nondestructive electric test)
h.Test report required
j.Special requirents or exceptions tothis specification
All seamless and welded pipe, other than Grades 8 and 11, shall be treated to control their microstructure in accordance with one of the following method:
Normalize at the discretion of manufacturer, reheat to a suitable tempering temperature. For the seamless process only, reheat and control hot working and the temperature range from 1550 to 1750°F and cool in air or in a controlled atmosphere furnace from an initial temperature of not less than 1550°F. Seamless pipe of Grades 1,6 and 10 maybe heat treated by heating to a uniform temperature of not less than 1500°F.
Apperance for ASTM A333 Gr.6 Seamless Steel Pipe:
A sufficient number of visual surface imperfections to provide reasonal assurance that they have been properly evaluated with respect to depth. The defect shall be removed or cut off within the limits of requirments on length. The finished pipe shall be reasonal straight.
Seamless or welded
Hot finished, cold drawn
letters "LT" (except when a lower test temperature is required because of reduced specimen size, in which cas, the higher impack test temperature applicable to a full-size specimen should be marked.)
Letter "QT" (when the pipe is furnished in the quenched and tempered condition)
Packing for ASTM A333 Gr.6 Seamless Steel Pipe:
a.Bare pipe or Black / Varnish coating (customerized);
b.6" and below in bundles with two cotton slings;
c.Both ends with end protectors;
d.Plain end, bevel end(2" and above with bevel ends, degree: 30~35°), threaded and coupling;