Design and construction of waste heat boilers, Mechanical Engineering

Assignment Help:

Shop assembled, steam drum, risers, downcomers, and all other related equipment on the steam side shall be designed, fabricated and hydrostatically tested to all requirements of ASME Section I, Power boilers, henceforth will be known as the Code.

The seller shall also submit for the purchaser's acceptance, mechanical calculations of the WHB system, including exchanger and steam drum support calculations, platform structural calculations, wind and seismic loading to NBC of Canada and finite element analysis.

Corrosion allowances for tubes shall be 1.0 mm (1/32"). Channels and tubesheet corrosion allowances shall be 3.2 mm (1/8") for the process side and 1.6 mm (1/16") for the water side of shell.

External insulation shall not be applied on inlet channel. Unless otherwise stated in the data sheet, insulation on intermediate and outlet channels, on the shell portion of the exchanger, the steam drum, the risers and downcomers shall be provided by others.

The design metal temperature of channels, shell, tubes and tubesheet shall be restricted to 343oC (650oF). However, if tube metal temperature exceeds 343oC (650oF) it shall not be greater than 399oC (750oF). All connections shall be flanged, except risers, downcomers and the combustion chamber connections, which shall be beveled for full penetration welds.

Minimum nozzle size shall be 2" NPS with RFWN rated flanges. Nozzles shall not be located 50 mm (2") of any weld seams. Internal connections when flanged, shall be bolted with non-asbestos type gaskets; i.e., clinger C4400 and using bolting materials - SA 193 B8/304 CL1, 1A and SA 194-8.

The fabricator shall provide operating manuals, which shall be divided into at least four sections:

i. start-up

ii. operation

iii. shutdown and

iv. maintenance and spare parts

Before start-up, the manual shall provide instruction for acid cleaning of inside walls of drum and tubes from dirt and scales by using inhibited acid, passivation by alkaline wash and subsequently clean water flushing. Instruction shall be clear as to the strength of acid and alkaline solutions and quality of flushing water to be used. Furthermore, the manual shall advise whether removal of drum internals during acid cleaning operation is necessary.


Related Discussions:- Design and construction of waste heat boilers

Shielded metal arc welding, Shielded Metal Arc Welding   Single pass...

Shielded Metal Arc Welding   Single pass fillet welds upto ¼" (6.4 mm) maximum and ¼" groove welds made with a single pass or a single pass each side, may be made by using a

Matlab program, write a matlab program to generate shear force diagram

write a matlab program to generate shear force diagram

Form tool design, How to design a flat form tool when the form of the workp...

How to design a flat form tool when the form of the workpiece is given.

Explain concepty of worktable in radial drilling machine, Explain concepty ...

Explain concepty of Worktable in radial drilling machine The worktable is supported on an arm mounted to the column. The worktable can be adjusted vertically to accommodate dis

Fms, fms computer control system

fms computer control system

Thermal, what is Otto cycle?

what is Otto cycle?

Principal planes and principal stresses, Principal Planes and Principal Str...

Principal Planes and Principal Stresses: Define the Principal Planes and Principal Stresses. Sol.: When an element in strained body is under action of plane stresses, it i

Production drawing, use of productin drawing in manufacturing technolagy

use of productin drawing in manufacturing technolagy

Functions of flux coating, FUNCTIONS OF FLUX COATING The coating of the e...

FUNCTIONS OF FLUX COATING The coating of the electrode performs very important functions which are essential for obtaining a weld of required quality; in terms of chemical compos

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd