Shock explosion proof of Jacob pipes and components

Since 1980 JACOB pipe-work has been tested under dynamic loads at explosion conditions. There are certificates of the Institute for Explosion Protection and Blasting Technology (Testing Facility for Mining Projects), Dortmund (Germany) and from the Development Committee of Structural Safety & Health at Work, Mannheim (research dept. Kappelrodeck) for the pipe-work listed.

1. Shock explosion proof up to 3 bar overpressure

1.1 Pipes and assemblies 2 mm (1,5 mm) wall-thickness machine-lip flanged

up to diameter 300 mm inclusive,
connection with galvanized or st/st pull-rings with U-shaped seal or QUICK CONNECT® pull-rings with U-shaped seals
Pipes L=50 up to 2000 mm, 2 mm thick
Segments 5 degree up to 45 degree, 2 mm thick
Bends 30 degree up to 90 degree, 2 mm thick
Forks 30 degree and 45 degree, 1,5 mm and 2 mm thick
Conical forks 30 degree, 1,5 mm thick
T-pieces, 1,5 mm thick
Symmetrical forks 60 degree and 90 degree, 2 mm thick
Symmetrical forks 90 degree and conical symmetrical fork 60 degree, 1,5 mm thick
Cone-pieces, 2 mm and 1,5 mm thick
Inspection-pipes with lock handle - reinforced version according to drawing 4/7969a (please specify tightness against shock explosions required when placing the order)
Spouts from square to round, 2 mm round, 2 mm thick, square with reinforced flange, 8 mm thick, according to drawing 4/7970a (please specify tightness against shock explosions required when placing the order)
Non-return valves with counterweight, diameter up to 200 mm, 2 mm thick (external body casing tested)
Throttle valves without seal, 1,5 mm and 2 mm thick
Throttle valves with seal, 2 mm thick

1.2 Throttle valves with seal, 2 mm wall-thickness up to diameter 300 mm inclusive,
pneumatically or electrically operated, are also tested as shock explosion proof lock-mechanism with a reinforced version of the inner flap according to drawing 4/7982a

1.3 Pipes and assemblies machine-lip flanged, 1 mm wall-thickness, diameter 80 mm, connection with galvanized or st/st pull-rings with U-shaped seal or QUICK CONNECT® pull-rings with U-shaped seals

In the standard stock programm there are pipe-works with diameter 80 mm only in 1 mmwall-thickness, which, however, have not been tested in tightness against shock explosions. Therefore the stability of these pipe-works has been found out by an internal water-pressure-test. Pipes L=2000 mm, forks, bends, segments and pull-rings have withstood an inner water-pressure of 10 bar, so you can conclude, that such pipe-works could be used in plants with 3 bar tightness against shock explosions. Pipe-works, diameter 80 mm made to specification can be manufactured also for a few components in 1,5 mm or 2 mm wall-thickness (in this case have a look at 1.1)

1.4 Pipes and assemblies 10 mm machine-lip flanged, 2 mm and 3 mm wall-thickness, diameter=350 up to 500 mm repectively 800 mm inclusive, connection with loose flange with specification acc. DIN 24154-T2, with U-shaped seal for 10 mm

Tested in dynamic load by explosion and certified up to 3 bar shock explosion proof are pipe-works listed:
Pipes up to L=2000 mm up to diameter=800mm, 2 mm wall-thickness
Inspection-pipes with lock handle, reinforced version acc. to drawing 21DSF 018, up to diameter=630 mm included, 2 mm wall-thickness (please specify tightness against shock explosions required when placing the order)
Bends 30 degree up to 90 degree to diameter=800 mm inclusive, 2 mm wall-thickness
Segments 5 degree up to 45 degree to diameter=800 mm inclusive, 2 mm wall-thickness
Cone-piece up to diameter=630 mm inclusive, 2 mm wall-thickness
Cone-piece up to diameter=800 mm inclusive, 3 mm wall-thickness
Forks and conical forks 30 degree and 45 degree up to diameter=500 mm inclusive, 2 mm wall-thickness
Forks and conical forks 30 degree and 45 degree up to diameter=630 mm inclusive, 3 mm wall-thickness
Symmetrical forks 60 degree up to diameter=500 mm inclusive, 2 mm wall-thickness
Symmetrical forks 60 degree up to diameter=800 mm inclusive, 3 mm wall-thickness
Symmetrical forks 90 degree up to diameter=630 mm inclusive, 3 mm wall-thickness
T-pieces up to diameter=500 mm inclusive, 2 mm wall-thickness
T-pieces up to diameter=800 mm inclusive, 3 mm wall-thickness

Branches like symmetrical forks, forks and T-pieces, 3 mm wall-thickness (necessary for diameter >500 mm), with loose flange are only available in painted mild steel or galvanized. In 3 mm stainless steel version you have weld on the flanges.

Forks and conical symmetrical forks with branches diameter <= 300 mm are machine-lip flanged on this ends for the pull-ring connection. Only branches with diameter > 300 mm have a loose flange.

1.5 Restrictions
Cleaning-pipes, push-in-pipes and air flow control gates are not shock explosion proof. Segments with diameter=140 mm and 224 mm as well as bends in stainless steel are shown in the price-list only in 1,5 mm wall-thickness, however are not tested by the above mentioned institute. But this pipe-works can be seen as 3 bar t shock explosion proof because of company-internal water-pressure tests. If requested, a company-certificate is available.

To make sure that the connection is shock explosion proof you have to tighten the screws correctly (torque setting 25 Nm). By using a loose flange connection the screws M10 (M12) have to be tightened with 40 Nm (60 Nm).

2. Shock explosion proof up to 6 bar overpressure

2.1 Pipes and pipe-works 3 mm wall-thickness

Mild steel machine-lip flanged up to diameter=300 mm inclusive,connection with st/st pull-rings with long-lasting sealant

Tested and certified are the following pipe-works:

Pipes L=50 mm up to 2000 mm
Segments 5 degree up to 45 degree
Bends 30 degree up to 90 degree
Forks 30 degree and 45 degree (surcharge) - compared with standard version these components are additionally counterwelded in the root (please specify tightness against shock explosions required when placing the order)
Inspection T-pieces - inspection opening closed by blank-off cover, 2 mm thick, connected by pull-ring (please specify tightness against shock explosions required when placing the order)
Spouts from square to round, square with reinforced flange, 8 mm thick, acc. to drawing 4/7970a (please specify tightness against shock explosions required when placing the order)
Two-way-valves with inner collar, without inner seal, symmetrical and asymmetrical (two-way-valves have been tested in tightness against shock explosions to the outside, not through the closed-off branch).

By use of galvanized pull-rings the tightness against shock explosions has to be reduced down to 3 bar overpressure.

3. Shock explosion proof up to 10 bar overpressure

3.1 Pipes and pipe-works 2 mm thick
Welded-on slip over flanges up to diameter 300 mm. Connection by special pull-rings.

Tested and certified are:
Pipes up to L=2000 mmForks 30 degree and 45 degree
Bends 30 degree up to 90 degree
End-covers

3.2 Pipes and assemblies up to diameter=630 mm inclusive, 3 mm thick, with welded-on flanges and flat gaskets acc. to drawing 21 DSF 001

Tested and certified are:
Pipes up to L=2000 mm
Segmentbends 30 degree up to 90 degree

4. Summary

You have to check regularly all the pipe-works for wear and tear and corrosion so that the tightness against shock explosions will be kept. Deteriorated components must be exchanged.

If required, we will send you a copy of the above mentioned certifcated.