ALLUMINIUM SUPER PLAIN DETONATORS (NO. 8 STRENGTH)
ALUMINIUM SUPER INSTANTANEOUS ELECTRIC DETONATOR (NO.8 STRENGTH)
ALUMINIUM SUPER MILLISECOND DELAY ELECTRIC DETONATOR (DELAY NO.0 TO 10)
SRIDET
SUPER RELAYS-- 25ms , 50ms
INSTANTANEOUS COPPER ELECTRIC DETONATOR NO.8 STRENGTH
SUPER COAL DELAY DETONATOR -- DELAY NO.0 TO 6

1. ALLUMINIUM SUPER PLAIN DETONATORS (NO. 8 STRENGTH)

A super plain Detanator consists of an Aluminium shell (OD 7.2mm) filled with PETN as base charge and ASA as initiating primary charge. The plain Detanators are initiated with safety fuse. Once the safety fuse is crimped to the shell and fired, the spit of fire from the safety fuse initiates the primary charge ASA which then detonates the base charge PETN. This in turn will initiate the high explosive like ANFO, Catridge Explosives and Emulsion Explosives.

PRODUCT SPECIFICATIONS :

A.	Shell Material	Aluminium
B.	Shell length	42mm
C.	Strength	No.8
D.	Outer diameter	7.2 mm
E.	Quantity of PETN	60 cgs
F.	Packing (nos./box)	10,000 nos.
G.	Packing box material	Wooden
H.	Net weight	25 kgs
I.	Gross weight	30 kgs
J.	Box dimensions	540 x 400 x 320 mm ; 0.069 CBM

PACKING :

100 nos. of Aluminium Super Plain Detanators will be packed in laminated card board carton. 5 cartons are wrapped with craft paper and forms like a bundle. 20 such bundles will be kept in a double walled wooden cases.

APPLICATIONS :

The Super Plain Detanators along with safety fuse will be safe to handle at various hazardous locations like radio transmitters, high power cables, near heavy electrical machinery etc. They are more effective in dry holes. They can be used for boulder blasting, secondary blasting, safe initiation of quarry blasting, and in open blast and non-gassy underground mines.

  

2. ALUMINIUM SUPER INSTANTANEOUS ELECTRIC DETONATOR (NO.8 STRENGTH)

SGAE offers reliable means of initiation of explosive charge with the supply of No. 8 strength Instantaneous Electric Detanators. The Detanators consists of an Aluminium shell filled with PETN base charge and ASA initiating primary charge. The shell is crimped with an electrical fuse head. Each fuse head is checked for its electrical characteristics like fuse head resistance before, during and after crimping operations and thus provide a high and reliable initiation of the explosive charges. The leg wires of each Detanator is end twisted to arrest any unwarranted initiation of the fuse head with stray currents.

PRODUCT SPECIFICATIONS :

A.	Shell Material	Aluminium
B.	Shell length	42mm
C.	Strength	No.8
D.	Ledwire colour	Half white
E.	Ledwire material	Tinned steel wires
F.	Barewire diameter	For steel wire – 25.5SWG(0.46± 0.02mm)
G.	Ledwire resistance	For steel wire -0.75±0.10Ohms/Mtr.
H.	Standard Wire Lengths	1.5M, 1.8M, 3.0M,4.0M,4.5M. Specific lengths are available on reques
I.	Fuse-head Characteristics:-	I. Resistance : 1.6 to 2.0 Ohms II. Firing impulse : 3.2milliwatt secs per ohm. III. Minimum firing : 1.2 amperes DC current. IV.'No fire' current : 0.18 amps applied for 300seconds
J.	Packing per box	1500 nos. per box
K.	Case Dimensions	535 x 355 x 250 mm (external); 0.047 CBM

PACKING :

25 Detanators are made into a bundle and two such bundles are wrapped in kraft paper to make it into a packet. 30 such packets will be placed in a corrugated card board box.

APPLICATIONS :

The super Instantaneous Electric Detanators can be used in quarrying, opencast, boulder blasting, nongassy underground mines and many other types of blastings.

  

3. ALUMINIUM SUPER MILLISECOND DELAY ELECTRIC DETONATOR (DELAY NO.0 TO 10)

SGAE manufactures super delay electric Detanators of millisecond and half second categories.
These Detanators consists of Aluminium shell with PETN base charge and ASA initiating primary charge. The delay timing will come due to placement of delay element on top of the ASA. Delay Detanators are being used for various purposes like controlled blasting, tunneling, to reduce the charge per delay in the blast and to carryout bigger blasts. These delay Detanators are useful to control vibration, noise, air blast and fly rock. These are designed for use in opencast and underground metal mines, driving tunnels, shaft sinking etc.

ALUMINIUM SUPER ELECTRIC MILLISECOND DELAY DETONATORS :

Super Millisecond Delay Detanators are available from 0 to 10. The delay timings are from 0 to 400milliseonds with delay intervals of 25 millisecond from delay 1 to 6, 50 millisecond from delay 7 to 8 and 75 millisecond from 9 to 10.

All the delay Detanators are of same length 62mm with two stickers indicating the delay time, one at the crimping side and one at the end twisting side of the led wire.

On customer request we can supply delay timing up to 1000sec as and when required.

ALUMINIUM SUPER ELECTRIC HALF SECOND DELAY DETONATORS :

SGAE also manufactures and Supply Half Second Delay Detanators with delay no. from 0 to 6 i.e. from 0 to 3000 msec. with intervals of 500 msec.

The Supply Half Second Delay Detanators are suited for use in underground mining for driving shafts and tunnels, sinking shafts, stopping in metal mines, trenching and various blasting applications. The Long Delay Detanators provides sufficient time for the rock movement during the blast. In the tunneling operations, in combination with millisecond delay Detanators, these are used in the lifting holes and side holes to complete the tunnel formation and profile.

PACKING :

25 Delay Detanators are crimped and formed into a bundle. One such bundle is wrapped in a kraft paper. The required number of bundles will be kept in the fibre board cases depending on the length of the ledwire.

SPECIFICATIONS :

A.	Shell material	Aluminium
B.	Shell diameter	7.2mm
C.	Shell length/nominal time

Delay no.	Shell length(MM)	Nominal time(MS)	Nominal time (HS)
0.	62	Instantaneous	Instantaneous
1.	62	25	0.5 sec
2.	62	50	1.0 sec
3.	62	75	1.5 sec
4.	62	100	2.0 sec
5.	62	125	2.5 sec
6.	62	150	3.0 sec
7.	62	200
8.	62	250
9.	62	325
10.	62	400

D.	Bare wire diameter	Steel wire: 25.5 SWG (0.46±0.02mm)
E.	Ledwire colour	Half White
F.	Coated ledwire diameter	1.05±0.02mm
G.	Ledwire resistance	Steel wire: 0.75±0.10Ohms/Mtr
H.	Ledwire lengths	In standard lengths of 1.8,3.0,4.5M
I.	Fuse-head Characteristics	I. Resistance:1.6 to 2.0 Ohms II. Firing Impulse:3.2milliwatt secs/ohm III. Minimum Firing : 1.2amps DC Current IV. ‘No Fire’ current: 0.18amps applied in 300secs
J.	Packing cases	Fibre Board Boxes
K.	Packing per box:
	Ledwire length Quantity 1.8m 1500nos. 2.2m, 3.0m 1000 nos.

4. SRIDET

SGAE manufactures the Non Electric Initiating device which combines the versatility and advantages of Electric Detanators and Detonating Fuse knows as SRIDET.

SRIDET basically consists of a plastic tube carrying a very small quantity of explosive material on its inner surface coupled with a Delay Detonator shell. The Delay Detonator shell consists of 70cgs of PETN making it no 8* strength along with the initiating primary charges ASA and the required delay element.

When the Shock Tube is initiated, a low order shock wave with a velocity of 1900meters/sec passes through the tube and initiates the delay Detonator. The traveling shock wave is totally confined to the inner walls of the shock tube and no damage happens to the tube. The shock tube can be initiated either with a Detanator or with detonating fuse.

SGAE produces two types of SRIDETS

1. SRIDET for Coal India Limited applications.
2. SRIDET-C for Non Coal India Limited applications

The unique features of the SRIDET are

1. The shock tube is a co extruded double walled tube with thin coating of explosive charge
2. The explosive charge is highly reliable
3. The tube is oil resistant and moisture resistant
4. Simple and safe to handle and the user is not exposed to direct handling of any explosive material

SRIDETS are designed and developed for

a. Sequential firing
b. To reduce ground vibrations
c. To reduce charge per delay in sensitive areas
d. To provide the true bottom initiation in the blasts
e. To provide good fragmentation
f. Less flyrock
g. Less airblast
h. Maximum safety towards stray currents, leakage currents and air born static charges.

In each of the above variety, SGEA produces five different SRIDETS for various applications viz,

A. SRIDET DOWNLINE
B. SRIDET TOPLINE
C. SRIDET DOUBLE DET
D. SRIDET MILLISECOND DELAY DETONATORS
E. SRIDET HALF SECOND DELAY DETONATORS

A SRIDET DOWNLINE

SRIDET DOWNLINE has been developed for providing accurate and reliable down the hole delay in the blast.This consists of a coil of shock tube, a Delay Detonator and a suitable connector. The connector will be on one side. This end of the coil is end sealed to arrest ingress of water. The other end of the coil is crimped to a Delay Detonator with a suitable rubber plug.

The Detonator will be inserted into the explosive cartridge or into a Pentolite booster and will be lowered into the borehole. The other end of the coil is connected in the blast circuit with the help of the connector.

SRIDET DOWNLINE is available in different delay timings viz. 200ms, 250ms, 350ms, 400ms, and 450ms.

The Delay time stickers are attached to the coil to find out the downline delay. The coil will have two stickers indicating the length of the coil.

SRIDET Downline is available from 3meters to 50meters as per the customer’s request.

ADVANTAGES WITH SRIDET DOWNLINE :

1. True point bottom initiation is being done in the blast
2. Due to true bottom initiation, all the explosive energy will be utilised for breaking the rock. Because of this, airblast noise is minimised.
3. Good fragmentation
4. Less ground vibrations
5. Good muck pile profile
6. Since the explosive shock wave is confined to the shock tube, no desensitisation of explosive. Hence 100% calculated energy is available for rock blasting
7. This can be used either with Catridge Explosives, ANFO or with Cast Boosters.
8. The superior qualities of shock tube makes it insensitive to the oil in the explosives, thus providing good sleeping time in the borehole.
9. Provides accurate down the hole delay

  

PRODUCT SPECIFICATIONS :

APPLICATIONS :

SRIDET DOWNLINE can be used for Surface Blasting, Quarrying, Long Hole Blasting etc.

B SRIDET TOPLINE :

SRIDET topline was developed specifically for surface blasting. The topline is used to provide the delay between the holes in the rows and between the rows. Thus TOPLINE helps to provide delay per hole in the blast and reduces the charge per delay in the blast, thereby reducing the ground vibrations, airblast pressure etc.

SRIDET TOPLINE consists of a coil of shock tube. One end of the coil is sealed and the other end is crimped to a Detonator with the required delay timings. The Detonator is housed in a connector for surface hooking purposes.

SRIDET TOPLINE are available in different delay timings, viz, instantaneous, 17msec, 25msec, 42msec, 65msec and 100msec. The connectors are provided in different colors to identify the delay timings easily.

PROCEDURE FOR CONNECTING THE SRIDET TOPLINE

* Take sridet topline and spread it between the holes
* Insert the free end of the topline into the connector of second topline
* Insert the shock tube end from the downline SRIDET from the borehole into this connector hook-up.
* Connect the shock tune end of the previous topline into the connector and loop it around the connector and insert again into the connector for locking purpose
* The shock tubes are held tightly in the connector.
* Each connector can hold upto 6 shock tubes.

ADVANTAGES WITH SRIDET TOPLINE :

1. The surface air blast is eliminated completely
2. Eliminates the usage of 6.0 gr/meter and 10 gr/meter detonating fuses
3. Provides delay between the holes and between the rows in the blast
4. Converts the simple inventory into conducting blasts of unlimited sizes
5. Provides accurate delay per hole and thereby increases the fragmentation and over all blast performance.
6. Simple and userfriendly connecting system

PRODUCT SPECIFICATIONS :

  

  

  

  

C SRIDET DOUBLEDET :

SRIDET DOUBLEDET is a combination of SRIDET DOWNLINE and SRIDET TOPLINE. This is a two in one system. It has all the features of both topline and downline system.

Each Doubledet consists of a coil of shock tube one end of which is crimped with a downline delay Detanator of either 200 MS, 250 MS, 350 MS, 400 MS or 450 MS and the other end is crimped to a topline delay Detanator of either 0, 17, 25 MS, 42 MS, 65 MS delays. The topline delay Detonator is housed in a connector for surface hookup.

Double det is more economical where the blast patterns are repetitive with fixed spacing and burden. It helps in reducing the extra shock tube required for connections and thus reduces the cost of blasting.

All the above combination of timings are avaible from SGAE. Viz, 200ms/17ms, 400ms/25ms, 450ms/42ms, etc.

  

D & E SRIDET MILLISECOND DELAY DETONATORS AND SRIDET HALF SECOND DELAY DETONATORS

SRIDET MS series and HS series Detanators are very much similar in construction to SRIDET DOENLINE. The delay timings will vary from 25ms to 400msec for MS series and 500msec to 3000msec for HS series.

Each Detanator will consist of a coil of shock tube, one end is crimped with delay Detanator. The second end is provided with a oval connector and end sealed. Each coil contains two length indicating stickers and one delay time sticker. The over connector is useful for hooking to a detonating fuse in tunneling and surface blasting applications.

AREAS OF APPLICATION :

These are mostly used for tunneling, large hole stopping, ring hole blasting, blasting in highly conductive ore mines, surface trenching, underwater blasting and other non-gassy underground blasting operations.

  

PRODUCT SPECIFICATIONS :

DELAY TIMINGS

5. SUPER RELAYS-- 25ms , 50ms

Super relay is a Non-electric surface delay to provide delay between the holes and rows in Detonating Fuse initiated blast patterns. The super relay has two holes on either end of the component to insert and tie the detonating fuse. The super relays are available with 25ms and 50 msec delay timings. The 25ms super relay is available in blue color and 50ms is in yellow color. The super relays are bidirectional and can be used in the blast for safe and reliable multidirectional blast designs.

USAGE AND HANDLING :

1. Detonating fuse should be laid between the holes without much slackness.
2. Cut the detonating fuse and insert the end into the hole provided for this purpose in the connector
3. Insert the other end of detonating fuse into the second hole of the super relay.
4. Make sure that the detonating fuse ends donot fall on the middle of the relay.
5. Make sure that the ends of the detonating fuse will not get wet once laid on the ground.
6. Keep the relay close to the ground and to the hole as much as possible
7. The circuit should be looped for dual advantage of blasting.

APPLICATION OF SUPER RELAYS :

Super relays can be used to provide delay initiation patters such as row delay, diagonal pattern, V-pattern etc. Super relays are useful in all the locations where single hole initiation is required.

PACKING :

Super Relays are packed in cartons of 50 nos. each. Such cartons are packed in wooden cases or fibre board cases.

The case dimensions are 320 (L) x 340(w) x 150 H
The quantity per case are 500nos.

  

6. INSTANTANEOUS COPPER ELECTRIC DETONATOR NO.8 STRENGTH

SGAE offers reliable means of initiation of explosive charge with the supply of No. 8* strength instantaneous copper electric Detanators. The Detonators consists of a copper shell filled with PETN base charge and special ASA initiating primary charge. The shell is crimped with an electrical fusehead. Each fuse head is checked for its electrical characteristics like fuse head resistance before, during and after crimping operations and thus provide a high and reliable initiation of the explosive charges. The led wires of each Detonator is end twisted to arrest any unwarranted initiation of the fuse head with stray currents.

PRODUCT SPECIFICATIONS :

PACKING :

25 Detanators are made into a bundle and two such bundles are wrapped in kraft paper to make it into a packet. 30 such packets will be placed in a corrugated card-board box.

APPLICATIONS :

The instantaneous copper electric Detanators can be used in underground gassy coal mines.

  

7. SUPER COAL DELAY DETONATOR -- DELAY NO.0 TO 6

SGAE manufactures super coal delay electric Detanators from delay 0 to 6. These Detanators consists of Copper shell with PETN base charge and CASA initiating primary charge. The delay timing will come due to placement of delay element on top of the ASA. These Detanators are non-incendive in nature. They can be used for all types of blasting in underground gassy mines.

Super Copper delay Detanators are available from zero to 6. The delay timings are from zero to 150 milliseconds with delay intervals of 25 millisecond.

All the delay Detanators are of same length 62mm with two stickers indicating the delay time , one at the crimping side and one at the end twisting side of the leg wire.

On customer request, we can supply delay timing upto 1000sec as and when required.

PACKING :

25 delay Detanators are crimped and formed into a bundle. Two such bundles are wrapped in a kraft paper. The required number of bundles will be kept in the fiber board cases depending on the length of the ledwire.

SPECIFICATIONS :

  

PRECAUTIONS TO BE TAKEN WHILE USING THE ELECTRICAL DETONATORS

1. Make sure that all connections are made with clean bare wire ends and if necessary freshly exposed bare wire.
2. Make sure that the insulation of the leg wires is intact and not damaged by rough handling during charging, stemming etc.
3. Insulate all joints in wet conditions to arrest the leakage of applied firing current.
4. Make sure that the leg wires are sufficiently long to allow adjacent holes to be joined without use of additional connecting wires.
5. Test the shot firing cable for continuity and insulation before using in the circuit.
6. Make sure that the bare ends do not come in contact with any conductors such as power lines, pipes, rails or other paths of stray current.
7. Make sure that the blasting circuit is not in the immediate vicinity of any electrical equipment during shot firing. The stray current may fire off normal electric Detanators.
8. Ensure the usage of delay numbers in desired sequence in the blast.
9. Make sure that all persons were withdrawn to a place of safety before connecting shotfiring cable to the circuit.
10. Make sure that the shot firing cable is connected to the exploder just before firing the shot and is immediately disconnected after the shot is fired.
11. The exploder key must always be in the possession of the blaster and not kept on the machine.
12. Ensure that the exploder used is of adequate capacity and the current is of the desired magnitude for full initiation of the round.
13. Make sure that the excess leg wires are neatly coiled and the connections are not getting earthed anywhere.
14. Check the circuit for continuity before firing the shots. This must be done using only with approved blast- ohm-meter.
15. Ensure that the shot firing cable is of adequate length for firing from a point of safety.
16. Make sure that no person approaches the blast site until it is cleared of the fumes and inspected for safety.
17. Always take a shelter before firing the circuit.

Actions not to be done during the usage of electric Detanators:

1. Do not untwist the shorted ends of ledwires until just before connections are made.
2. Do not carry out shot firing in an area when an electrical storm is raging.
3. Do not use Detanators in the vicinity of radio-frequency transmitters.
4. Do not hold the Detanator shell during uncoiling of legwires. Hold the legwire itself. This will avoid any unwarranted pull on the fusehead. Also gently untwist any kinks caused.
5. Do not connect Detanators of different manufactures or firing characteristics in the same circuit/series.
6. Do not connect more Detanators in one round than the capacity of the exploder.

TESTS DONE FOR SAFETY IN HANDLING AND USAGE

(1) Drop Test

Drop test is a measure of the capability of the Detanators to remain safe without going off even when it is dropped vertically with the open end above a hard surface like steel plate or concrete slab. Dropping height used in the test is 2.5 meters. This ensures the safety while accidental dropping of Detonators in the field onto the ground.

This test is applicable to all types of Detonators.

(2) Shake Test
Shake test is a measure of the ability of the Detanator to withstand without going off the disturbance caused to it by thump, vibration and shock, similar to the ones that are experienced while being transported on rough roads.

The test is carried out by keeping the Detanators in a box and allowing the box to fall from a height of 15 cms at the rate of 30 times per minute for a period of 5 minutes.

This test is applicable to all types of Detonators.

(3) Snatch Test

Snatch test is a measure of the ability of the fusehead to withstand, without going off, the friction caused to it by a sudden severe pulling of the lead wires.

A sudden, pulling-down dead load of 5 kgs over a free fall of 0.5 mtrs is applied to the ends of legwire through which the friction to the fusehead is caused.

This test is applicable to all types of Electric Detonators.

PRODUCT PERFORMANCE TESTS

(1) Strength Test

This strength of the Detanator is evaluated by Lead Plate Test and Sand Bomb Test. These tests are indirect measure of the ability of Detonators to initiate high explosives.

In Lead Plate Test, a square 3cm X3cm lead plate is used. The hole made in the lead plate by the Detanator will determine the strength of Detanator.

In Sand Bomb test, a pre selected sand is subjected to the firing of the Detanator. The amount of sand crushed in the firing will determine the strength of the Detanator.

(2) Series firing

This test is a measure of the firing ability of Electric Detonators, when connected in series and minimum firing current of 1.2 amperes DC is applied. All Electric Detonators are subjected to this test.

(3) Firing Impulse Test

This test is related to the fuse head and is a measure of the energy required to setoff a fuse head. It is expressed in milliwatt seconds per ohm. Higher the impulse level the greater is the insensitivity of the fuse head for firing currents and resistant to leakage currents.

This test is done on all fuse head batches manufactured for use in Electric Detonators.

(4) “No fire” current test

This test is a measure of the ability of the Detanators for not getting initiated when the prescribed level of current is passed through if for a specified time. It is a measure of safety against stray currents, which can initiate accidentally the fusehead and thus the Detanator.

This test is done on all batches of fuseheads manufactured for use in Electric Detonators.

(5) Under water pressure Test :

This test measures the ability of the Detanators to get initiated even after exposure to water pressure. This will specify whether the Detanators can be used in watery boreholes and or for underwater blasting applications.

This test is done on all types of Detanators.

(6) Buxton Test

This test measures the fitness of the Detanator for use in gassy mines. This test is carried out in special steel chambers in an atmosphere of 9% methane –air mixture. This test applies to Detanators required for use in underground gassy mines. Instantaneous Copper Electric Detonators and Super Coal Delay Detonators are subjected to this test to evaluate their safety in gassy underground mines.

(7) Continuity of Electrical Circuit of the Detanators:

This test is being carried out to ensure the reliability of the fuse head. Each fuse head is tested for its continuity before crimping, during crimping and after crimping to the Detonator shell. This is a routine test done to ensure continuity of electrical circuit for large hook-up of Detonators. All electrical Detonators are subjected to this test during series firing test also.