What is a detonating cord?
DETONATING CORD Detonating cord is a universal high explosive used for a wide variety of applications to create explosive effects and build reliable charges. It is initiated with military or commercial detonators and detonates along its entire length at 6,400 m/s.
What is detcord made of?
Detonating cord (also called detonation cord, detacord, det. cord, detcord, primer cord or sun cord) is a thin, flexible plastic tube usually filled with pentaerythritol tetranitrate (PETN, pentrite). With the PETN exploding at a rate of approximately 6400 m/s, any common length of detonation cord appears to explode instantaneously.
What is a 50 grain detonating cord?
Rating. For example, "50 grain det. cord" refers to detonating cord which has 50 grains of explosive per foot of length—or approximately 10 g/m. This is a typical "default" rating for connecting charges for blasting; lighter detonating cords may be used for "low noise blasting" and movie special effects, while heavier cords,...
What does detcord stand for?
Detonating cord (also called detonation cord, detacord, det. cord, detcord, primer cord or sun cord) is a thin, flexible plastic tube usually filled with pentaerythritol tetranitrate (PETN, pentrite). With the PETN exploding at a rate of approximately 6400 m/s, any common length of detonation cord appears...
How fast is det cord burn?
Detonating cord is a linear form of a high explosive. Unlike black powder, detonating cord contains a core of a very high-velocity explosive that detonates (rather than burns) at a speed of about four miles per second.
How many feet per second does det cord burn?
NONELECTRIC INITIATION WITH DETONATING CORD Velocity of detonation is generally given as 21,000 feet per second. It is important to remember that all standard precautions apply when blasting with detonating cord; this includes both lightning and the handling of misfires.
Is det cord explosive?
PRIMACORD det cords are flexible linear explosives with a core of PETN explosive encased in a textile outer jacket.
Can det cord set off c4?
A 25 or 50 gr/ft detonating cord detonates almost any cap sensitive explosives in contact with it, but will not reliably detonate a blasting agent.
How explosive is PETN?
PETN is a very powerful explosive material with a relative effectiveness factor of 1.66. When mixed with a plasticizer, PETN forms a plastic explosive. Along with RDX it is the main ingredient of Semtex.
What is the re factor of PETN?
1.66PETN (pentaerythritol tetranitrate, also known as pentrite, or rarely and primarily in German as nitropenta) is one of the most powerful high explosives known, with a relative effectiveness factor (R.E. factor) of 1.66.
Can you cut det cord?
Avoid loops, sharp kinks, or angles that direct the detonating cord back toward the oncoming line of detonation. Never attempt to cut detonating cord with a blow from a sharp or blunt object. Never saw detonating cord; it may explode and kill or injure.
How fast does a dynamite fuse burn?
The safety fuse burns at a rate of typically about 30 seconds per foot (1 second per cm).
Is PETN waterproof?
Pentex™ PowerPlus™ boosters contains a patented waterproof plastic bottle containing PETN (Pentaerythritol tetranitrate) explosive, allowing initiation by low charge weight detonating cords while delivering high Velocities of Detonation (VOD) to maximise performance.
How is det cord set off?
Detonating cord, also called Cordeau and Primacord, is a hollow cord filled with an explosive material. It is fired by a detonator and is capable of initiating the detonation of certain other explosives at any number of points and in any desired pattern.
What is in Semtex?
One of the well-known ternary PBXs, still from the period of Vietnam War, is Semtex 1H from the assortment of the Czech company Explosia. It is a high performance plastic explosive containing a mixture of RDX and PETN bonded by plasticized SBR rubber [25].
Why is HMX a good explosive?
Because of its high molecular weight, it is one of the most potent chemical explosives manufactured, although a number of newer ones, including HNIW and ONC, are more powerful.
Can you cut det cord?
Avoid loops, sharp kinks, or angles that direct the detonating cord back toward the oncoming line of detonation. Never attempt to cut detonating cord with a blow from a sharp or blunt object. Never saw detonating cord; it may explode and kill or injure.
What is in Semtex?
One of the well-known ternary PBXs, still from the period of Vietnam War, is Semtex 1H from the assortment of the Czech company Explosia. It is a high performance plastic explosive containing a mixture of RDX and PETN bonded by plasticized SBR rubber [25].
How is det cord used?
description. Detonating cord, also called Cordeau and Primacord, is a hollow cord filled with an explosive material. It is fired by a detonator and is capable of initiating the detonation of certain other explosives at any number of points and in any desired pattern.
What is the full form of HMX?
HMX is a man-made, colorless liquid chemical which stands for High Melting Explosive. HMX will dissolve slightly in water. A very small amount of HMX will turn into a vapor in the air.
Effects
As a transmission medium, it can act as a downline between the initiator (usually a trigger) and the blast area, and as a trunkline connecting several different explosive charges.
Rating
Detonating cord is rated in explosive mass per unit length. This is expressed in grains per foot in the United States, or in grams per metre elsewhere. A "grams per metre" rating will be roughly one fifth the "grains per foot" rating. For example, "50 grain det.
Direct employment
Low-yield detonating cord can be used as a precision cutting charge to remove cables, pipes, wiring, fiber optics, and other utility bundles by placing one or more complete wraps around the target. Detcord/Primacord is used in commercial boilers to break up clinkers (solidified coal ash slag) adhering to tube structures.
Colloquialisms
The Finnish army colloquialism for detonation cord is anopin pyykkinaru (mother-in-law's clothesline), as it resembles ordinary clothesline.
How to calculate net burn rate?
Net Burn Rate is the rate at which a company is losing money. It is calculated by subtracting its operating expenses from its revenue. It is also measured on a monthly basis. It shows how much cash a company needs to continue operating for a period of time. However, one factor that needs to be controlled is the variability in revenue#N#Revenue Run Rate Revenue Run Rate is an indicator of financial performance that takes a company's current revenue in a certain period (a week, month, quarter, etc.) and converts it to an annual figure get the full-year equivalent. This metric is often used by rapidly growing companies, as data that's even a few months old can understate the current size of the company. guide, example, formula#N#. A fall in revenue with no change in costs can lead to a higher burn rate.
What is the impact of a high burn rate?
It indicates that it is at a higher likelihood of entering a state of financial distress.
Why is it important to highlight the monthly burn rate?
for a startup or early-stage business, it’s important to highlight the monthly burn rate and the runway until the next financing is required. Early-stage businesses will often raise money in phases to fund different stages, so it’s important to highlight how long the company can last until it needs more money.
blasting
Detonating cord (detonating fuse) resembles safety fuse but contains a high explosive instead of black powder. The first successful one, patented in France in 1908, consisted of a lead tube, about the same diameter as safety fuse, filled with a core of TNT.…
description
Detonating cord, also called Cordeau and Primacord, is a hollow cord filled with an explosive material. It is fired by a detonator and is capable of initiating the detonation of certain other explosives at any number of points and in any desired pattern.
What is the detonation velocity of explosives?
Detonation velocity is the speed with which the detonation shock wave travels through the explosive. It is a key, directly measurable indicator of explosive performance, but depends on density which must always be specified, and may be too low if the test charge diameter is not large enough. Especially for little studied explosives there may be divergent published values due to charge diameter issues. In liquid explosives, like nitroglycerin, there may be two detonation velocities, one much higher than the other. The detonation velocity values presented here are typically for the highest practical density which maximizes achievable detonation velocity.
How many detonation velocities are there in liquid explosives?
In liquid explosives, like nitroglycerin, there may be two detonation velocities, one much higher than the other. The detonation velocity values presented here are typically for the highest practical density which maximizes achievable detonation velocity.
