PROJECTS & DEVELOPMENT INDIA LIMITED - …

1 ENGINEERING STANDARDPIPING DESIGNISSUE : JAN. 98ES 6001 PROJECTS & DEVELOPMENT INDIA LIMITED DKM\DAYTODAY\STANDARD\ , BKI, MKDFOR IMPLEMENTATION JAN. 980 FORM NUMBER 02-0000-0021 F1 REV 0 This document is the property of PROJECTS & DEVELOPMENT INDIA LIMITED (PDIL) and not to be copied or reproduced or shown to third parties without the written permission of OF between allowance on wall Guide lines for routing of pipe for different piping Fittings and blinds (Ring and Disc) Control Block and Expansion of for and Steam Driven to Drinking , Anchors and Connections and UtilitiesSHEET 1 OF 18 ISSUE : JAN. 98ES 6001 ENGINEERING STANDARDPIPING design PDIL This document is the property of PROJECTS & DEVELOPMENT INDIA LIMITED (PDIL) and not to be copied or reproduced or shown to third parties without the written permission of Showers and Eye requirements for Toxic, Hydrocarbon and Flamable 2 OF 18 ISSUE : JAN.

2 98ES 6001 ENGINEERING STANDARDPIPING design PDIL This document is the property of PROJECTS & DEVELOPMENT INDIA LIMITED (PDIL) and not to be copied or reproduced or shown to third parties without the written permission of specification covers general design requirements with respect to layoutand details for piping SpecificationThis specification may be supplemented by special requirements for aparticular job, in which event the later shall take pracedence in case of for design , fabrication and erection of non IBR piping systems shall bein accordance with ASME B Process Piping Code latest edition and thosefor IBR piping shall be in accordance with Indian Boiler STANDARDSASME B - Process Piping CodeIBR - Indian Boiler Regulations PDIL Engineering Standards ES 6002 -- General Piping SpecificationES 6012 -- Safety Valve Installation and PipingES 6029 -- Steam trap InstallationPDS.

3 P (V 004)-- Dimension of Control Valve manifold P 032 -- Pipe trench P 123 -- Vent, drain, steam trap and Instrument tapping assemblies PS 01 -- Pipe support - Standard type and applications PS 02 -- Pipe spacing ST 202 -- Details of sump for installation of Gate Valve (a)Walkways and PlatformsThe minimum clear headroom over main walkways, passageways andworking areas at grade or floor elevations shall be m. Theminimum clearance over secondary walkways and elevated platforms,SHEET 3 OF 18 ISSUE : JAN. 98ES 6001 ENGINEERING STANDARDPIPING design PDIL This document is the property of PROJECTS & DEVELOPMENT INDIA LIMITED (PDIL) and not to be copied or reproduced or shown to third parties without the written permission of and working areas shall be m.

4 The minimum width formain walkways shall be m. The minimum width for secondary walksand minor access points shall be m. The minimum width forcatwalks shall be m. ( )(b)Roads and Rail RoadsThe minimum clear head room over rail roads shall be m measuredfrom the top of track. The minimum clearance over primary roadwaysshall be m. Secondary roads may have lower clearance, but not lessthan m. Minimum clear head room over areas designated as mainaccess ways or tracking areas (other than roads) shall be m.(c)EquipmentClearance should be available for maintenance and removal ofequipment without disturbing other equipment. Dismantling of sections ofpipe is permissible, if required for removal of equipment, when notoperating. Piping to equipment shall be designed to permit readyremoval of equipment without further pipe supports being required,Particular attention should be paid to layout of cable racks, instrumentpiping, etc.

5 To ensure areas where entry of handling equipment ( Forklift truck or 5tCrane) is required for maintenance or handling of pumps and othermachinery not otherwise accessible, the minimum clear head room forpiping under which the handling equipments are required to move shallbe and other access openings shall have a minimum clearance metre in front of face of vessel or equipment flange (not cover platewhere larger clearance may be required), and a minimum of m fromedges of flanges to nearest pipe or construction.(d)Minimum Clearance for Piping Above GradeUsually bottom most part of any line is provided with a drain line. Tofacilitate proper draining (may be to a catch pot, in some cases) andproper supporting arrangement of the pipe the bottom of pipe shouldnormally be kept at a minimum elevation of 400 mm from finished floorlevel.

6 Where this is not possible elevation may be lowered to even 150mm giving due care to proper draining and supporting of pipes. Thisdoes not apply to drain pipes. Insulation and valves, should be taken inconsideration while determining this clearance. In case of control valves,the minimum clearance shall be as per PDS: V 4 OF 18 ISSUE : JAN. 98ES 6001 ENGINEERING STANDARDPIPING design PDIL This document is the property of PROJECTS & DEVELOPMENT INDIA LIMITED (PDIL) and not to be copied or reproduced or shown to third parties without the written permission of Between PipingIn consideration of maintenance, the flange, or heat insulation, etc. theclearance between pipe surfaces should be sufficient but minimum for clearances are shown in PDS: PS 02.

7 The clearance indicated in PDS: PS02 are minimum and shall have to be increased where large lateral thermalmovements are involved, particularly where high temperature pipes are takinga 90O turn. Vertical pipe lines through floors shall be combined to reduce theopening size in AllowedIn general, no piping less than // shall be used except for instrument //, 3 // and 5// pipe sizes normally should not be used. Where such sizesare used, valves should be of 1//, 3// and 4// material shall be selected in accordance with respective piping may be made to General Piping Specification - Piping Element datasheet for selection of appropriate piping classification number for the specifiedservice conditions. Where system of higher service rating tie into systems oflower rating, an isolation valve shall be provided and the higher service ratingspecification shall be continued including the isolation Allowance on Wall ThicknessThe minimum corrosion allowance for piping shall be as follows:Cast iron and carbon steel piping -- 1mmCorrosion resistant materials, including aluminimum, alloy steel, high nickelalloys and copper -- Ground PipesIn general, pipes should not be buried unless a specific advantage likeprotection freezing, fire or accidental damage or easy drainage by gravity flowetc.

8 Are gained. Traditionally the following lines may be buried:(a)Cooling water distribution headers.(b)Fire Water mains(c)Sewage Lines(d)Drain lines (where gravity flow requirement necessitates the lines to be burried).SHEET 5 OF 18 ISSUE : JAN. 98ES 6001 ENGINEERING STANDARDPIPING design PDIL This document is the property of PROJECTS & DEVELOPMENT INDIA LIMITED (PDIL) and not to be copied or reproduced or shown to third parties without the written permission of in Trenches(a)All piping requiring inspection and servicing or being provided withprotective heating and located below grade shall be in trenches.(b)Pipe trenches shall be sufficiently large to allow for repair of lines andshall be provided with removable covers. Typical trenches details havebeen indicated in PDS: P 032.

9 Sump for valves and trenches shall be asper PDS: ST 202 & ST piping shall be done as per ES 6018. However, some ofgeneral precautions to be taken are as follows:i)Provide casing pipe made of reinforced concrete or Carbon Steelto protect underground pipes passing under roads or )Wherever electrical cables are coming on the way of pipes, pipeswill be taken below the )Wherever valves are to be provided, valve chamber of suitablesize should be constructed of brick or )Pipes shall clear the fouling with trench foundations and layout oftrench will be such as not to interfere with construction )Trenches shall be provided with proper slope and suitabledraining Guide Lines for Routing of Pipe Lines(a)Pipe lines shall be installed neatly so as to be as short and direct aspossible, with a minimum of directional changes.

10 The flexibility shall beconsidered while deciding the routing of hot pipe lines.(b)Dead legs and pockets shall be avoided. This is important in case ofpipe line containing slurries or suspensions, fluids of high crystallizationpoint, corrosive fluids etc.(c)Overflow lines, drain lines, barometric lines from condensers etc. shouldbe as steep as possible. Barometric lines should preferably be installedvertical, if this is not possible, one of the two alternatives indicated can be adopted.(d)All piping within battery limits shall be elevated to provide minimum clearhead room as indicated in section unless process considerationindicates otherwise, in pump suction lines.(e)Main service pipes, such as HP and LP steam condensate, fuel oil,town s water, cooling water, town s gas, compressed air etc.