Sunday, 28 July 2013


Posted by Unknown On 23:48


1.Made from Schott-Duran Borosilicate 3.3 glass tubing only.
2.Standard and specific design to suit any parameters.
3.Available in various sizes.
4.Your best option to switch over from IMPORTED to INDEGENIOUS

Saturday, 27 July 2013


Posted by Unknown On 20:24

Key Contact Persons
Mr. Anshul Goel
+91-98253 18944

Mr. Keyur Shah
Exec. Director (Technical & Marketing)
+91-98253 03966

Mr. Himanshu Bhatt
AGM - Technical
+91-98253 00935

Mr. C.M. Trivedi
Manager Marketing (Lab. Div.)


Posted by Unknown On 19:12*

GOEL SCIENTIFIC GLASS WORKS LTD. is one of the leading Scientific glass fabricator in the world, who has provided
the Glass Industry of India a big leap in the Global Market. We have made presence in all the populated continents and are
representing & supplying our product & service worldwide. At present, we have over 250 satisfied customers across the

We fabricate glass parts from best raw material from various leading manufacture for its production. On request, we also
produce glass parts from Leading European Borosilicate Glass 3.3 tubing supplier which fulfills all major standards of DIN
ISO 3585 & ASTM E438 Type I, Class A and thus offering high accuracy & excellent optical properties which is at par to
other leading manufactures across the globe.

Understanding the Glass at it's best, we forge Glass with the precise mixed combination of craftsmanship of Potter,
Blacksmith & Goldsmith with a blend of engineering, being “The Transparent Specialist”.

We specialize in design, fabrication, engineering, installation & commissioning of Pilot Plant/Mini-Plant & Standard
Distillation Unit for Research & Development. All glass parts are designed, fabricated, tested & installed as per
International Norms like ISO 3585, 3586, EN BS 1595, AD 2000 Merkblatt. On request, glass pilot plant parts are available
with CE Marking & documentation with added monetary value.

We have been launching an entire range of glass equipments in the Indian & global market. A few are as below:

1989 : 
Developed the unique XTRONG RANGE, which possess a tightening strength as high as 3 times than
earlier conventional ones and thus almost eliminates leakage and breakage problems while tightening.


Introduced Glass Shell & Tube Heat Exchangers for the first time in Indian market.


Started “Process Plant Division “ for the development of New Products.


Started manufacturing Spherical Vessels from an entirely new technique very first time in the country,
placing us at par with overseas manufacturers of such vessels.


Became the first ISO-9001 certified company in the “Glass Equipment Manufacturing “segment in India.


Successfully executed export order of 640,000 multi-necked flasks within a time period of 8 months.


Developed 300-Litre Spherical Vessel & participated as exhibitor in ACHEMA-2003, Frankfurt, Germany.


800 DN pipe section manufacturing for the first time in India.


Manufactured 500 Ltr. Spherical Vessel.


Participated in ACHEMA-2006 for 2nd time & given seminar on “Jumbo Rotary”at Frankfurt, Germany.


Developed FLEX-HE (Assembled coil type) heat exchangers.

Awarded for outstanding performance for the year 2006 - 07 by Govt. of Gujarat, Ministry of Ind. & Mines.


Manufactured for the first time 800 Ltr. Kettle and participated in ACHEMA -2009 at Frankfurt, Germany for
the consecutive 3rd time.


Developed Flexi Double Jacketed Vessel (Triple Wall – Detachable Jacket)


Developed Assembled Jacketed Vessel up to 200L Capacity.

A Unique beautification project designed to reach turn over Rs. 2500 Cr. from 10 Cr. in 10 years.


Posted by Unknown On 07:11*

Laboratory works require apparatus made in a Borosilicate 3.3 expansion glass which offers maximum
inertness to widest range of chemical substances, withstand thermal shock, high temperature without
deforming and resilient enough to withstand the normal laboratory handling, washing and sterilizing

Borosilicate glass represents unmatched standardized glass for construction of Laboratory
Glasswares. Its steadly growing use is due to many advantages over conventional materials.

  • Outstanding corrosion resistance
  • Smooth pore and surface.
  • Transparency
  • Catalytic, inertness
  • No effect on taste and odour
  • Physiological inertness

Borosilicate glass is chosen for its unique chemical and physical properties. Borosilicate glass can be
considered as being composed of oxides. Silica (SiO2 ), boric oxide (B2O3 ) and phosphorous
pentaoxide (P2O5 ) are chief glass form oxides. Soda (Na2O), Lime ( CaO ), Alumina (Al2O3 ) Potash
(K2O) Magnesia (MgO) and lead oxide (PbO) are the principle modifiers/fluxes.

The composition of borosilicate glass used has following approximate composition.
SiO2 - 80.6 %B2 O3 - 12.5%
Na2O - 4.5 %Al2 O3 - 2.2 %


Borosilicate glass is inert to almost all materials except hydrofluoric acid (HF) phosphoric acid (H3PO4)
and hot strong caustic solutions. Of these, Hydrofluoric acid has the most serious effect, even when it is
present in PPM (parts per million) in solutions, Whereas phosphoric acid and caustic solutions cause
no problems when cold but at elevated temperature corrosion occurs. In case of caustic solutions upto
30% concentration can be handled safely at ambient temperature.

Under actual operating conditions, the effect of turbulance, and traces of other chemicals in the
solution may increase or decrease the rate of attack. So it is not possible to give exact figures for
corrosion by caustic solutions.


Linear coefficient of thermal expansion the coefficient of thermal expansion of borosilicate glass over
the temperature 0-300 OC is 33 x 10-7 / OC. This is very low when compared with other glasses and
metals. That is why borosilicate glass is often called low expansion borosilicate glass.

Specific heat between 25OC and 300 C is average to be 0.233Kcal/Kg C.


Thermal conductivity is 1.0 Kcal/hr. m C over the permissible operating temperature range.

Annealing of glass is the process where the glass is heated and kept for a defined period of time to relieve internal stresses. Careful cooling under controlled conditions is essential to ensure that no stresses are reintroduced by chilling/cooling.

The lack of ductility of glass prevents the equalization of stresses at local irregularities or flaws and the
breakage strength varies considerably about a mean value. This latter is found to occur at a tensile
strength of about 700kgs/cm.
In order to allow for the spread of breaking stress, a large factor of safety is applied when determining the
wall thickness requirement to allow operation up to specified limit of working pressure.

Borosilicate glass shows no appreciable absorption in the visible region of spectrum and therefore appears clear and colorless. In photo chemical process the transparency of ultra violet is of particular importance. It follows from the transmittance of material in UV region that photochemical reactions such as chlorination & sulpho -chlorination can be performed in it. 

Head Office :
C-31/A, Sardar Estate, Ajwa Road, Vadodara - 390 019 Gujarat, India
Ph. : +91-265-2561595, 2521181 l Fax : +91-265-2561482, 2511428

e-mail : |

Friday, 26 July 2013

Goel’s Condenser

Posted by Unknown On 23:19

We at GOEL manufactures and supplies Condensers up to 24inches.
Condensers are used for condensation of vapors and cooling of liquids. Condensers are made by fusing number of parallel coils in a glass shell. Coils are made in different diameters using tubes of different bores.

The average co-efficient of heat transfer in coil condenser
is considered as-
Condensation 200 - 270 Kcal/m ,hr, C appx.
Cooling 100 - 150 Kcal/m ,hr, C appx.

Below table shows the detail dimensions of different size condensor:

Precautions to be taken in use of condensers
- Vapors should be passed through shell only.
- Maximum pressure of coolant should be 2.7 bars.
- Adequate flow of coolant should be used.
- Steam should not be used in coils.
- Coolant should not be heated to boiling point.
- Coolant control valve should be turned slowly.
- Coolant should be allowed to drain freely.
- Brine can be used in coils in a closed circuit.
- Water main should be connected with flexible hose.
- Ensure no freezing of water remaining in the coils.
- Condensers should be mounted vertically only.
- Condensers can be mounted in series to provide larger surface area.


Vapors from bottom
This method is simple to install over a reactor. However this results in condensate returning substantially at its condensing temperature. In this method care must be taken that condensate is not excessive that it can lead to "logging" the coils and create back pressure in the system. Generally a reflux divider is used below the condenser to take out the distillate.

Vapors from top
This method produces a cool condensate using the entire cooling surface area. This method should be used where the condensate can lead to "logging" of coils.