ASTM E676

This specification covers the required properties of only the ground surfaces of interchangeable taper-ground joints used in laboratory and industrial equipment in full-length, medium length, short length, and international length grindings. It includes information on the testing method for the products. After testing, samples should conform to the required quality of surface finish, taper, and leakage for the specific joint size designation.

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 designations, dimensions, and tolerances for only the ground surfaces of interchangeable taper-ground joints for laboratory and industrial equipment in full-length, medium-length, short-length, and international-length (ISO K-6 series) grindings.

Note 1—The dimensions pertaining to full-length, medium-length, and short-length joints, other than for the tolerance on length of grind, were taken directly from the now obsolete Commercial Standard CS 21.

Note 2—Tolerances on the diameters of the international-length joints do not agree with those given in ISO Recommendation R383. These tolerances have been established to agree with those of CS 21 in order to prevent the negative projection (large end of inner joint being smaller than large end of outer joint) permitted by ISO.

Note 3—Although glass is the most commonly used material for ground joints, other materials may be used as specified. Taper-ground joints constructed from glass should be of suitable chemical and thermal properties in accordance with Specification E 438. Joints should be as free as possible of visible defects and conform to Specification E 671.

1.2 The following precautionary caveat pertains only to the Test Method portion, Section 4, 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

E1133 Practice for Performance Testing of Packaged Laboratory Apparatus for United States Government Procurements
E438 Specification for Glasses in Laboratory Apparatus
E671 Specification for Maximum Permissible Thermal Residual Stress in Annealed Glass Laboratory Apparatus
E920 Specification for Commercially Packaged Laboratory Apparatus
E921 Specification for Export Packaged Laboratory Apparatus
2.3
CS 21 Interchangeable Taper-Ground Joints, Stopcocks, Stoppers, and Spherical-Ground Joints
R383 Interchangeable Conical Ground Glass Joints

Index Terms

ground; joints; Ground joints (for laboratory use); Interchangeable ground laboratory apparatus--specifications; Joints--specifications; Laboratory apparatus--specifications; ICS Number Code 71.040.20

Citing ASTM Standards

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