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Restrained Pipe Joint
DN 100mm -300mm

Restrained Pipe Joint
DN 350mm -1000mm

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Flanged Pipe

Range of pipe

Product Range

Flanged Pipes Applications and Advantages

Applications 

Flanged Pipes Specifications

* The flanged Pipe is typically used in above ground applications such as Over-ground Pipeline ,treatment works, pumping stations or fire mains.
* Flanged ratings from PN10, PN16 available. (PN25 on Request) .
* According to the risk of excessive bending moment being imposed it is advised that flanged pipe-work is not buried.

Jointing

Accessories for Flange Pipes: 

Gaskets
For Flanged pipe jointing are normally flat rubber gaskets EPDM el astomer as per ISO 4633.Use of poor quality gaskets made of Natural rubber is not recommended. 

Bolts & Nuts for the joint  
Bolts made of Mild Steel as per ISO 1367 & Galvanized Nuts. High Tension bolts may be used where high axial load is anticipated.

Jointing Procedure for DI Flanged Pipes :
– Clean the faces of the flanges.
– Inspect the gasket for any damage or manufacturing defect.
– Align the pipes property and position the gasket between the flanges.
-Put the bolts into the flange holes one by one maintaining the alignment.
-Keeps the gap between the flanges approximately uniform while tightening .
-Tighten four location bolts in order to roughly secure the adjoining flange.
-Bolts to be tightened in the correct sequence and to the appropriate torque.
-Tighten nuts to finger tight.
-Check alignment of  flange face and gasket.
-Insert remaining bolts and tighten nuts to finger tight.
– Finish with one final pass by providing torque in a clockwise direction.
– Tighten to 100% of estimated torque using the same sequence.

  Precautions during installation of Flanged Pipes :

· Flanged Pipes are mainly for over ground installation, Buried installation of flanged pipe is not recommended.

· Flanged Joint being a rigid joint , perfect alignment of the flange faces during jointing and bolt tightening is absolutely vital.

· Use of duck foot bend at bottom of vertical flange pipe line is necessary.

· For high pressure application, even flanged pipeline ( both horizontal & vertical ) needs thrust block / support at bends / tees.

Flange pipe laying from one side if from both sides , put flexible coupling or mechanical Joint coupling in between & avoid pulling the flanged pipes flanges from both ends.  

coating

Internal & External Protection

ENC offer a variety of lining coating for use with various types of fluids and for different applications. The most commonly used combinations of corrosion protection with recommended usage are :

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El-nasr Castings  ( ENC ) produces ductile iron and gray iron decorative light posts in different figures and sizes to decorate streets, squares, clubs, famous places and general parks. The decorative light posts have completed the un standard products collection of ENC since 1996, the year of the first generation of this production  High Quality Castings Plant in Alex.
specialized in producing this light posts and succeeded to cover the Alexandria Government with the required posts in different places such as; alongside of the sea coast, squares, the new Alexandria library and Stanly bridge, After dominating the local market, the company proceeds to export this successful product which has been
 receipted with all acceptance and admiration by clients due to the creative designs and its high resistance against
 the changeable weather factors.

Miscellaneous Castings

El Nasr Castings Co. give a part of its capacity for the production of miscellaneous castings.   

These castings could be from special cast iron or steel (e.g. Ni-Cr steel, Heat resisting gear steel, Corrosion resisting Mn- steel, Carbon steel and Tool steel).
These products could be used for Iron & Steel, Automotive, Textile, Chemical, Cement, Metallurgical Industries and Electric Sector.

In addition, miscellaneous castings include moulds used for producing centrifugally cast pipes.

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Soft Sealing Gate Valve

Standards :

Butterfly Valves

DN350 – DN1800, PN 10 / PN 16

Advantages In Short :

1. Body Seat face as nickel weld overlay, micro finished .
2. valves disc double offzdet on shafts.
3. Designed for optimum hydraulic flow patterns.
4. low flow coefficient.
5. Endless profile sealing ring.
6. Adjustment and exchange of peripheral seals are possible without removing the valve disc.
7. All screws in contact with working fluid  of stainless steel A-4.
8. A positive, tight shut -off.
9. Sealing of the disc is guaranteed for pressure from both sides.
10.  Suitable for flow control purposes.
11.  Irreversible spindle gear, corrosions resistant.

ENC Succeeded to Produce Butterfly Valve DN 1800

Applications:
Butterfly valves are used in :

• Water supply plants, well chambers, pumping station, high level

reservoirs, filter plant pipe lines.

• Power stations, primary and secondary cooling circuits.
• Waste water disposal, high water pumping stations, water engines,

clarification plants.

• Water, non aromatic hydrocarbons, weak alkalis and weak acids.

 Standards :

Materials :

Electric Valves

El-Nasr Castings Co. is considered as a pioneer company in ductile and grey iron castings.
Due to continuous history of innovation which is reflected in the high standard and wide range of its products according to ISO 2531 and EN 545, ENC has succeeded to penetrate and keep reasonable share in both local and international markets.

– ENC has obtained in October 1995 from RWTUV, Germany ISO 9002 certificate which has been renewed in 1998.
– ENC has obtained in July 2002 ISO 9001: 2000 certificate, valid until July 2008 and has been renewed till 2011.
– ENC has obtained in December ISO 9001:2008 by Germanscher  LIoyd valid until December 2014. 

In co-operate with ARABIAN TRADING & ENGINEERING CENTER (ATEC) , representing AUMA Company-Germany, ENC has succeed to produce and supply electric valves to the market which meet client’s need to control “the water flow” automatically.

Types of Electric Valves  :

–  Electric Soft Sealing Gate Valve

–  Electric Butterfly Valve

Operation

1. Open/Close Duty :
   Water flow can controlled automatically according to operating order to
   get complete open or close certain percent.
2. Modulating Duty :
   To Get :
   – Constant flow rate in pipes.
   – constant water pressure in pipes.
3. Integral with matic unit

Specifications of Electric Valves :

(!) Sizes :
Electric Soft Sealing Gate Valve diam.65 mm to 300 mm
Electric Butterfly Valve diam.35 mm to 1200 mm

(2) Applied Standards :

(3) Materials :

(4) Technical Aspects :

• The Actuator is  equipped with two independent adjustable limit switches and two torque switches without any plastic parts or butteries which may need maintenance .
  Connecting wires are sealed in the switch housing actuator. Switches work under mechanical principles.
• The Actuator includes a hand wheel marked with two arrows for open/close in case of power failure and adjustment mode.
  The hand wheel will automatically be disengaged when the electric motor is energized .
• The Actuator transmits the motion from the motor to the valve through worm gear box principle which provide self lubricant and locking.
• The Actuator casing is made of cast iron (GG25) accord. to international specification to be able withstand the operation mechanical stresses.

Applications

 For Cold Water And Air Service

1. Water supply planets (industrial and potable water)
2. waste water systems.
3. Air supply plants.
4. Pressure and plants.

• Water supply plants, well chambers, pumping station, high level reservoirs, filter plant pipe lines.
• Power stations, primary and secondary cooling circuits.
• Waste water disposal, high water pumping stations, water engines, clarification plants.
• Water, non aromatic hydrocarbons, weak alkalis and weak acids.

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Products

Ductile Iron Pipes

Overview

Ductile Iron Pipes have proved a high efficiency in Multi-purposes, whether, for potable water ,industrial water or waste water, due to its flexibility and high performance regarding stresses and corrosion – resistance.
Ductile iron pipes are the pipes for present and future.
Since its introduction into the marketplace in 1955, Ductile Iron pipe has been recognized as the industry standard for modern water and wastewater systems. More than six decades of field experience have proven its strength, durability, and reliability  for transporting raw and potable water, sewage, slurries, and process chemicals. Ductile’s high degree of dependability is primarily due to its high strength, durability, impact and corrosion resistance. Designed and manufactured to the industry’s most stringent standards,
Ductile Iron pipe resists damage during shipping and handling, and once installed withstands the most demanding operating conditions, including water hammer, frozen ground, deep trenches, areas of high water table and heavy traffic, river crossings, pipe on supports, rocky trenches, and areas of shifting, expansive, and unstable soils. Installation is simple. Unlike some pipe materials, Ductile Iron pipe requires no complex line-and-grade drawings or laying schedules. It can be installed in a wide variety of trench and bedding conditions and can be easily cut in the field. Direct tapping, even in straight lines, doesn’t affect its integrity. And, once installed, Ductile Iron pipe is virtually maintenance free.
The pipe is manufactured in 6m nominal laying lengths from DN150mm – DN1000mm diameters in a range of standard pressure classes and nominal wall thicknesses.
Ductile Iron is furnished with several different types of joints, and a wide variety of standard fittings are available without special order. Although Ductile Iron pipe is usually furnished with cement mortar  lining, optional internal linings are also available for a wide range of special applications.
And Ductile Iron’s generally larger-than-nominal inside diameters, combined with its high flow coefficient, offer substantial savings on pumping and power costs over the life of the pipeline

Range of Pipes

ENC produces Ductile Iron pipes from DN 150 mm to DN 1000 with nominal Laying Length 6 m according to the International Standards ISO 2531 and EN 545

Ductile iron pipes are protected externally with a pure zinc – coat and bitumen BS 10
Ductile iron pipes are internally by cement mortar-lining.
Pipes withstand external pressure resulting from heavy loads, the pipes are not affected, resisting fracture and keeping their original shape due to elasticity property.

pipes withstand internal high pressure during factory tests:
– 60 bar for diameters up to 300 mm.
– 50 bar for diameters from 350 up to 1000 mm.
– 40 bar for diameters from 700 up to 1000 mm
  Pipes have the advantage of small wall thickness which leads to an increase in the internal diameter for the same nominal diameter compared with other types of pipes.
 Pipes have the advantage of high resistively against the high salinity of ground water, aggressive soil and stray electric currents.
 Ductile Iron Pipes are the best types suitable for erection in cities with bending streets  

Applications

Ductile Iron Pipes Applications

• Due to Ductile Iron pipe’s exceptional strength and durability,
  it can be used in a wide variety of wastewater  applications.

• Ductile Iron pipe is utilized for innovative
  solutions of sewerage piping problems. Illustrated is an
  “at grade” gravity sewer.

• Well-suited for difficult installations due to its inherent
  strength, Ductile Iron is an excellent piping material for use
  in gravity sewer applications. Its superior ring strength,
  combined with its bottle-tight joints, makes it ideally suited
  for deep trenches and installations in areas of high water table.

• Ductile Iron pipe has long been the material of choice for
  water and waste water treatment plant piping due to its
  wide selection of joints and fittings and the fact that it can
  be fabricated for any application.

• Ductile Iron is well-suited for use in pipe-on-supports
  applications due to its tremendous beam strength

————————————————————————————————————————–

• Ductile Iron pipe is often used for inverted siphons in
  difficult installations such as the stream crossing shown
  here because of its great strength, joint integrity, and

       its versatile and readily available joints and fittings.

Technical Details

a  A tolerance of +1 mm applies
b Thicknesses are greater than calculated for “smoothing” between C40 and C30 and also between C30

Coating

Internal protection for the pipes

Ductile pipes are used for conveying a wide variety of media,  untreated water, drinking water, sewage. Such liquids can affect the nature of the pipeline in very many aggressive ways.
Our production range contains a number of tried-and-tested interior linings to combat virtually all forms of aggression.

Cement mortar linings conform with ISO 4179/EN 545.
The cement-mortar lining prevents tuberculation of the pipe by creating a high pH condition at the pipe wall and stops the production of red water.

The seal coat provides a barrier between soft or acidic waters and the cement-mortar lining.
Additionally, cement-mortar linings create a hydraulically smooth flow surface inside the pipe, resulting in less friction and thus, less head loss.
Cement mortar linings helps to maintain same flow area and co-efficient of friction over a long period of time

External protection for the pipes

Pipes buried in soil are exposed to soil aggression. So a variety of external protection measures are available to match various type of aggression. 

The following coatings, paints sheaths, and wrappings have long proven themselves in practice: 

1.  Bitumen coating.
According to  (ISO 8179/EN 454),       
plus a top bitumen coating of at least 70 µm. Zinc spraying fuses and sprays zinc wire onto the pipe surface. The following bitumen coating comprises a blend of resistant,   tropics-proof bitumen and inert fillers.

2. Zinc coating

One of the particular features of the external zinc coating is its ability to restore the continuity of the protective layer where small areas of local damage exist. The Zn++ ions migrate through the pore sealer to plug the damage and then convert into stable, insoluble zinc corrosion products