The high pressure boiler is made by thick-wall seamless steel tube. It applies to steam conduit and water supply conduit used for the supercritical boiler and the ultra supercritical boiler.

Its specifications are as follows: The outside diameter is Φ 300 ~ Φ 1200, and the length is 4 m to 12 m. The materials used is 12Cr1MoVG, 12Cr2MoG, SA_106C, P12, P22, and P91.

In addition, it has the features of good compactness, high cleanliness, high-temperature mechanical property and high creep rupture strength.

Moreover, NHIG has the production capacity of producing 10, 000 tons of thick-wall seamless steel tube used on high pressure boilers with various specifications.