Corrosion Resistance Seamless Alloy Steel Pipe ASTM A335 P21 For Heat Exchanger

ASTM A335 P21 Seamless Alloy Steel Pipe For High-Temperature Steam Piping

Specification

ASTM A335 P21 Alloy Steel Pipe is a seamless, ferritic alloy steel pipe designed for high-temperature service, often called a chrome moly pipe due to its Chromium (Cr) and Molybdenum (Mo) content, which enhances high-temp strength and corrosion resistance.

ASTM A335 P21 Alloy Steel Pipe Chemical Composition

Sources American Standard A335 / A335M TABLE 1 Chemical Requirements

ASTM A335 P21 Alloy Steel Pipe Mechanical Properties

Sources American Standard A335 / A335M TABLE 3 Tensile Requirements

ASTM A335 P21 Alloy Steel Pipe Heat Treatment

Sources American Standard A335 / A335M TABLE 2 Heat Treatment Requirements A

ASTM A335 P21 Alloy Steel Pipe Permissible Variations in Outside Diameter

Sources American Standard A335 / A335M TABLE 7 Permissible Variations in Outside Diameter

ASTM A335 P21 Alloy Steel Pipe Permitted Variations in Wall Thickness

Sources American Standard A335 / A335M TABLE 8 Permitted Variations in Wall Thickness

ASTM A335 P21 Alloy Steel Pipe Manufacturing Proces

ASTM A335 P21 Alloy Steel Pipe Application

• Hydrogen Service in Petroleum Refineries
• High-Temperature Steam Lines
• Petrochemical Process Reactors & Vessels
• Heat Exchanger Tubing for Severe Service
• Transfer Lines in Refinery Units

ASTM A335 P21 Alloy Steel Pipe Packing & Loading

a. 1/2"-2"Plain end with black oil paint, caps both ends, bundles with loading belt.

b. 2"-4"Beveled end with black oil paint, caps both ends, bundles with loading belt.

c. 10"-20"Beveled end with black oil paint, caps both ends, loose packed in to container.

→Alloy Steel Pipes is transported in containers

Jinxi Steel, a professional manufacturer of steel pipes and fittings, is located in Changsha City. Guided by the scientific development concept, Jinxi Steel will comprehensively reform and develop, adhere to the path of quality and efficiency under the guidance of science and technology, persist in disruptive development, implement a strategy of focusing on Central China and developing Southwest China, strive to achieve a production scale of over 10 million tons and annual sales revenue of over 30 billion yuan, and join the ranks of the world's top 500 steel enterprises.

Jinxi Steel enjoys a superior geographical location and convenient transportation, possessing spacious modern plants and multiple steel pipe and fitting manufacturing plants. The company specializes in the production of high-tech, high-value-added steel. Meanwhile, Jinxi Steel has become a major steel supplier for industries such as automobiles, home appliances, containers, oil and gas exploration, and pressure vessels, exporting its products to more than 40 countries and regions in the Middle East, South America, Europe, Africa, and Asia.

Storing 200,000 tons of various steel products in a 500,000-square-meter warehouse, we have built first-class seamless steel pipe, high-frequency welding, and submerged arc welding hot rolling and cold drawing production lines. The company consistently adheres to standards from authoritative organizations such as GB, ASTM, DIN, JIS, and ISO. Annual production of seamless and welded steel pipes of various standards reaches 500,000 tons. Our products are widely used in industries such as petroleum, chemical, pharmaceutical, papermaking, shipbuilding, food, nuclear power, and ammunition. Furthermore, we employ various testing methods to inspect finished products, including eddy current testing, ultrasonic testing, and spectral analysis. In addition, we have obtained ISO9001:2008, SGS, BV, RINA, and ISO14001:2004 certifications, ensuring the high quality of our products.