Recently, Baosteel Special Steel (ultra) supercritical boiler TP347HFG steel pipe has achieved the delivery of first batch of order contract . Upon examination, all performance indicators meet the standard requirements, with sound control of key performance grain size.

By tracking the market and production process R&D in recent two years, Baosteel Special Steel focus on breakthrough at the grain size control technology, solving the problem of finished products grain size control. During production, the key point during the steel pipe manufacturing process are strictly controlled with setting up the witness point at site, to ensure that all products meet user's requirements.