descon presentation

descon.com

Presentation

descon.com

India

Afghanistan

Fateh Jang

Khanewal

Pakistan

Karachi

Lahore

Footprint - Pakistan

• DEL Offices

• Manufacturing Facilities

• Chemicals Plants

• Power Assets

Corporate Office

Iran

China

Islamabad

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Plant Engineering - Lahore

Design Centres

Total 600 Design Engineers

Plant EngineeringKarachi

Product Engineering Sharjah

Process Equipment Engineering Lahore

Product EngineeringAl Jubail - KSA

Plant Engineering Abu Dhabi

Boiler Engineering Lahore

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Lahore – Pakistan(Boilers & Process Equipment)

Manufacturing Facilities

Hamriyah – Sharjah(Steel Structure, Pressure

Vessels and Skids)

Ruwais– Abu Dhabi(Piping, Furnaces & General

Fabrication)

Al Jubail – KSA(Process Equipment)

Yanbu – KSA(Process Equipment & General Fabrication)

Karachi – Pakistan(Wind Tower, General

Fabrication)

Alkhor – Qatar(General Fabrication)

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Major Resources

• 1,700 engineers & other professionals; Total strength ~ 27,000

• 1,000,000 man-hours/year engineering capacity. • 80 million man-hours/year construction and

maintenance capacity.• 07 manufacturing & fabrication

shops in the region.• Heavy civil work resources.• Own heavy lift and rigging expertise – over

125 cranes• Customized project management systems.• Established QA/QC and HSE systems.

Capabilities

Pressure Vessel Bay

Manufacturing Works

CNC Plate Cutting Machine

Manufacturing Works

Rolling Machine upto 150 mm

Manufacturing Works

02 Nos. Columns & Boom Welding Machines

Manufacturing Works

CNC Drilling Machine

Manufacturing Works

02 x 100 Tons Overhead Cranes

Manufacturing Works

Dishend Forming Machine

Manufacturing Works

Dishend Forming Machine

Manufacturing Works

INTERNAL CLADDING OF DISH ENDS

Manufacturing Works

IN-HOUSE CLADDING

Manufacturing Works

Steel Structure Bay

Manufacturing Works

CNC Beam Drill Line

Manufacturing Works

Manufacturing Works

Post Weld Heat Treatment (PWHT)

Pressure VesselSlug catcherKnock out drumDistillation column

IntroductionworkingoperationDesigningFabricationQuality Control

outline:

PRESSURE VESSEL:A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.

They are used in a variety of industries like

• Petroleum refining• Chemical • Power• Food & beverage• Pharmaceutical

PRESSURE VESSEL:

TYPES OF PRESSURE VESSELS

There are three main types of pressure vesselsin general

• Horizontal Pressure Vessels • Vertical Pressure Vessels• Spherical Pressure vessels

However there are some special types of Vessels like Regeneration Tower, Reactors but these names are given according to their use only.

HORIZONTAL PRESSURE VESSEL

VERTICAL PRESSURE VESSEL

• The max. Shell length to diameter ratio for a small vertical drum is about 5 : 1

TALL VERTICAL TOWER

• Constructed in a wider range of shell diameter and height.

• They can be relatively small in dia. and very large (e.g. 4 ft dia. And 200 ft tall distillation column.

• They can be very large in dia. and moderately tall (e.g. 3 ft dia. And 150 ft tall tower).

• Internal trays are needed for flow distribution.

VERTICAL REACTOR

• Figure shows a typical reactor vessel with a cylindrical shell.

• The process fluid undergoes a chemical reaction inside a reactor.

• This reaction is normally facilitated by the presence of a catalyst which is held in one or more catalyst beds.

SPHERICAL PRESSURIZED STORAGE VESSEL

MAIN COMPONENTS OF PRESSURE VESSEL

Following are the main components of pressure Vessels in general

• Shell • Head• Nozzle• Support

SHELL

It is the primary component that contains the pressure.

Pressure vessel shells in the form of different plates are welded together to form a structure that has a common rotational axis.

Shells are either cylindrical, spherical or conical in shape.

HEAD

• All the pressure vessels must be closed at the ends by heads (or another shell section).

• Heads are typically curved rather than flat.• The reason is that curved configurations are stronger

and allow the heads to be thinner, lighter and less expensive than flat heads.

• Heads can also be used inside a vessel and are known as intermediate heads.

• These intermediate heads are separate sections of the pressure vessels to permit different design conditions.

NOZZLE• A nozzle is a cylindrical component that penetrates

into the shell or head of pressure vessel.• They are used for the following applications.

• Attach piping for flow into or out of the vessel.• Attach instrument connection (level gauges, Thermowells,

pressure gauges).• Provide access to the vessel interior at MANWAY.• Provide for direct attachment of other equipment items

(e.g. heat exchangers).

SUPPORT

• Support is used to bear all the load of pressure vessel, earthquake and wind loads.

• There are different types of supports which are used depending upon the size and orientation of the pressure vessel.

• It is considered to be the non-pressurized part of the vessel.

TYPES OF SUPPORTS

SADDLE SUPPORT:

Horizontal drums are typically supported at two locations by saddle support.

It spreads over a large area of the shell to prevent an excessive local stress in the shell at support point.

One saddle support is anchored whereas the other is free to permit unstrained longitudinal thermal expansion of the drum.

TYPES OF SUPPORTS

LUG SUPPORT: Vertical pressure vessels may also be

supported by lugs.

The use of lugs is typically limited to pressure vessels of small and medium diameter (1 to 10 ft)

Also moderate height to diameter ratios in the range of 2:1 to 5:1

The lugs are typically bolted to horizontal structural members in order to provide stability against overturning loads.

TYPES OF SUPPORTSLEG SUPPORT:

Small vertical drums are typically supported on legs that are welded to the lower portion of the shell.

The max. ratio of support leg length to drum diameter is typically 2 : 1

Reinforcing pads are welded to the shell first to provide additional local reinforcement and load distribution.

The number of legs depends on the drum size and loads to be carried.

Support legs are also used for Spherical pressurized storage vessels.

Cross bracing between the legs is used to absorb wind or earth quake loads.

TYPES OF SUPPORTSSKIRT SUPPORT:

Tall vertical cylindrical pressure vessels are typically supported by skirts.

A support skirt is a cylindrical shell section that is welded either to the lower portion of the vessel shell or to the bottom head (for cylindrical vessels).

The skirt is normally long enough to provide enough flexibility so that radial thermal expansion of the shell does not cause high thermal stresses at its junction with the skirt.

Designing According to code of ASME BPVC Section II, EN 13445-2.

Fabrication:Fit-upCuttingSub Arc WeldingManual/Hand WeldingGrindingHeat TreatPipe WorkStructuralBlastingPaintingHydroAssembly

Quality control: NDT,Hydro test,PWHT.

Slug catcher:Slug catcher is the name of a unit in the gas refinery or petroleum industry in which slugs at the outlet of pipelines are collected .

Operation:

• A single phase flow is rarely found in the oil industry.

singlephase flow:

• The high pressure in the reservoir will cause a portion of the gas from the gas cap to get dissolved in the oil or water to be dissolved in the gas.

•As the pressure is reduced due to production, the gas will come out of solution similarly, water will come out of solution in the form of water droplets.

Multiphase flow:•Six different patterns can appear in the horizontal pipe and are represented in Figure.

slug formation:

• The slug formation is a three step process that is represented in Figure :

• The first pipeline section shows a stratified flow where the gas is overlying the liquid and usually flowing at a higher velocity.

Slug formation:

• The interface between these two phases is not a straight line but a wave-like boundary.

Working:

Designing: According to the ASME B31.3.1- Determining the functions of the slug catcher2- Determining the location of the slug catcher3- Selecting the primary configuration of the slug catcher4- Compiling the design data5- Establishing the design criteria

Fabrication: Fit-upCuttingSub Arc WeldingManual/Hand WeldingGrindingHeat TreatPipe WorkStructuralBlastingPaintingHydroAssembly

Quality control: NDT,Hydro test,PWHT.

Knock out drum:K O drum is a device used in several industrial applications to separate a vapor–liquid mixture.it is also called vapor–liquid separator.

Working:For the common variety, gravity is utilized in a vertical vessel to cause the liquid to settle to the bottom of the vessel

Designing: According to the ASME SEC V111 DIV 1.

Fabrication: Fit-upCuttingSub Arc WeldingManual/Hand WeldingGrindingHeat TreatPipe WorkStructuralBlastingPaintingHydroAssembly

Quality control: NDT,Hydro test,PWHT.

DISTILLATION COLUMN:Distillation column is one of the unit operations of chemical engineering.it is used to distill the liquid. Such industries are the petroleum processing, petrochemical production, natural gas processing, coal tar processing.

Types of distillation column:Batch Distillation Column: • Batch Distillation Column is charged with a 'batch' and then the distillation

process is carried out. 

Continuous Distillation Column:• Continuous Distillation Columns process a continuous feed

stream.

• The two major types of Continuous Columns are:Tray Column:

• Tray columns consist of physically separated pools of liquid which are in intimate contact with a vapor

Packed Column:

• Packed columns are filled with a saddle shaped packing.

• This packing provides a lot of surface area for the vapor to condense upon and assures that the liquid and vapor are in intimate contact

Working:Distillation is one of the most common and energy-intensive separation processes.

Designing: According to the ASME SEC V111 DIV1.1- Determining the functions of the distillation column.2- Determining the location of the distillation column.3- Selecting the primary configuration of the distillation column.4- Compiling the design data5- Establishing the design criteria• Column height/diameter• Number of Plates• Plate height• Size of the re-boiler• Size of Condenser• Batch or Continuous• Piping

Fabrication: Fit-upCuttingSub Arc WeldingManual/Hand WeldingGrindingHeat TreatPipe WorkStructuralBlastingPaintingHydroAssembly

Quality control: NDT,Hydro test,PWHT.

Process Equipment

Pressure Vessels & Columns……CLIENT / OWNER : HYUNDAI E & C (HDEC)

PROJECT : BOROUGE-3 UTILITIES & OFFSITES

EQUIPMENTS : Design, Fabrication & Supply of 37 VESSELS, 02 COLUMN & 01

REACTOR

Specifications:

- DESCRIPTION :CRACKER & 1-BUTANE FLARE K.O DRUM

- DIMENSIONS (LXWXH) : 28m x 6m x 7m

- VESSEL ID : 5.3m- MATERIAL OF SHELL : SA 516 Gr.70 (N) MTLTV- MAX. THICKNESS : 52MM- DESIGN CODE : ASME SEC VIII DIV.1 ED. 2010- ASME STAMP : YES- QUANTITY :01- WEIGHT : 137,500 KG

Pressure Vessels & Columns……CLIENT / OWNER : SALINE WATER SPECIALISTS (SWS)

PROJECT : IGD, HABSHAN 5 UTILITIES & OFFSITE

EQUIPMENT : BFW DEAERATOR

Specifications:

- DIMENSIONS : 4400 MM ID X 22.5 MTR LG

- MATERIAL OF SHELL : SA 316 Gr. 65 - DESIGN CODE : ASME SECTION VIII, DIV. 1 - ASME STAMP : “U”- QUANTITY : 03 NO. - WEIGHT : 213TONS

Pressure Vessels & Columns……CLIENT / OWNER : LITWIN

PROJECT : IQI- RUWAIS REFINERY, TAKREER

EQUIPMENT : DESIGN, FABRICATION & SUPPLY OF NAPHTHA SPLITTER COLUMN

Specifications- DIMENSIONS : ID 3505 MM ID X 20520MM LG

- MATERIAL OF SHELL : SA516 Gr. 65N- DESIGN CODE : ASME SEC. VIII DIV 1- ASME STAMP : U-STAM- QUANTITY : 01- WEIGHT : 52.86 TONS

Pressure Vessels & Columns……Client / Owner: Ruwais Fertilizer Industries (Fertil)

Project: Urea Debottlenecking Project

Equipment: CO2 Absorber

Specifications- Dimensions: 4200mm ID x 40 Mtr LG- Material of Shell: A 516, Gr.60 / A 240 TP 316 L - Design Code: ASME Section VIII, Div. 1 - Quantity: 01 No.- Weight: 190 Tons

Pressure Vessels & Columns……Client / Owner: Ruwais Fertilizer Industries (Fertil)Project: Urea Debottlenecking ProjectEquipment: Fuel Gas Quencher

Specifications:- Dimensions: 4200 mm ID x 25 Mtr LG- Material OF Shell: A 240 TP 316 L- Design Code: ASME Section VIII, Div. 1

- Quantity: 01 No.- Weight: 108 Tons

Pressure Vessels & Columns……Client / Owner: Ruwais Fertilizer Industries (Fertil)

Project: Urea Debottlenecking Project

Equipment: Distillation Column

Specifications:- Dimensions: 2000 mm ID x 25 Mtr LG- Material of shell: A 240 TP 316 L - Design Code: ASME Section VIII, Div. 1 - ASME Stamp: “U”- Quantity: 01 No.- Weight: 85 Tons

Heat Exchanger……CLIENT : QATAR FUEL ADDITIVES CO., LTD (QAFAC)OWNER : QATAR FUEL ADDITIVES CO., LTD (QAFAC)PROJECT : QATAR MATHANOL / MTBE FACILITY, QATAR YEAR : 2009

Specifications:- DIMENSIONS : 1200mm ID x 3 Mtr LG

- MATERIAL OF SHELL : SA516 Gr. 70 / SA266 Gr.2

- QUANTITY : 02 NO.

- WEIGHT : 34TONS

Heat Exchangers…Client: Sidem, France

Owner: Fujairah Asia Power Company

Project: Fujairah 2 IWPP Project

Equipment: STEAM TRANSFORMER

Specifications:

- Dimension 18.4 m X 5.5 m- Material A 516 Gr. 70- Weight: 120 Tons- Quantity 12 Nos.

OffshoreCLIENT / OWNER : LAMPRELL plc / SEAJACKS

PROJECT : SEAJACKS ZARTAN

EQUIPMENT : SPUDCANS (BASE FOR JACK-UP RIG)

Specifications:

- DIMENSIONS : 7.8 M X 7.8- MATERIAL OF SHELL : AH / EH / DH 36 (MARINE GRADE)- 3rd PARTY INSPECTION : ABS (AMERICAN BUREAU OF SHIPPIING - QUANTITY : 04 Nos.- WEIGHT : 412 TONS