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	Standard Specification for Seamless Carbon Steel Pipe For High Temperature Service

	This standard is issued under the fixed designation A106; the number immediately following the designation indicates the yesr of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript (€) indicates an editorial change since the last revision or reapproval. This specification has been approved for use of agencies by the Department of Defense & for listing in the DoD Index of Specifications & Standards.

	1. Scope
	1.1 This specification covers seamless carbon steel pipe for high-temperature service (Note 1) in NPS 1/8 to NPS 48 [DN 6 to DN 1200] (Note 2) inclusive, with nominal (average) wall thickness as given in ASME B 36.10M. Pipe having other dimensions may be furnished provided such pipe comlies with all other requirements of this specification. Pipe ordered under this specification shall be suitable for bending, flanging, and similar forming operations.

	1.2 Supplementary requirements of an optional nature are provided for seamless pipe intended for use in applications where a superior grade of pipe is required. These supplementary requirements call for additional tests to be made and when desired shall be so stated in the order.

	1.3 When these products are to be used in applications conforming to ISO Recommendations for Boiler Construction, the requirements of Specification A 520 (Section 2) shall supplement & supersede the requirements of this specification.

	1.4 The values stated in inch-pound units are to be regarded as the standard.
	Note 2 - The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”

	2. Applicable Documents
	2.1 ASTM Standards: A 520 Specification for Supplementary requirements for Seamless and Electric resistance Welded Carbon Steel Tubular products for High-Temperature Service Conforming to ISO recommendations for Boiler Construction A530 Specification for General Requirements for Specialized Carbon & Alloy Steel Pipe E381 Macroetech Testing, Inspection & Rating Steel Products, Comprising bars, Billets, Blooms & Forgings

	2.2 American National Standard ANSI B36.10, Wrought Steel and Wrought Iron Pipe

	2.3 Military Standard MIL – STD - 129 Marking for shipment and storange MIL – STD - 163 Steel Mill Products, Preparation for Shipment and Storage

	2.4 Federal Standard Fed. Std. No. 123 Marking Shipments (Civil Agencies)

	3. General Requirements
	3.1 Material furnished to this specification shall conform to the applicable requirements of the current edition of specification A 530 unless otherwise provided herein.

	4. Process
	4.1 The steel shall be killed steel made by one or more of the following processes: open-hearth, basic-oxygen, or electric-furnace. The primary melting may incorporate separate degassing or refining, and may be followed by secondary melting, using electro slag remelting or vacuum are remelting. If secondary melting is employed, the heat shall be defined as all of the ingots remelted from a single primary heat.

	4.2 Pipe NPS 1 ½ and under may be either hot finished or cold drawn.

	4.3 Unless otherwise specified, pipe NPS 2 and over shall be furnished hot finished. When agreed upon between the manufacturer and the purchaser, cold drawn pipe may be furnished.

	5. Ordering Information
	5.1 Order for materials under this specification shall include the following, as required to describe the desired material adequately: 5.1.1 Quantity (feet or number of lengths) 5.1.2 Name of material (seamless carbon steel pipe) 5.1.3 Grade (Table -1) 5.1.4 Manufacture (hot-finished, or cold- drawn) 5.1.5 Size (either NPS and weight class or schedule number, or both, or outside, diamerer and nominal wall thickness, ANSI B36 10) 5.1.6 Length (specific or random section 19) 5.1.7 Optional Requirements (section 9 and S1 to S6) 5.1.8 Test report required (Section 20 of specification A 530) 5.1.9 Specification number 5.1.10 End use of material 5.1.11 Hydrostatic test in accordance with 6.3 of specification A 530 or 13.2 of this specification and 5.1.12 Special requirements.

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