Sarel Engineers

Our organization is engaged in offering a wide collection of Condenser Tube expander for thin wall tubes such as Titanium Tubes to the customers. This product generate better expansion results and the covering area in one cycle expanding operation is 40% more area and that expands tube more spherical than to roller expander in free expansion at less than 0% expansion thinning.

Features:

• better push out results

• accuracy

• mirror finish

• Helix angle of rolls performs as burnishing tool.

Burnishing: Roller burnishing work is one of the method for precision finished in which precision finished rollers are caused to rotate in contact with the work to effect plastic deformation metal surface to a very slight degree.

The surface of the section through lathe or boring machine is a succession of projections and indentation when microscopically examined roller burnishing compreses these projections into indentations to form a smooth surface

Boiler thick drum tube expanders S-9

The Boiler Thick drum tube expanders S-9 offered by us are widely appreciated and lauded by our clients for durable and cost effective nature. This products is specially developed to get the inner or 1^st operation and equipped with non flaring adjustable collar type . It controls the length of expansion by means of threads provided on the body (S8012 type Tube Expander) for the final operation Sarel SB700. The product find application in serves the purpose of expanding and flaring in one operation. The operation of this product is given below:

“When boiler drums are thicker than standard roll size in the flaring type tube expander is expanded in several progressive operations, depending upon the thickness of tube sheet .Combination of this two type expander should fulfill the exact requirement of thicker tube sheet tube expansion by 1/4" or 5-6 mm overlap of rolls between progressive operation.”

We are engaged in offering a wide range of Boiler Tube Expender S-19 to the clients,which are known for high efficiency, robust construction, long service life and cost-effectiveness. These Boilers are used with parallel and self rolling, self feeding for low and high pressure steam boilers. Apart form this, we have made this product available on competitive price.  

We are engaged in offering a wide range of Cone Rolling Tube Expanders S-15 mto the respective customers. This product is manufactured using high quality raw material, which we procures from the esteemed vendors of the domain. These vendors holds a vast industry experience and in-depth knowledge of the domain that ensure the quality of products.

“When automatic or manual fuse weld of tube to tube sheet is required to be done, Tube end OD must be in one centre line and uniformly mallet push contact expanded with its tube sheet hole. Contacting surface area should be in the range of 2-4 mm length. Cone rolling serves the above purpose for making good weld preparation operation. Tag welding can be avoided by cone rolling for retaining tube in one position in tube sheet hole”

We are engrossed in offering a wide collection of Double Tube Sheet Tube Expansion S-14 to the respective customers of the domain. This product is made using high quality raw material and under the supervision of industry best professionals. Below we are providing the way to operate this product:

This is the most challenging tube expansion work for inner tube sheet tube expansion. Following points must be observed before starting tube expansion of double tube sheet tube expansion.

• All the dimensions of inner tube sheet hole must be checked 100% and recorded in the direction of 90 degree and 0 degree by bore dial gauge.
• All the tube sheet hole and tube OD must be cleaned by acetone before tube insertion.
• Deviated tube sheet hole to be attended separately according to the simulated mock-up hole qualification.
• Do not alter the expansion parameters once established on mock-up during tube expansion on the job.
• Parameters: A) Type of Expander B) Drivegun C) Torque Control setting
• 10% of total no. of holes on the trial block should be kept aside to qualify the tube expander tooling to be used on the job which will be qualified and kept ready to use on the job.
• Check the tube expansion after every five expansion operations and understand the behavior of operating expander. Use alternate expander using cooled tube expander from the solvent approved by the customer.
• For Titanium, monal and SS Tube expansion, use sulphur and chlorine free lubricants as approved. Uniform tightness is only possible by using torque control tube expansion unit which is qualified for above work.
• Sarel undertake expansion and consultation of such jobs.

Apart from this, we are also offering a wide range of job work and services related to installation and operations of these products at clients end. Furthermore, our collection of products also includes Condenser Tube Expander S-4, Tube Facer or Trimming Tools S-3 and Plate Oil Cooler Tube Expanders S-7.

Our organization is engaged in offering a wide range of Ferrule S-13, which is a kind of tube end that inhale for protecting a tube end or restore a tube back to service. This product is short length of tube as per the design and specifications, which was specially designed to be inserted into at the end of pre-heater or heat exchanger tube in an attempt to salvage the unit without necessity of tube replacement. We provides all the Ferrule Forming and machining as per the specific requirements of the clients.

Sarel undertake such tube expansion & consultation work.

It is a traveler Expander generally used in nuclear power projects steam generator of thick tube & deep expansion. Longer length tube expansion & performs uniform, parallel and smooth expansion zone.

The tube is expanded as required length by same set of Pilgrim Tube Expander roller, mandrel and cage in one go. Pilgrim Tube expander is not taken out once it is put to use in tube for expansion operation by Non-stop gradual forward reverse travel gradual- hence no missed out of stage in between long expansion length is possible every forward rotation gives longer overlap and hence it irons out the earlier expanded area that furnish good finish & accuracy.
Clutch assembly on last groove on Pilgrim Tube expander secure correct and consistent depth of expansion. Because it has larger overlap gives repeat expansion or iron out the previous blacktail expanded area helps the seal that seal perfectly and gives better push out strength in minimum percentage thinning thus life of the equipment is longer than other conventional method of tube expansion system.

Minimum Breakage: Pilgrim Tubes expansion every forward stroke covers only 20% of effective roller length as new increased expansion zone keeping remaining 80% as overlap requires very light torque. Hence the operating load on the Pilgrim tube expander is light and were out of tooling is minimized.

Construction of Pilgrim tube expander is such that at any position roller or mandrel do not fall out of the caps & no misplacing of loose rollers in deep hole tube is possible.

Sarel undertake such tube expansion & consultation work.

Our organization is instrumental in offering a wide range of

After successful removal of tubes from reclaimed tube sheet, it is necessary to inspect tubesheet holes dimensionally to assess the deviation or variation of dimension with respect to its original tubesheet holes dimensions stated in drawing. It is observed that while

for more details refer to the attached pdf file

We are offering high quality SS Contamination, which is made from stainless steel material suitably heat treated. The Short bend tube expander is manufactured with short mandrel tube expander as per requirement of pressure tight fitting of pipe to flange, coupling etc. Moreover, this product is available on industry leading prices with frequent delivery services.

the tube rolling are made from sulphur & chlorine free lubricant and the conventional mineral lubricants available in the market contains some amount of sulphur & chlorine as they have derived from crude petroleum, which contains these impurities. For sulphur & chlorine free oil we recommend our synthetic oil S440/460 worm gear lubricant having viscosity of 440 CST. This oil being synthetic base can also withstand high temperatures during rolling stage without affecting performance of the product.

The Torque Control Tube Expanding Unit offered by us is designed to switch off the current to an electric drill driving a Tube Expander automatically when a preset torque value is reached. We have obtained this by manipulating Coarse and Fine Rotary Controls,where the motor drill is a reversible type. In this way, the current drawn is measured by control unit, which also switches off the power supply at the preset value, thus limiting the torque at the Mandrel of the Tube Expander from the Tube.

Our organization is engrossed in offering a wide range of Weld Preparation Tool Assembly S-20 to the clients, which are used in trimming the tube under flush the tube sheet and chamfers the tube sheet hole 45 deg in one operation. We have managed to operate facing and chamfering in special cutlers are designed and attached to the total assembly. Moreover, we are providing these products on industry best prices.