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High-pressure Boiler Seamless Steel Pipe

High-pressure boiler seamless steel tubes are often under high temperatures and pressure when used. The tubes will be oxidized and corroded under the action of high-temperature flue gas and water vapor. It is required that the steel pipe has high durability, high resistance to oxidation and corrosion, and good structural stability. High-pressure boiler seamless tubes are mainly used to manufacture superheater tubes, reheater tubes, air ducts, and main steam tubes for high-pressure and ultra-high-pressure boilers.

Application:
 ①General boiler seamless pipes are mainly used to make water wall pipes, boiling water pipes, superheated steam pipes, superheated steam pipes for locomotive boilers, large and small smoke pipes and arched brick pipes.
②High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air guide tubes, main steam tubes, etc. of high-pressure and ultra-high-pressure boilers.

EN 10216-1 P265 Seamless steel tubes will be manufactured by a seamless process. The forming operations and delivery conditions are shown in Table 1.

                                        Table 1 — Forming operations and delivery conditions  

                                   Chemical composition of EN 10216-1 P265

1. Chemical composition (cast analysis) a in % by mass for quality TR2

2. Chemical composition (cast analysis) a in % by mass for quality TR1

                            Mechanical properties of EN 10216-1 P265
1. Mechanical properties for quality TR2

Note: l = longitudinal t = transverse

 2. Mechanical properties for quality TR1

Note: l = longitudinal t = transverse

                                          Tolerances of EN 10216-1 Seamless steel tubes
Tolerances on outside diameter and on wall thickness

                                           Tolerances on exact lengths