Piping fabrication and installation procedure

Piping fabrication and installation procedure

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Are you an Engineering professional? Join Eng-Tips Forums! Join Us! By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here. Related Projects. Until now we do not have yet a project that having tie-in work, but we would prepare this procedure for our next project proposal.

I already sent you, Piping Fabrication and Installation Procedure. Thank you with your kind attention.

piping fabrication and installation procedure

This is the link to the original posting. I must confess that since your first posting September I have not given this much thought. I just assumed you had gotten the information you needed and had moved on. My error. Now, I must ask you: Do you currently have a "Design Specification" for normal new project work? If so then I feel that these documents will also cover the issues related to "Cold Tie-Ins" when supplemented with the Planning guidelines I gave you in September 08 see below.

piping fabrication and installation procedure

Tie-In Planning Activity - Responsibility 1. Review with Client - Process Engineer 5. Define if the line can be shut —down, when, how long, draining, depressurizing, steam-out and other safety issues - All personnel Visually inspect the existing pipe. Are more extensive tests needed to determine condition and suitability for the Tie-In - Piping Design and Plant personnel Photograph the Tie-In point - Piping Design Draw sketch and take all required measurements - Piping Design Determine locations of all existing block valves, vents and drains - Piping Design Determine the location of all existing anchors and guides - Piping Design Based on selected Tie-In location and type determine if additional vents or drains will now be required - Piping Design, Plant Operations Include new vents or drains if any on sketch - Piping Design Insure that this process is followed for all Tie-Ins - All participants Your work is very engaging!

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piping fabrication and installation procedure

Piping Fabrication in Accra Ghana Dashinspectorate. Thanks for posting such a nice and valuable information. I like your post. Grooved Fittings in UAE. Thanks for sharing the information Fabrication Drawings preparation in UK. Interesting Content. Please do visit the link below. Fabrication Drawings preparation. The scope of this procedure applies specifically to project, d covers the bonding process techniques and mechanical key lock jointing of RTRP piping.

The methods of jointing shall be mechanical key-lock jointing of bell and spigot type grooved connection and secondly by adhesive bonding of socket and spigot type connection. Taper adhesive type joints also shall be used, if recommended by the vendor.More sophisticated evaluation techniques and economic criteria are needed when decisions have to be made between large, complex piping systems, particularly when the piping systems differ widely in scope, time scale, etc.

Lines in the first group are sized on the basis of available pressure drop, while those in the second must be based on an economical pipe size the smaller the pipethe less the pipe costs but the higher the pumping costs, and thus an optimum size must exist. Paradoxically, however, it is uneconomical to make economic studies on each process line for a proposed plant. The designer, therefore, must have some means of determining which lines justify careful cost analysis.

The designer can select a conservative line size which will definitely fulfill the requirements. But will the next smaller size be more economical? The only manner in which this can be determined definitely is by careful economic analysis. If the possible savinghowever, is not far from the cost in the man-hours required to make the study, it is better to select the conservative size without further use of valuable time. If, on the other hand, the possible savings are substantial, then further detailed study is indicated.

To find out piping erection load b. Manpower planning c. Piping work progress monitoring d.


Find out the inch dia? Ans: Inch dia : size x no. Note : Inch meter will be more relevant in case of yard piping whereas inch dia will be more relevant in case of plant piping. Piping design and engineering: The cost of design work associated with the pipe work including layout studiesscheminganalysis and detailing.

Materials: The cost of all bought out materialsi. Fabrication: The cost of site fabricationoff-site fabrication, done in a shop away and adjacent to site. Erection: The cost of erecting on-site fabricated pipe work and pressure testing. This includes preliminaries, variation orders and error rectification if any. The rates shall be included or excluded, allowances for construction plant, tools, tackle and consumables. Typical rates for various piping materials are enclosed for reference.

These include labour, consumables, tools, tackles and overheads. SS Rs. Find out the labour cost for making a MS reducer of 2" x 4" size? Typically the quantum of pipe fabrication, erection and testing of pipe work shall be expressed as shown below:. SS piping : inch mtr 3. PVC piping : inch mtr 4. Cu piping: inch mtr. If stresses developedthose are to be removed and welded as per standard practice and instructions of the site co-ordinator. Rectifier 2. Transformer 4. Grinders- AG7 5.This content provides you with a sample Piping Fabrication and Erection Specification that is useful for field inspectors.

Piping Fabrication and Erection Specification. This specification covers the minimum basic requirements for various aspects of the above ground piping and in trench piping for the industrial plants as follow:. Sound engineering practice shall be followed in the absence of specified standards or specification subject to OWNER prior approval. SpecificationStandards referred to in this specification shall be the latest editions, including all revisions and addenda as listed below:.

The following specifications are applied as supplement of this specification. Piping Material. Construction Work for Piping. Pressure Test of Piping System. Cleaning for Pipe Lines. Welding Procedure for Piping. Welder Qualification Test.

Piping Design. Painting Specification. The word pipespool, as used in this specification, is a unit of prefabricated piping consisting of pipe, fittings, flanges, and other components integral to the assembly.

This piping is assembled in the shop and conveyed to the construction site for installation.

Method Statement For Spool Fabrication Of Steel Piping

All pipespools to be constructed by the fabricator are listed in the Pipespool Index. Each index is in numerical order for each field assembly area. The shop shall fabricate the pipespools in the order they are listed in the index, unless a list giving some other priority is provided by Consultant. The assembly area, revision date, and material are given at the top of each sheet.

Included with each index for each area is a Pipespool Index Revision page. This page is a record of all revisions to the pipespool index. The shop shall fill out and keep current the information columns on the pipespool indexes, and provide copies to Consultant when requested or completed.

Pipespools in all sizes of butt welded and socket welded construction will be prefabricated in the shop. Threaded piping and threaded components which are installed as attachments to shop fabricated pipespools shall be termed field installed materials.

Straight runs of piping indicated as random piping are not pipespools. These straight runs are installed by the field crews in random lengths.Thanks for any other informative site.

Where else could I get that type of info written in such a perfect way? Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. All permanent materials including fabricated and pre-fabricated supports and consumables to be installed shall be prepared and checked prior to installation works.

Ensure that working areas are ready for installation to include availability of scaffolding if needed, supports and access to avoid delays of the activities.

Ensure that the tapping point and tubing routes are well coordinated with piping, mechanical and related construction group to avoid conflicts that would cause delay in the approved schedule. Study tubing routes and possible locations of supports for fabrication if needed. Should there be discrepancies or obstructions found in the construction drawings, technical queries should be raised to EPC for further site instructions.

Routes of instrument air branch supply lines shall be taken from the top of the header or air manifold that is accessible for maintenance. Upon identification of final specific routes of air piping, fabricate and install corresponding supports and brackets for instrument pipes and tubing as per Saudi Aramco Standard and EPC approved for construction drawing.

Ensure that installed pipes, tubes and its fittings are damage free. Good handling practice shall be adhered to prevent scratches on pipe and tubing. The following points shall be followed. Sufficient measures shall be taken to protect and preserve tubing at site i. All tubing shall be covered with fire blanket when grinding, drilling, and welding works is being carried out in the area.

Tubing shall be installed in a manner that allows for calibration of instrument and removal of adjacent instruments, equipment and tubing. All piping and tubing shall not be pocketed. All tubing shall be installed in a neat manner with no signs of crimping, flattening, or bends with radius too small.

Tubing shall not be marked or scored. Slope angle of tubing shall be minimum 1 For gas and vapor service, pressure transmitters shall be mounted above and as close to pressure taps as possible while still maintaining accessibility. Impulse lines shall slope continuously downward from transmitter to root valve such that they are self-draining minimum one inch per foot.

For liquid or condensing service, pressure transmitters shall be mounted below the pressure taps.The installation of pipe systems follows its fabrication and is very frequently a part of it. The installation of pipe can be accomplished in the following two primary ways, or combinations thereof:. Some contractors prefer to do most, if not all fabrication in the shop, others prefer to set up at the job-site, while others are flexible enough to utilize the best of both methods.

Field fabrication and installation is exactly what it means. The pipe is fabricated on-site, either directly at the place where it is mounted, or in a temporary accommodation in the field.

A number of factors will determine whether it is profitable to fabricate pipe on site: Type of project, size and scope of the project, pipe size and material, accessibility of the equipment, surface treatment after fabrication, weather conditions, availability of qualified personnel, time available to do the job, etc.

Generally speaking, threaded, socketweld, grooved, and other proprietary type joints that do not require buttwelding are field fabricated and installed. A very important aspect is where the work must be done: Into a existing in operation or a new production plant? During the construction of a new plant, the work can generally be carried out in the same way as for example in a fabrication shop. Installation and making field welds require no special authorisation.

Transports with, e. In an existing plant in operation, the conditions are totally different as during construction of a new plant. In general, for all activities work permits are necessary. For activities with open flames welding, cutting etc. The contractor often can not determine when a scheduled task can be performed, because it depends on plant operators, who should or should not give permission for a particular job.

In short, in an existing plant in operation, high risks are present, and the contractor can probably scheduled tasks do not always perform according to his planning. Shop fabrication is, generally speaking, any pipe, fittings and components that are assembled by welding into spool assemblies at the fabricator's facility. The spools are then labeled with an identifier and transported to the job site for installation. This will allow the installer to efficiently stage the piece and ready it for installation.

As part of the process of developing spool sections field-welded joints need to be designated. These are welded joints that connect the pre-fabricated spools. In doing this the designer or fabricator will identify two different types of field-welded joints. The FW indicates a joint in which the end of a pipe segment is prepared for the installer to set in place and weld to its connecting joint without additional modification in the field.

This means that the length of pipe that is joined to another in the field is cut precisely to length and the end prepared in the shop for welding. The FCW provides the installer with an additional length of pipe, usually to mm longer than what is indicated on the design drawings, to allow for field adjustment.

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