ISO 3807:2013 download free

06-30-2021 comment

ISO 3807:2013 download free.Gas cylinders-Acetylene cylinders Basic requirements and type testing.
There are two types of acetylene cylinders operated in certain parts of the world:
— acetylene cylinders with a test pressure of at least 60 bar and without fusible plugs;
— acetylene cyl nders with a test pressure of at least 52 bar, fitted with fusible plugs which release the gas and hence reduce the pressure if the cylinder temperature increases unintentionally.
ISO 3807 covers the requirements for both types of acetylene cylinders and specifies specific requirements in separate Annexes.
ISO 3807 Is Intended to be used under a variety olnatlonal regulatory regimes but has been written so that it is suitable for the application of the UN Model Regulations ill. Attention is drawn to requirements in the specified relevant national regulations of the country (countries) where Tue cylinders are intended to be used that might override the requirements given in ISO 3807.
in Internationsi Standards, weight is equivalent to a force, expressed in Newton. However, in common parlance (as used in terms defined in ISO 3807), the word weight continues to be used to mean “mass, even though this practice is deprecated (ISO 80000-4)
In ISO 3807 the unit bar is used, due to its universal use In the Held of technical gases. It should, however, be noted that bar is not an SI unit, and that the according SI unit for pressure Is Pa.
Pressure values given in ISO 3807 are given as gauge pressure (pressure exceeding atmospheric pressure) unless noted otherwise.
ISO 3807 specifics the basic and typo testing requirements foracetylene cylinders with and without rusibic plugs with a maximum nominal water capacity of 150 land requirements regarding production/batch test procedures for manufacturing of acetylene cylinders with porous material.
It does not include details of the design of the cylinder shell: these are specified, for example, In
ISO 9809-1. ISO 9809-3. ISO 4706 and ISO 7866.
NOTE The limitation to 154)1 is derived from thedelinition rorcylinder in 11w UN Model Regulations, However, in practice acetylene cylinders in general have lower water capacities than 1501.
2 Normative references
The following referenced documents are indispensable [or the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 10297. Gas cylinders — Cylinder valves — Specification and type testing
3 Terms and definItions
For the purposes of this document, the following terms and definitions apply.
acetylene cylinder
cylinder, manufactured and suitable for the transport of acetylene, containing a porous material (3.6) and solvent (3,9) (where applicable) for acetylene with a valve and other accessories affixed to the cylinder
Note ito entry: For solvent-free acetylene cylinders. see Clause 7.
Note 2 to entry: When there is no risk ofambiguity the word cyllndcr is used
cylinder shell
‘cacetylene cylinders> empty cylinder, manufactured and suitable for receiving and containing a porous material (3j,) for use as part of an acetylene cylinder (31)
fusible plug
non.reclosing pressure relief device designed to function by the yielding or melting of a plug of fusible material at a predetermined temperature
‘cacetylene cylinders> company responsible for filling the cylinder shell (3.2) with porous materIal (3.6) and which generally prepares it for the first charge olacetylene
The compressive strength as determined in accordance with AnnexU shall beat least 2 MPa (20 bar).
For safety reasons, the porous material shall be able to prevent the propagation or an acetylene decomposition within the cylinder and shall be of such quality that It enables the acetylene cylinder to meet the requirements olAnnex 0 and Annex E.
Acetylene cylinders equipped with fusible plugs shall pass the fire test described in Annex! in addition. Where cylinder shells with joggle welds are used, it shall be verified that the welds do not damage the porous material in accordance with Annex G.
To ensure the quality and uniform distribution of the porous material in the acetylene cylinder and the quality and amount of the solvent, test procedures shall be established by the manufacturer of the porous material In accordance with Annex I.
4.3 Solvent content and acetylene content
The solvent shall be compatible with the cylinder shell. For the commonly used solvents acetone and DMF this is generally the case.
The specified solvent content and the maximum acetylene content for an acetylene cylinder shall be such that the cylinder will meet the requirements specified in AnnexD and Annex E.
The specified solvent content and the maximum acetylene content loran acetylene cylinder equipped with fusible plugs shall be such that the cylinder will meet the requirements specified In Annex Fin addition.
4.4 Working pressure
When the cylinder has been filled with the specified solvent content and the maximum acetylene content. and the pressure has reached equilibrium at a uniform reference temperature of 15°C, the gauge pressure in the cylinder shall not exceed the working pressure as calculated in accordance with Annex C.
4.5 Cylinder Identification
For the stamp marking of acetylene cylinders see the relevant regulations. Further information can be found in Iso 13769.
In addition, solvent free acetylene cylinders shall bear the words solvent-lree painted In a clear and visible manner.
NOTE Attention is drawn to requirements for marking in relevant regulations that might override the requirements given in ISO 3807.
4.6 Fusible plugs
For acetylene cylinders equipped with fusible plugs, the fusible plugs shall be sized and selected as to location and quantity so that the fusible plug(s) are capable of preventing bursting of the normally filled cylinder when subjected to a fire test In accordance with Annex F.
The fusible plug shall utilize a fusible alloy having a yield temperature between 98 °C and 110 C. The yield temperature is the temperature at which the fusible alloy becomes sufficiently soft to extrude from its holder to permit discharge of acetylene.
The fusible alloy may be installed in a threaded steel or brass plug. The threaded plug shall be Fitted into a boss or pad, preferably on the cylinder top or In the cylinder valve. 8ottom plugs are not permitted for cylinders used In bundles.
The fusible plugs shall be sample tested for yield temperature and for resistance to extrusion and leakage as a quality control procedure during manufacture and prior to installation into the cylinder in accordance with Annexil.

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