GB/T 21539-2008 (English Version) PDF

Standard No.: GB/T 21539-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21539-2008

Scope: This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation and storage of polyurethane pistons for concrete pumps (hereinafter referred to as pistons). This standard applies to polyurethane pistons used in various types of concrete delivery pumps.

GB/T 21539-2008 Referenced Document

GB/T 1689-1998 Rubber vulcanized--Determination of abrasion resistance (Akron machine)
GB/T 3672.1 Rubber-Tolerances of products--Part 1: Dimensional tolerances
GB/T 528-1998 Rubber, vulcanized or thermoplastic--Determination of tensile stress-strain properties
GB/T 529-1999 Rubber, vulcanized or thermoplastic--Determination of tear strength (Trouser, angle and crescent test pieces)
GB/T 531-1999 Rubber--Determination of indentation hardness by means of pocket hardness meters
GB/T 5721 General rules of identification,packaging,transportation and storage for rubber sealing products