LEAK DETECTOR

IMPACT DAMAGE TESTING MACHINE

NGV-CYL-JA12

ISO 11439 Statement

One or more finished cylinders shall be drop tested at ambient temperature without internal pressurization or attached valves. The surface on to which the cylinders are dropped shall be a smooth, horizontal concrete pad or flooring. One cylinder shall be dropped in a horizontal position with the bottom 1,8 m above the surface on to which it is dropped. One cylinder shall be dropped vertically on each end at a sufficient height above the floor or pad so that the potential energy is

488 J, but in no case shall the height of the lower end be greater than 1,8 m. One cylinder shall be dropped at a 45° angle on to a dome, from a height such that the centre of gravity is at 1,8 m; however, if the lower end is closer to the ground than 0,6 m, the drop angle shall be changed to maintain a   minimum height of 0,6 m and a centre of gravity of 1,8 m.

Following the drop impact, the cylinders shall then be pressure cycled between 20 bar and 260 bar at ambient temperature, initially for 3 000 cycles, then followed by an additional 12 000 cycles.

The cylinder shall not leak or rupture within the first 3000 cycles, but may fail by leakage during the further 12 000 cycles. All cylinders which complete this test shall be destroyed.

DESCRIPTION OF MACHINE

The jib crane is used to lift the test cylinder to the required height. Then remote release mechanism will release the cylinder to floor by the operator command.  The cable fixture

is fixed to the ends of the cylinder for lifting. The jib crane has access area of about 6 m diameter circular area.  So the lifting and dropping position can be moved around this area.

Remote Release Mechanism

 SPECIFICATION

1.     The machine can be used to test the CNG cylinders according to ISO11439  Annex  A (normative) Test methods and criteria A.20. Natural gas cycling test.

2.     The machine can be used to test the CNG cylinder of size: diameter 406 mm and length 1,800 mm maximum.

3.     The jib crane is used to lift the test cylinder to a maximum height of 4 m. Then remote release mechanism will release the cylinder to floor by operator (2 push button).

4.     Three cable fixtures are provided that the   cylinder can be positioned horizontally, vertically or 45 degree to horizontal before release.

5.     The height and position mentioned in above specifications can be adjusted automatically by remote control.

6.     The steel reinforced concrete (RC) floor is designed to withstand the impact energy of 1000 J. The floor area requirement: 4000 x 4000 mm.

7.        Control unit  with digital display and counter

8.     Column mount jib crane

Capacity                : 250 KG.

Column height        : 5M

Hook path              : 4M

Arm reach              : 3M

Power supply         : 380V, 3 Ph, 50 HZ

Please consult with our local agent to determine your requirement.

ACID ENVIRONMENT TESTING MACHINE

NGV-CYL-JA10 

ISO 11439 Statement

On  a  finished  cylinder  the  following  test  procedure shall be applied:

a)         Expose  a  150  mm  diameter  area  on  the cylinder surface for 100 h to a 30 % sulfuric acid solution (battery acid with a specific gravity of 1,219) whilst the cylinder is hydrostatically pressurized to 260 bar;

b) Pressurize the cylinder to burst in accordance with the procedure defined in A.12.

The burst pressure shall exceed 85 % of the minimum design burst pressure.

DESCRIPTION OF MACHINE

The test cylinders are placed in the bath.

Then they are exposed to a 30 % sulfuric acid solution with a specific gravity of 1,219, over a 150  mm diameter area on the cylinder surface for 100 h to whilst the cylinder is hydrostatically pressurized to 260 bar.  The exposure pond of 150 mm diameter is made by a soft rubber compound and the glass wool soaked with the above required acid solution is put inside the pond.

SPECIFICATION

1.     The machine can be used to test the CNG cylinders according to ISO11439 Annex A (normative) Test methods and criteria A.14. Acid environment test.

2.     The machine can be used to test the CNG cylinder of size: diameter 406 mm and length 1,400 mm.

3.     A Fiberglass reinforced plastic (FRP) tank can accommodate 4 CNG cylinders.

4.     The chemical resistant thick epoxy paint is applied on inside tank surfaces.

5.     The tank inter dimensions are 2.0 m length x 2.0 m width x 0.6 m depth.

6.     Inside the tank, the cylinders are supported by strong stainless steel supports which hold the cylinder in position firmly.

7.     The machine can measure and control the pressure of the test cylinders during test.

8.     The control station

Dimensions             : 1000 x 980 x 1500 mm.

Max. water pressure: 1034 bar

Test pressure          : 260 bar

Capacity                 : 0 – 4.5 GPM

Material                   : Plunger: 440 CSS; Body: SS 303; Seal: UMHWPE

9.     A pail of chemicals and soft rubber compound are supplied for testing 50 cylinders according to ISO11439 Annex A (normative) Test methods and criteria A.14. Acid environment test.

Please consult with our local agent to determine your requirement.

WATER JET WASHING MACHINE

NGV-CYL-JA30

FEATURES

The water jet washing machine provides maximum cleaning efficiency. This machine will degrease and remove loose debris from the exterior of cylinder tanks and is capable of cleaning 2 cylinder tanks per wash cycle. Insulated cabinet with high impact nozzles provide more  effective cleaning.

An innovative, long-life water-cooled induction motor that is light, powerful and energy-efficient.

This water jet washing machine features a detergent injector and high-pressure hose fitted with Quick Connect hose end connectors. A safety valve prevents pressure overload. High-performance machine with high-quality, lightweight pump to reduce noise.

SPECIFICATION

·         Insulated cabinet with material plate JIS G-3101 SS-400

·         Acrylic windows

·         Cylinder rolling mechanism

·         Polymer roller (to avoid cylinder scratch)

·         Internal jet spray (to clean internal cylinder)

·         Finishing Hot Dip Galvanized ASTM A-123

·         High impact nozzles provide more  effective cleaning

·         Rated Input Power :1800 Watt 

·         Rated Pressure : 20-120 Bar 

·         Rated Flow : max. 420 l/h 

·         Rated Temperature : max. 40°C 

·         Supplied with contaminant trap

·         Supplied with contaminant trap

·         Dimension: 2000mm x 1580mm x 2200 mm

Please consult with our local agent to determine your requirement.

CYLINDER INSPECTION VIDEO SCOPE

INVERSION RACK

NGV-CYL-JA29

FEATURES

The Inversion Rack (IR) has a 5 selectable pivot points and a locking containment arm to provided balance and safety to avoid injuries that can occur when employees use makeshift cylinder handing equipment.

The IR is Versatile. Durable, Efficient, Constructed of heavy-duty 1/4" carbon steel, the frame platform and cylinder cradle (coated to protect your cylinder) provide stability and long life service in any hydro shop environment.

The small footprint conserves workspace so the IR can be located near the test station to maximize time and labor savings.

OPERATION

Simply load a cylinder onto the IR

Invert the cylinder

Compact and convenience to the smallest test facility.

The IR is built to high standard of excellence and durability and comes with a 2 year warranty.

SPECIFICATION

·         Dimensions                  : 74" L x 24" W x 60" H 

·         Can be use for inverting : 30", 33", 51", 54", and 60" tall cylinders 

·         Min. Cylinder Size        : 101.6 x 762 mm (dia. x tall)

·         Max. Cylinder Size       : 269.8 x 1524 mm (dia. x tall)

·         Weight                        : 73 Kg

Please consult with our local agent to determine your requirement.

BONFIRE TESTING MACHINE

NGV-CYL-JA14

ISO 11439 Statement

A.15 Bonfire test

A.15.1 General

The bonfire test is designed to demonstrate that finished cylinders, complete with the fire protection system (cylinder valve, pressure relief devices and/or integral thermal insulation) specified in the design, will prevent the rupture of the cylinder when tested under the specified fire conditions.

Precautions shall be taken during fire testing in the event that cylinder rupture occurs.

A.15.2 Cylinder set-up

The cylinder shall be placed horizontally with the cylinder bottom approximately 100 mm above the fire source.

Metallic shielding shall be used to prevent direct flame impingement on cylinder valves, fittings, and/or pressure relief devices. The metallic shielding shall not be in direct contact with the specified fire protection system (pressure relief devices or cylinder valve).

Any failure during the test of a valve, fitting or tubing that is not part of the intended protection system for the design shall invalidate the result.

A.15.3 Fire source

A uniform fire source of 1.65 m length shall provide direct  flame  impingement  on  the  cylinder  surface across its entire diameter.

Any fuel may be used for the fire source provided it supplies uniform heat sufficient to maintain the specified test temperatures until the cylinder is vented. The selection of a fuel should take into consideration air pollution concerns.  The arrangement of the fire shall be recorded in sufficient detail to ensure that the rate of heat input to the cylinder is reproducible. Any failure or inconsistency of the fire source during a test shall invalidate the result.

A.15.4 Temperature and pressure measurements

Surface temperatures shall be monitored by at least three thermocouples located along the bottom of the cylinder and spaced not more than 0.75 m apart.

Metallic shielding shall be used to prevent direct flame impingement on the thermocouples. Alternatively, thermocouples may be inserted into blocks of metal measuring less than 25 mm square.

Thermocouple temperatures and the cylinder pressure shall  be  recorded  at  intervals  of  every  30  s  or  less during the test.

A.15.5 General test requirement

The cylinder shall be pressurized to working pressure with natural gas or compressed air and tested in the horizontal position at working pressure and at 25 % of working pressure if a thermally activated PRD is not used.

Immediately following ignition, the fire shall produce flame impingement on the surface of the cylinder along the 1,65 m length of the fire source and across the cylinder diameter.

Within 5 min of ignition the temperature at least one thermocouple shall indicate a temperature W 590 °C. This minimum temperature shall be maintained for the remainder of the test.

For cylinders of length 1.65 m or less, the centre of the cylinder shall be positioned over the centre of the fire source.

For cylinders of length greater than 1.65 m. The cylinder shall be positioned as follows:

a)     if the cylinder is fitted with a pressure relief device  at  one  end,  the  fire  source  shall commence at the opposite end of the cylinder;

b)    if the cylinder is fitted with pressure relief devices at both ends, or at more than one location along the length of the cylinder, the centre of the fire source shall be centered midway  between  the pressure  relief  devices that are separated by the greatest horizontal distance;

c)     if the cylinder is additionally protected using thermal  insulation,  then  two  fire  tests  at service pressure shall be performed, one with the fire centered midway along the cylinder length,    and       the        other     with      the        fire commencing at one of the ends of a second cylinder.

A.15.6 Acceptable results

The cylinder shall vent through a pressure relief device.

DESCRIPTION OF MACHINE

1. Bonfire chamber

The bonfire chamber has been designed for full safety.  The drawing of the chamber is as attached.   The 4 walls and the roof chamber are made of steel reinforced concrete (RC). Although there is an opening at both sides of front wall, the front barrier  wall is made big enough to prevent any flying out object from the blast of the CNG cylinder to escape.

On the front wall, there is a viewing window for the video camera.

2. Design Calculation

1.     The inter size of the chamber is 3 m length x 3 m width x 2.5 m height. This big chamber design prevent the concrete wall damaged       by blast pressure wave. The blast wave energy of a CNG cylinder of 80 liter capacity = 11.7 MJ.

2.     The walls and roof are designed to withstand for impact of flying pieces from the cylinder blast. The maximum velocity of projectile at blast = 33.6 m/s (121 km/h).

The maximum impact energy on the wall = 28224 J 

3.     Hence, the RC wall and roof thickness to withstand above factors is 20 cm and walls are standing on the strong foundation.  (The   foundation  design depends on the soil bearing capacity)

(All detail calculations will be available at the time of contract.) 

The following figures show the design without front barrier wall.

3. Fire source

The fire source uses the LPG fuel as shown. The length of fire source is 1.65 m.

The burner has been designed to have even heating along the cylinder length.

The fire source is able to be ignited remotely.

4. Instrumentations

Three thermocouples (T) are installed on the bottom surface of the   cylinder. Two thermocouples are installed at both ends. Metallic shielding is used to prevent direct flame   impingement on the thermocouples. The water cooled pressure transducer (P) is installed at inlet pipe.

The machine  can  record  time,  temperature, and  pressure readings at 30 second intervals or less, beginning when the fire is ignited and continuing  until  the  pressure  release  device releases.

SPECIFICATIONS

1.     The machine can be used to test the CNG cylinders according to ISO11439 Annex A (normative) Test method and criteria A.15. Bonfire test.

2.     The machine can be used to test the CNG cylinder of size: diameter 406 mm and length 1,800 mm.

3.     Bonfire chamber:

a)     Steel     reinforced         forced concrete  (RC)  walls  and  roof with sable foundation, (fire proof)

b)    Internal dimensions 3 m Length  x  3  m  Width  x  2,5  m Height,

c)     thickness  of  walls  and  roof 20 cm

d)    The chamber geometry prevents any flying object from the  cylinder  blast to escape outside chamber

e)     Test station is able to control the  temperature  and  pressure in time during bonfire test

f)     The test cylinder is supported above ground with its longitudinal axis horizontal.

4.     Fire source:

a)     Fuel LPG

b)    length 1.65 m

c)     material  steel

d)    distance between the fire source and cylinder is 100 mm ±3

e)     The fire source is able to get the   cylinder   bottom   surface temperature of 590°C or more within 5 minutes of ignition

5.     Instruments:

a)   Surface temperature is monitored by 3 thermocouples located along the bottom of the cylinder and spaced less than 0.75m apart.  Thermocouples are   inserted   into   blocks   of metal measuring less than 25 mm square.

b)   Thermocouple   type K 0 to 1000 °C : 5 pc

c)   Pressure Transducer (water cooled) 1000 bar 1pc for pressure measurement of cylinder gas pressure during test.

d)   The PRD (pressure relief device) 1 pc (made       of stainless steel)

e)   PC data acquisition system (Temperature, Pressure, Time)

f)    Temperature and pressure data are recorded at 30 second interval or less.

6.     The bonfire test is monitored by the software program running on Windows OS. Data are recorded and stored  in the data collection. The recorded data can be analyzed and the graph can be plotted. The test result is reported as number or graph and printed out on the printer. The report format can be selected by user.

7.     Video camera and PC

8.     Equipped with 3 set of cylinder trolley

Please consult with our local agent to determine your requirement.