* Boiler seamless tubes refer to boiler tubes. Boiler divided into general industrial boilers, locomotive boilers and thermal power generation boiler.

* Thermal power boilers in accordance with its vapor pressure is further divided into low, medium, high pressure, subcritical pressure, supercritical pressure boilers, ultrasupercritical unit paramenters.

* Standard: GB5310-1995, GB13296-1991, ASME SA312

* Materials: TP304H, 310H, 321H

* Size: 31.75 ~ 88.9 * 2.11 ~ 12.7mm, maximum length of 13.5m