ASTM E890-94(R2021) pdf free download

ASTM E890-94(R2021) pdf free download.Standard Specification for Disposable Glass Culture Tubes
1. Scope
1.1 This specification covers the requirements for dispos- able glass tubes suitable for general testing and culturing applications in blood banks, hematology, bacteriology, virology, and tissue culture laboratories. 1.2 For practical purposes, the word “disposable” according to this specification and expected product performance ex- pressed in this specification describes those disposable glass culture tubes that are to be used one time only. Any institution or individual who reuses a disposable glass culture tube must bear full responsibility for its safety and effectiveness. 1.3 For packaging standards, choose among the following: Specifications E920 or E921 or Practice E1133. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Materials
3.1 The disposable glass culture tubes shall be made ofglass in accordance with the requirements of Type I, Class A or B (borosilicate glass) or Type II (soda-lime glass) of Specifica- tion E438.
4. Design
4.1 The tubes shall be of one-piece construction in accor- dance with Fig. 1 for shape, and any cross section of the tube, taken in a plane perpendicular to the longitudinal axis, shall preferably be circular. 4.2 The top or open end of the tube shall be smoothly fire-polished at right angles to the horizontal axis of the tube. 4.3 The bottom or closed end ofthe tube shall be completely closed and shall have a spherical radius inside and outside in accordance with Fig. 1. The wall thickness in the bottom shall be at least 66 2 ⁄ 3 % of the side wall thickness, but not more than 210 % of the side wall thickness. 4.4 Residual thermal stress shall not exceed 750 psi when determined in accordance with Specification E671. 4.5 Workmanship—The glass tube shall be free of defects that impair serviceability. The glass tube shall be transparent, clean, dry, and reasonably free of foreign material, loose or embedded, lint, or stains when viewed under normal room lighting with the unaided eye. 4.6 Dimensions—The glass tubes shall be in accordance with the dimensions given in Table 1.