Import A335 P91, P11, P22... — Buy in Bulk from Supplier in China

A335 P91, P11 and P22 are chromium-molybdenum alloy steel seamless pipes engineered for high-temperature, high-pressure service in power generation and petrochemical infrastructure. Wuxi Dexin Steel Tube Co., Ltd supplies these ASTM A335 grades with outside diameters from 20 mm to 1200 mm and wall thicknesses up to 150 mm, manufactured to ASTM, GB, DIN and JIS standards. The P91 grade contains 9% chromium and 1% molybdenum with vanadium and niobium additions, delivering creep rupture strength significantly above P11 and P22 at elevated temperatures.

The material composition varies by grade: P11 (1.25%Cr-0.5%Mo) suits intermediate temperatures to around 540 degrees C; P22 (2.25%Cr-1%Mo) extends service to approximately 580 degrees C; P91 operates at metal temperatures up to 650 degrees C with design stresses roughly 30% higher than P22. Typical manufacturing involves hot-rolling or cold-drawing of seamless billets, followed by normalising and tempering heat treatment. Wall thickness tolerance typically conforms to ASTM A999 / A999M, with standard ovality limits of 1.5% for OD over 88.9 mm. Standard lengths range from 6 to 12 metres, though custom cutting is common for project orders.

These seamless pipes serve boiler tubing, superheater tubes, reheater lines and main steam piping in thermal power plants, plus refinery process piping and high-temperature headers in petrochemical complexes. Buyers include EPC contractors, power equipment fabricators and specialized industrial distributors. Trade terms referenced include FOB and CIF, though specific Incoterms, lead times and exact MOQ must be confirmed directly with Wuxi Dexin given the zero response rate recorded on this listing.

Wuxi Dexin Steel Tube Co., Ltd operates from a 20-floor office at Mingzhu Plaza, 8 Dachengxiang Zhongshan Road, in Wuxi, Jiangsu Province, China. The supplier is classified as an imported-tier entity with a harbor trust tier. The listing shows a response rate of 0.00% and an average response time of zero hours, which indicates no documented reply history through this channel. No manufacturing plant address, production capacity, year of establishment, workforce size or revenue figures are provided in the available profile data.

The company's product focus centres on alloy steel seamless tubes for high-temperature pressurearter service, specifically the P91, P11 and P22 grades demanded by power and petrochemical sectors. Buyers should note that verification details, certification scope, quality management system registration and reference projects are not stated in the profile and must be requested directly. The Jiangsu location places the supplier within China's established steel tube manufacturing corridor, though this geographic concentration does not alone confirm production capability or quality system compliance.