Power presses testing

I hereby certify that on I thoroughly examined and tested the power press and the... 

Before a power press is put into service for the first time, it must be thoroughly examined and tested by a competent person to ensure the press and its safeguards are installed safely and are safe to operate. The competent person needs to have enough practical or theoretical knowledge and experience to detect defects or weaknesses and assess how these will affect safe operation. 

Every power press must be thoroughly examined and tested by a competent person before being put into use, thereafter every 12 months for presses with fixed fencing or 6 months for other presses. Safety devices other than fixed fencing to be examined on installation and then every six months. A report of every examination and test on an approved form to be completed within 14 days. 

Health and Safety Executive, Guidance Note No. PM 79, Power presses Thorough examination and testing, HSE Books, Sudbury (1995)... 

ASME Power Test Code, PTC 19.11, ASME, New York, 1974 (revision in press). 

With regard to pro pints, brisance, power and detonation velocity are not tested. It is, however, necessary to determine the burning rate, press developed on burning, vol of gas evolved, calorific value, thermal stability, etc. If one is... 

The 70/30 mixt had Expln Temp 237-46° Brisance by Sand Test 102% TNT Power by Ballistic Mortar 109% TNT Rifle Bullet Test 20% detonations and Impact Sensitivity by PicArsn Test 12.5 inches (TNT 14). It was reported to be toxic, not very stable, and reactive with metals in the presence of moisture. Used pressed by Army and Navy as an Auxiliary Booster in some Bombs and Shells (Ref 1, pp 31 32 and Ref 5, p 365)... 

Shoeiyaku. Pentaerythritol Tetranitrate (PETN), C(CH2ON02)4 mw 316.14, N 17.72% wh crysts, d 1.77, mp 141° Brisance by Plate Dent Test 129% TNT Explosion Temperature 225° (decomp in 5 secs) Impact Sensitivity BurMines-App, 2-kg Wt 17cm (vs 100+ for TNT) Power by Ballistic Mortar Test 145% TNT Rate of Detonation 8300m/sec (Ref 8, p 276). Pressed PETN was used in Army 7.7 12.7-mm Fuzeless Projectiles and 20-mm MG Projs. Also in Boosters. Its mixt with TNT is called Pentoriru (qv). PETN with 8.5% wax was used for loading 20-mm Shells. Its mixtures with RDX were used in 7.7 12.7-mm Projectiles. PETN was also used in Incendiary Mixtures (Ref 1, p 27 Ref 5, p 372)... 

Impact Sensitivity — less sensitive than PA and TNT FI 120% PA. French test with 10kg weight (mouton) gave at the height of drop 2.50 meters, 50% detonations Initiation Sensitivity — 50g sample pressed to sp gr 1.23 in a paper cylinder 30mm diam required 2g MF for its detonation Power (Strength) — si more powerful than TNT, but less powerful than EDNA. Ballistic Mortar... 

Anon, EngrgDesHndbk, Fuzes, Proximity, Electrical, Part Five (U) , DARCOM-P-706-215(0 (no date) [Discusses fuze testing and various types of power sources used in the design of safing and arming devices] 6) R.B. Baldwin, The Deadly Fuze—The Secret Weapon of World War II , Presidio Press, San Rafael,... 

Clark reports experiments with diazodinitrophenol, mercury fulminate, and lead azide in which various weights of the explosives were introduced into No. 8 detonator capsules, pressed under reenforcing caps at 3400 pounds per square inch, and fired in the No. 2 sand test bomb. His results, tabulated below, show that diazodinitrophenol is much more powerful than mercury fulminate and lead azide. Other experiments by Clark showed... 

Propulsive Force. According to L.V.Clark, IEC 25, 1388(1933), the relative propulsive force can be detd either by ballistic pendulum test or by Trauzl test, the usual tests lor detn of power of explosives Quickness(Vivocite/, in Fr) of Burning of Propellonts, Determination is described by H.Muraour, "Poudres et Explo si fs. Presses Universitaires de France, Paris(lp47),90—92, as well as in his other papers nuKI ichwj in MP and MAF... 

Primers of pressed tetryl are used for initiating charges of explosives. A factor affecting their initiating power is their density. For a certain purpose it was desirable that the density of the primers should exceed 1.4g/cm3. A scheme was required so that a decision whether to accept the batch as satisfactory or reject it because the average density was too low could be based on the results obtained from testing a fairly small randomly drawn sample of primers from the batch. The standard deviation was known from past experience to be 0.03 and the mean density when the presses were operating normally was 1.54. 

Properties Bright-yellow crystals or amorphous powder or granules. Sp. gr. 1.63. Explodes when heated to a temperature of 180°. Less sensitive to impact than either lead azide or mercury fulminate, much less sensitive to friction than the latter, and does not get dead-pressed. Cannot be detonated under water with a No. 8 electric detonator. The strength (sand-bomb test) is about, twice that of mercury fulminate or lead azide. The initiating power is greater than... 

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