ISO 4788:2005 pdf download.Laboratory glassware - Graduated measuring cylinders.
8 Material
The cylmders shall be manufactured from glass of hydrolytic class not lower than HGB3 In accordance with ISO 719. The glass shall be as free as possible from visible defects, and steps shall be taken in manufacture to ensure that it is reasonably free from internal stress.
9 Construction and form
9.1 Wall thickness
The cylinders shall be sufficiently robust In construction to withstand usual laboratory usage, and the wall
thickness shall show no gross departure from uniformity.
9.2 Stability
The cylinders shall stand vertically without rocking or spinning when placed on a level surface They shall not topple when placed empty (without stopper, if provided) on a surface inclined at an angle of 15° to the horizontal.
9.3 Base
The base may be integral, of glass, or it may be detachable, & a suitable plastics or other material, and may be either hexagonal a of other form provided the cylinder satisfies the requirements of 9.2.
9.4 RIm and spout
9.4.1 The rim of the cylinder shall be fire-polished and shall lie in a plane at right angles to the axis of the cylinder.
9.4.2 The spout of a Type la spouted cylinder shall be so famed as to enable the contents of the cylinder to be poured out in a narrow stream without spilling or running down the outside of the cylinder.
9.5 Neck and stopper
On a Type lb stoppered cylinder, the neck shall be ground to a suitable socket size, preferably selected from
ISO 383.
A well-fitting stopper of glass a suitable inert plastics material shall be supplied. If individually ground stoppers are supplied, each stopper, and the cylinder it fits, shall be marked with an identification number.
9.6 DimensIons
Type 1 (a and b) cylrders shall comply with the dimensional requirements even in Table 1. In the case of a stoppered cylinder, the overall height” shall be considered to be the height to the base of the ground neck (see Figure 1, Type ib).
Type 2 cylinders shall comply with the dimensional requirements given in Table 2.
The cylmders shall be manufactured from glass of hydrolytic class not lower than HGB3 In accordance with ISO 719. The glass shall be as free as possible from visible defects, and steps shall be taken in manufacture to ensure that it is reasonably free from internal stress.
9 Construction and form
9.1 Wall thickness
The cylinders shall be sufficiently robust In construction to withstand usual laboratory usage, and the wall
thickness shall show no gross departure from uniformity.
9.2 Stability
The cylinders shall stand vertically without rocking or spinning when placed on a level surface They shall not topple when placed empty (without stopper, if provided) on a surface inclined at an angle of 15° to the horizontal.
9.3 Base
The base may be integral, of glass, or it may be detachable, & a suitable plastics or other material, and may be either hexagonal a of other form provided the cylinder satisfies the requirements of 9.2.
9.4 RIm and spout
9.4.1 The rim of the cylinder shall be fire-polished and shall lie in a plane at right angles to the axis of the cylinder.
9.4.2 The spout of a Type la spouted cylinder shall be so famed as to enable the contents of the cylinder to be poured out in a narrow stream without spilling or running down the outside of the cylinder.
9.5 Neck and stopper
On a Type lb stoppered cylinder, the neck shall be ground to a suitable socket size, preferably selected from
ISO 383.
A well-fitting stopper of glass a suitable inert plastics material shall be supplied. If individually ground stoppers are supplied, each stopper, and the cylinder it fits, shall be marked with an identification number.
9.6 DimensIons
Type 1 (a and b) cylrders shall comply with the dimensional requirements even in Table 1. In the case of a stoppered cylinder, the overall height” shall be considered to be the height to the base of the ground neck (see Figure 1, Type ib).
Type 2 cylinders shall comply with the dimensional requirements given in Table 2.
