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  • ASTM
    B891-12 Standard Specification for Seamless and Welded Titanium and Titanium Alloy Condenser and Heat Exchanger Tubes with Enhanced Surface for Improved Heat Transfer (Redline)
    Edition: 2012
    $72.38
    Unlimited Users per year

Description of ASTM-B891 2012

ASTM B891 - 12

Standard Specification for Seamless and Welded Titanium and Titanium Alloy Condenser and Heat Exchanger Tubes with Enhanced Surface for Improved Heat Transfer

Active Standard ASTM B891 | Developed by Subcommittee: B10.01

Book of Standards Volume: 02.04




ASTM B891

Abstract

This specification covers seamless and welded titanium and titanium alloy tubing on which the external or internal surface, or both, has been modified by a cold forming process to produce an integral enhanced surface for improved heat transfer. The tubes are used in surface condensers, evaporators, heat exchangers and similar heat transfer apparatus in unfinned end diameters of a specific size. Tubes shall be furnished with unenhanced ends in the annealed condition and shall be suitable for rolling-in operations. Each tube shall be subject to a nondestructive eddy current test, and either a pneumatic or hydrostatic test.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers seamless and welded titanium and titanium alloy tubing on which at least part of the external or internal surface has been enhanced by cold forming for improved heat transfer. The tubes are used in surface condensers, evaporators, heat exchangers, coils, and similar heat transfer apparatus in diameters up to and including 1 in. (25.4 mm). The base tube wall thickness is typically at least 0.049 in. average, but lighter gauge may be negotiated with the manufacturer.

1.2 Tubing purchased to this specification will typically be inserted through close-fitting holes in tubesheets, baffles, or support plates spaced along the tube length such as defined in the Tubular Exchanger Manufacturer s Association (TEMA) Standard. The tube ends will also be expanded, and may then be welded. Tube may also be bent to form U-tubes or be coiled or otherwise formed, although tight radii may require unenhanced length for the bends.

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4 The following precautionary statement pertains to the test method portion only: Section 8, 9, 10 and S1 of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

A1047/A1047M Test Method for Pneumatic Leak Testing of Tubing

B338 Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers

E426 Practice for Electromagnetic (Eddy-Current) Examination of Seamless and Welded Tubular Products, Austenitic Stainless Steel and Similar Alloys

E1316 Terminology for Nondestructive Examinations


Keywords

condenser; enhanced tube; evaporator; finned tube; heat exchanger; heat transfer; integral fins; ribbed tube; seamless; titanium; titanium alloy; tube; U-bend; welded; Condenser and heat exchanger systems--titanium/titanium alloy; Integral fins; Seamless/welded titanium tube; Titanium alloy pipe/tube--specifications; Titanium (Ti)/alloys--specifications; Welded Ti/Ti alloy--specifications


ICS Code

ICS Number Code 27.060.30 (Boilers and heat exchangers)


DOI: 10.1520/B0891-12

ASTM International is a member of CrossRef.

ASTM B891

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