ASME SA213 Seamless T22 Carbon Alloy Steel Boiler Tubes
ASME SA213 Seamless T22 Carbon Alloy Steel Boiler Tubes
YUHONG Group offers ASME SA213 T22 SMLS carbon Alloy steel tubes which generally are used for heat exchanger and superheater, boilers.
This specification covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes.
In the Cr-Mo steel series, its thermal strength is relatively high, and its durable strength and allowable stress at the same temperature are even higher than 9Cr-1Mo steel, so it has been used widely in foreign thermal power, nuclear power and pressure vessels. The steel is not sensitive to heat treatment, has high permanent plasticity and good welding performance. T22 small-diameter tubes are mainly used as heating surface tubes for superheaters and reheaters with metal wall temperatures below 580 °C, and T22 large-diameter tubes are mainly used for superheater/reheater joints with metal wall temperatures not exceeding 565 °C. tank and main steam piping.
Specifications
| Standard | ASME SA213 | ||||
| Name of Material | Seamless Tubes | ||||
| Keywordas | Heat exchanger tubes; Hightemperature applications; Seamless steel tubes; Superheater tubes; Temperature service applications-high | ||||
| Condition | Hot Finished / Cold Finished | ||||
| Quantity | Feet,metres,or number of lengths | ||||
| Size | OD:1/8 to 5 in. (3.2 to 127mm) and WT Min/Avg. :0.015 to 0.5 in.(0.4 to 12.7mm) | ||||
| Length | Specific or random | ||||
| Heat Treat Type | Normalize and Tempher:1250°F [675°C] | ||||
Tubes, when inserted in a boiler or tube sheet, shall stand expanding and beading without showing cracks or flaws. Superheater tubes when properly manipulated shall stand all forging, welding, and bending operations necessary for application without developing defects.
Test Required
Tension Test / Flattening Test / Flaring Test / Hardness Test / Hydrostatic Test / Nondestructive Electric Test
Chemical Composition % T22/UNS K21590
| Carbon | Manganese | Phosphorus,Max | Sulfur,Max | Silicon | Chromium | Molybdenum |
| 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 | 1.90-2.60 | 0.87-1.13 |
Mechanical Property
| Steel Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) |
| SA213 | 205min | 415 min | 30 min |
Hardness Requirements
Rockwell Hardness Number HRB----85
Applications Industry
Condensers & Boiler Pharmaceuticals
Chemical Equipment Power Generation
Sea Water Equipment Petrochemicals
Heat Exchangers Gas Processing
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