Import Astm A213t91 Boiler Tubes — Buy in Bulk from Supplier in China

ASTM A213T91 Boiler Tubes from Bestar Steel Co., Ltd. are ferritic/martensitic heat-resistant steel tubes designed for high-pressure, high-temperature boiler and superheater service. The T91 grade, specified under ASTM A213/A213M, contains 9% chromium and 1% molybdenum with controlled vanadium, niobium and nitrogen additions for enhanced creep strength. Bestar lists these tubes in specific dimensions including 63.5x4.25x11800mm and 41.3x8.2x10000mm, indicating outer diameter, wall thickness and length respectively. The grade's nominal composition includes 0.08-0.12% carbon, 8.0-9.5% chromium, 0.85-1.05% molybdenum and 0.18-0.25% vanadium, with a typical hardness range of 250-320 HB.

These tubes are supplied with black paint coating and steel-belt bundling for corrosion protection during storage and transit. The T91 grade was developed as an evolution of T9, offering substantially improved creep-rupture strength through precipitation strengthening from vanadium and niobium carbonitrides. Typical manufacturing involves hot rolling or cold finishing followed by normalizing and tempering heat treatment to achieve the required mechanical properties. Wall thickness variations from 4.25mm to 8.2mm reflect different pressure ratings and design codes for boiler applications. The material maintains structural integrity at metal temperatures up to approximately 650°C, though actual allowable stresses depend on specific design codes such as ASME Section I or EN 12952.

Primary buyers include power plant operators, boiler manufacturers, petrochemical refineries and industrial heat-recovery system builders. These tubes serve in water-tube boilers, heat-recovery steam generators, reheaters and superheaters where steam conditions demand ferritic rather than austenitic grades for thermal expansion compatibility. Importers should confirm with Bestar whether tubes are supplied with mill test certificates to EN 10204 3.1 or 3.2, whether third-party inspection by TUV, SGS or BV is available, and what ASME or PED compliance documentation accompanies shipment. The supplier's Hunan location offers port access via Shanghai or Shenzhen for sea freight.

Bestar Steel Co., Ltd. is located at No. 9 Xingfu Road, Yuhua District, Changsha 410116, in Hunan Province, China. The supplier is classified under the 'imported' tier with 'harbor' trust status. The listing shows a response rate of 0.00% and zero recorded average response hours, which suggests limited or no engagement history through the platform. No information is provided about factory size, year of establishment, annual output, workforce numbers, or specific quality management system certifications such as ISO 9001. The company profile does not name any named clients, export markets, or case references.

What the listing does state is limited to product-level details: specific dimensional offerings, packaging in steel-belt bundles with black paint coating, and application to high-pressure boiler systems. The supplier offers no self-declared MOQ, lead time, price band, Incoterms or payment conditions in the source material. Buyers should therefore treat all commercial terms as requiring direct confirmation. The Hunan location places Bestar within China's central steel-producing belt, with historical concentration in special steel and tube manufacturing, though this regional context should not be mistaken for verified capability claims about this specific company.