Ultra-supercritical unit boiler header and welding method thereof

• Main Authors: WANG LINSEN, ZHONG ZHENGBIN, ZENG HUIQIANG, ZHANG WEI, LIU HONGWEI
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2023
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; HEATING; LIGHTING; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METHODS OF STEAM GENERATION; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; STEAM BOILERS; STEAM GENERATION; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

The invention discloses an ultra-supercritical unit boiler header which comprises a header barrel and a large tube seat, and the header barrel and the large tube seat are made of ferrite creep-resistant heat-resistant steel containing 8.50%-9.50% of Cr, 2.40%-3.50% of W and 2.50%-3.50% of Co according to the mass ratio. The header barrels are connected with the large pipe bases through barrel and base connecting weld joints, the header barrels are connected through barrel and barrel connecting weld joints, the barrel and base connecting weld joints are connected in a beveled corner joint welding mode, and the barrel and barrel connecting weld joints are connected in a beveled butt joint welding mode. The ultra-supercritical unit boiler header and the welding method have the beneficial effects that reasonable header component manufacturing materials are selected, a proper welding process method is designed, the ultra-supercritical unit boiler header capable of meeting the 630-DEG C parameter and the welding me