BS 3059-2 622-490 Standard Specification for Steel Boiler and Superheater Tubes Part 2. Carbon, Alloy and Austenitic Stainless Steel Tubes with Specified Elevated Temperature Properties, Boiler Steel Pipes, Boiler Steel Tubes, Superheater Tubes, High Pressure Steel Pipes, Boiler Pipes, HRSG Pipe

BS 3059 Standard Specification for Steel Boiler and Superheater Tubes Part 2. Carbon, Alloy and Austenitic Stainless Steel Tubes with Specified Elevated Temperature Properties

Standard: BS 3059-2
Equivalent Standards: EN 10216-2, DIN 17175, NF A 49-213, NBR 5594, GB 3087, GB 5310, JIS G3461

Material: 622-490
Equivalent Materials: 10CrMo910, 1.7380, 10CrMo9-10, T22, P22, TU 10 CD 9-10

Chemistry Composition

C, %	Mn, %	Si, %	P, %	S, %	Cr, %	Mo, %
0.08-0.15	0.40-0.70	0.50 max	0.030 max	0.030 max	2.00-2.50	0.90-1.20

Mechanical Properties

Tensile Strength , MPa	Yield Strength , MPa	Elongation, %
490-640	275 min	20 min

Outside Diameter & Tolerance

Type	Outside Diameter, mm	Tolerance, mm
Seamless class 1 (S1)	OD≤127	±0.50% or min ±0.10
Seamless class 2 (S2)	OD≤127	±0.75% or min ±0.30

Wall thickness & Tolerance

Type	Outside Diameter, mm	Tolerance, %
Seamless class 1 (S1)	OD≤127	±7.5
Seamless class 2 (S2)	OD≤127	±10.0

BS 3059-2 specifies requirements for plain end, seamless and welded, carbon and alloy steel tubes and for cold finished seamless austenitic steel tubes, not exceeding 127mm outside diameter and not exceeding 12.5mm thickness for use in boilers and superheaters. Tubes manufactured in accordance with BS 3059-2 have specified room temperature properties and specified proof stress values at elevated temperatures.

Manufacture: the tubes made by cold drawn process.
Heat Treatment: the tubes are heat treated by normalized temperature 900-960°C, and tempering temperature 680-750°C.
Delivery Condition: black or nitrogen protection.
Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, NDT, surface inspection and dimension check.

Length: 5800mm; 6000mm; 6096mm; 7315mm; 11800mm; and so on.
Max length: 30000mm, U bending can be offered, also see the fin tubes.

Download BS 3059-2 622-490 Product Manual

Keyword: boiler steel pipes, superheater tubes, BS 3059-2

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