Pressure relief requirements are as indicated in 6.6.2.8.3 to prevent crystallization of the product in the pressure relief valve.

The capacity and start to discharge pressure of the relief valves shall be based on the results of the tests specified in 4.2.1.13.1.

The pressure relief devices shall be of a type that will resist dynamic forces including liquid surge.

The pressure relief devices shall be of the type that will resist dynamic forces including surge.

B. Staff stress and security

6.6.2.8.5 When the shell is fitted for pressure discharge, the inlet line shall be provided with a suitable pressure relief device set to operate at a pressure not higher than the MAWP of the shell, and a stop valve shall be fitted as close to the shell as reasonably practicable.

(a) Each plug or valve shall have a taper threaded connection directly to the pressure receptacle and be capable of withstanding the test pressure of the pressure receptacle without damage or leakage

4.2.1.13.7 The pressure relief devices shall consist of spring loaded valves fitted to prevent significant build up within the portable tank of the decomposition products and vapours released at a temperature of 50 oC.

Other openings, except for openings leading to venting or pressure relief devices, shall be equipped with either a stop valve or another suitable means of closure located as close to the shell as reasonably practicable.

Pressure relief requir ements

opening require ments Pressure

A. Review of Staff Stress and Security

4.2.1.13.10 Vacuum relief devices and spring loaded valves shall be provided with flame arresters.

Each pressure receptacle with a wall thickness at any point of less than 2.0 mm and each pressure receptacle that does not have fitted valve protection shall be transported in an outer packaging.

No stop valve shall be installed between the shell and the pressure relief devices except when duplicate devices are provided for maintenance or other reasons and the stop valves serving the devices actually in use are locked open or the stop valves are interlocked so that the requirements of 6.6.4.7 are always fulfilled.

Pressure relief

Surely, any explanation must include the global constriction of credit, especially for small and medium size businesses. Tighter regulation of lending standards has shut out an important source of global investment demand, putting downward pressure on interest rates.

6.6.2.7 Safety relief devices

Urgency overrides security?

19. The Ariane 5 orbiter will also be rendered passive at the end of its mission through the opening of two pyrotechnic valves fitted on the pressurization circuit, connected to zero torque nozzles.

Staff stress and security a management challenge for UNHCR

The top of the tank is provided with either a 1 mm opening which simulates the pressure relief valve (PRV) of the IBC or tank or a real PRV of a diameter which is scaled using the vent area to vessel volume ratio.

6.6.4.5.9 When pressure building units are used, the liquid and vapour connections to that unit shall be provided with a valve as close to the jacket as reasonably practicable to prevent the loss of contents in case of damage to the pressure building unit.

Fear and insecurity and public pressure to respond to crime

No stop valve shall be installed between the shell and the pressure relief devices except where duplicate devices are provided for maintenance or other reasons and the stop valves serving the devices actually in use are locked open or the stop valves are interlocked so that at least one of the duplicate devices is always in use.

Possible, but unsafe

A study of history confirms the validity of the Big Hunt theory... it is mankind's safety valve.

(d) The materials of construction for the pressure receptacle, valves, plugs, outlet caps, luting and gaskets shall be compatible with each other and with the lading.

From 2002 to 2004, powerful commanders and their militias, dominated the security environment. Narcotics trade and related criminal activities also expanded rapidly.

It is expected that the evaluation will continue to influence action on security and stress issues throughout 1998.

Alternatively, pressurants can be removed with the use of special venting lines and pyrotechnical valves.

Vacuum relief devices, when used, shall have a cross sectional flow area not less than 284 mm2.

No stop valve shall be installed between the shell and the pressure relief devices except when duplicate devices are provided for maintenance or other reasons and the stop valves serving the devices actually in use are locked open or the stop valves are interlocked so that at least one of the duplicate devices is always operable and capable of meeting the requirements of 6.6.3.8.

In addition, under enormous pressure, concepts such as the responsibility to protect and human security have been included.

(b) Each valve shall be of the packless type with non perforated diaphragm, except that, for corrosive materials, a valve may be of the packed type with an assembly made gas tight by means of a seal cap with gasket joint attached to the valve body or the pressure receptacle to prevent loss of material through or past the packing

The periodic inspection shall include an external examination, an internal examination or alternative method as approved by the competent authority, a pressure test or equivalent effective non destructive testing with the agreement of the competent authority including an inspection of all accessories (e.g. tightness of valves, emergency relief valves of fusible elements).

Connections and accessories leading to or from such a valve shall have a capacity for a flow more than the rated flow of the excess flow valve.

The start to discharge pressure shall, however, in no case be such that liquid would escape from the valve(s) if the portable tank were overturned.

Here, I mean effectiveness in the sense that the collective pressure to adhere to Security Council decisions will increase.

Regional workshops and seminars will be conducted on security and safety issues, including on stress management.

6.6.3.5.2 All openings with a diameter of more than 1.5 mm in shells of portable tanks, except openings for pressure relief devices, inspection openings and closed bleed holes, shall be fitted with at least three mutually independent shut off devices in series, the first being an internal stop valve, excess flow valve or equivalent device, the second being an external stop valve and the third being a blank flange or equivalent device.

As the activities of armed opposition groups adapt and change in reaction to political and security force pressures, the acquisition and production of quality security information and analysis becomes increasingly important.

3353 AIR BAG INFLATORS, COMPRESSED 2.2 280 GAS or AIR BAG MODULES, COMPRESSED GAS or SEAT BELT PRETENSIONERS, COMPRESSED GAS

Emergency pressure relief devices may be used to achieve the full relief capacity prescribed.

Pressure relief devices shall operate at pressures determined according to both the properties of the organic peroxide and the construction characteristics of the portable tank.