STANDARD SPECIFICATION FOR IMPULSE PIPING & TUBING DOCUMENT NO : 44-LK /J.02/0015-A4

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1 Page 1 of 5 STANDARD SPECIFICATION FOR IMPULSE PIPING & TUBING DOCUMENT NO : 44-LK /J.02/0015-A4 Rev No. Issue Date Pages Rev Description Prepared A Issued for Comments / Approval Checked Approved RCK GDR BSP

2 DOCUMENT NO :44-LK /J.02/0015-A4 Date : STANDARD SPECIFICATION FOR IMPULSE PIPING & TUBING Page 2 of PURPOSE 2.0 SCOPE 3.0 TECHNICAL REQUIREMENTS TABLE OF CONTENTS 3.1 INSTRUMENT VALVES & MANIFOLDS 3.2 IMPULSE PIPING / TUBING 3.3 PIPES AND TUBE FITTINGS 3.4 PNEUMATIC SIGNAL TUBES 3.5 INSTRUMENT AIR LINES FITTINGS AND VALVES 3.6 AIR FILTER REGULATORS 4.0 RELATED DOCUMENTATION 5.0 ATTACHMENTS

3 DOCUMENT NO :44-LK /J.02/0015-A4 Date : STANDARD SPECIFICATION FOR IMPULSE PIPING & TUBING Page 3 of PURPOSE 2.0 SCOPE The purpose of this specification is to define the minimum requirements of design and manufacture of instrument hook-up tubes / pipes, fittings and valves. The scope of work shall include design, manufacture, testing and supply of instrument tubes and fittings. The inspection requirements shall be as per the inspection plan. 3.0 TECHNICAL REQUIREMENTS 3.1 INSTRUMENT VALVES AND MANIFOLDS Contractor shall supply instrument valves (miniature type) and valve manifolds wherever required Body rating shall be as per piping class or better. All valves and manifolds shall be forged type only Valve body and trim material shall be 316 SS unless otherwise specified. Superior trim material shall be selected as required by process conditions. Packing material in general shall be of PTFE For instrument air isolation valves, body and trim material shall be SS Contractor shall supply a minimum of 20% instrument valves and manifolds as spare. 3.2 IMPULSE PIPING / TUBING Where tubing is used contractor shall provide 1/2" OD x 0.049" thick ASTM A 269 TP 316 stainless steel fully annealed, cold drawn and seamless tubes as a minimum for impulse lines upto 600# class. Higher thickness according to pressure rating shall be considered for higher pipe classes Monel or other tubing shall be used where 316 SS is not suitable for the service SS tubes shall have a hardness of Rockwell RB Steam tracing shall be 10 mm OD hot annealed copper tubes of electrolytic grade copper with wall thickness of 1 mm as per ASTM B68M copper no. C Instrument air distribution shall be done with 6 mm OD tubes of SS. Higher size shall be considered where needed to achieve desired stroking time of control valve Contractor shall supply a minimum of 20% of pipe / tubes as spare In general impulse piping shall be close coule type All piping shall be ½ NB of SS 316 as minimum or higher MOC as per piping class of the pipe on which the instrument is connected. Higher sizes of ¾ NB, 1 ½ NB as the case may be also be considered. In case of vessel/ equipment / reactor piping shall be corresponding equivalent piping class.

4 DOCUMENT NO :44-LK /J.02/0015-A4 Date : STANDARD SPECIFICATION FOR IMPULSE PIPING & TUBING Page 4 of PIPES AND TUBE FITTINGS Contractor shall supply flareless compression type of tube fitting with three-piece construction of Swagelok / Parker Hannifin make The fitting / ferrule hardness shall be in the range of RB so as to ensure a minimum hardness difference of 5 to 10 between tube and fittings. The ferrule shall be of stainless steel material, in general Socket-weld type forged pipe fittings of suitable material and rating shall be supplied for pipe fittings. The minimum rating shall be 3000 lbs. Weld neck fittings shall be used where socket weld type is not allowed by piping class Instrument air fittings shall be of SS 316 only All threaded fittings shall have NPT threads as per ANSI / ASME B16.11 only Contractor shall supply a minimum of 20% of each type of pipe / tube fittings as spare All pipe fittings shall be according to piping material specification as per piping class of the pipe on which instrument is connected. In case of vessel / equipment / reactor, PMS of equivalent piping class shall be considered. 3.4 PNEUMATIC SIGNAL TUBES Generally Contractor shall supply 6 mm OD SS tubes for pneumatic signal tubes. 12 mm OD SS tubes shall be considered, as required Contractor shall avoid use of intermediate connections and shall estimate single length for each instrument location Contractor shall supply a minimum of 20% length of these tubes as spares. 3.5 INSTRUMENT AIR LINES FITTINGS AND VALVES Seamless galvanised, inside and outside, carbon steel pipes main instrument air header shall be as per IS:1239 J3A pipe class Galvanised forged screwed carbon steel screwed fittings of 2000 lbs rating fittings shall be used Isolation valves on instrument air service shall be packless gland type full bore ball valves All branch instrument air lines including isolation valves shall be SS Contractor shall supply a minimum of 20% of air pipe, fittings and valves as spare. 3.6 AIR FILTER REGULATORS Instrument air filter regulator of suitable size, range and capacity shall be supplied for each pneumatic instrument The body of the filter shall be anodised aluminium.

5 DOCUMENT NO :44-LK /J.02/0015-A4 Date : STANDARD SPECIFICATION FOR IMPULSE PIPING & TUBING Page 5 of The filter for AFR is to be 5 micron in case it is used along with E/P or I/P. In other cases it may be 25 micron or as per requirement Contractor shall supply a minimum of 20% of air filter regulators of each size and range as spare. 4.0 RELATED DOCUMENTATION Nil 5.0 ATTACHMENTS Nil