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Title015-JH-1903 R1 General Instruments
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Total Pages163
Document Text Contents
Page 1

&!ji&L

(4 ,A. $) u&Jl - L b 25s
KUWAIT OIL COMPANY (K.S.C.)

Engineering Group

Specifics tion Number

0 75-JH- 7903

General Instruments

Page 2

I CONTENTS

0 KOC Engineering Group Specjfica&n

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I 1.0 SCOPE 6
1 2.0 STANDARD SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specification Number

01 5-JH-1903

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 SERVICE CONDITIONS 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 External Conditions 7

3.2 Sulphide Stress Cracking Considerations . . . . . . . . . . . . . . . . . . . . 8

4.0 BASIC ENGINEERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 .1 Hazardous Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 Explosive Hazard Protection Methods . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Protection from the Environment . . . . . . . . . . . . . . . . . . . . . . . . . 9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 Utilities 9
4.5 Measurements and Scales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 .6 Connection Sizes and Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7 Instrument Identification 11
4.8 Limitations on Selection and Approved Manufacturers List . . . . . . . . 1 2
4.9 Line Break Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
4 .10 Use of Barrier Glands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 1 Shop Inspection and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 2 Painting and Protective Finishing . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 .13 Packing, Marking and Documentation . . . . . . . . . . . . . . . . . . . . . . 1 4
4 . 1 4 Spare Parts and Maintenance Requirements . . . . . . . . . . . . . . . . . 15

Rev

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 CONTROLVALVES 15
5.1 Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
5 .2 Scope o f Control Valve Selection . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3 Valve Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4 Valve Sizing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.5 Trim Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 .6 Valve Design Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.7 Actuator Selection and Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.8 Actuator Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 0
5.9 Noise, Flashing and Cavitation . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10 Construction Requirements 3 3
5.1 1 Installation Notes. Bypass and Handwheel Philosophy . . . . . . . . . . . 3 5
5 .12 Accessories and Ancillary Items . . . . . . . . . . . . . . . . . . . . . . . . . . 3 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.13 Performance Requirements 4 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 4 Nameplate Data 4 5

6.0 RELIEF AND SAFETY VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6
6.1 Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6
6.2 Scope of Relief Valve Section . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6
6 .3 Relief Applications and Selection . . . . . . . . . . . . . . . . . . . . . . . . . 4 7
6 .4 Sizing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6 .5 Design. Materials and Construction . . . . . . . . . . . . . . . . . . . . . . . 5 2
6.6 Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Date

15-9-94

Sheet

2 of 163

Page 81

b. The use of partially closed valves is not permitted.

8 .5 .10 Range Protection

Engineering Group
Spea'fcathn

a. Pressure instruments shall generally be pressure rated up to
the setting of the system relief valve, or other maximum
pressure that can arise under fault conditions. Where this
would prevent the instrument being suitably ranged for its
process function, the correct range shall be selected and
over-range protection shall be provided.

Rev

1

Specification Number

01 5-JH-1903

b. Over-range protection is not permitted on emergency
shutdown pressure switches.

c. The protectors, or "gauge minders," shall be adjustable (wi th
lock-nut) and shall be of a material equal to that selected for
the instrument wetted parts.

Date

15-9-94

8.6 Installation Notes

Sheet

81 of 163

A piping block valve may be shared by a transmitter and local
gauge, but a shutdown instrument shall have an individual
locked open line class block valve.

Where an instrument is mounted at a distance exceeding 2.5 m
( 8 f t . ) from the primary block valve, an additional block valve
shall be installed adjacent to the instrument. The block valve and
connecting piping shall be line class.

Each direct pressure instrument shall have an individual two-
valve manifold. A five-valve manifold shall be used for DP
application. Low-pressure DP may use a three-valve manifold.
Shutdown manifolds shall be labelled as such and valve handles
removed.

Manifold vents and drains shall be piped t o a safe place or
disposal system except for instruments in non-hazardous service
such as low-pressure non-toxic and non-flammable fluids.

Pressure instruments shall be installed in orientations in
accordance with the Approved Manufacturer's instructions and
shall not be mounted directly on machinery.

Gauges up to 150-mm (6-in.) diameter may be supported direct
from the process pipe work in suitable cases.

Pulsation and gauge minders when required shall be mounted as
close to the instrument as possible.

Page 82

8.6.8 Pressure instruments on LPG or high-pressure steam service shall
be fitted wi th a restriction orifice of 1.44-mm (1116-in.) diameter
downstream of the piping class block valve t o prevent excess
f low in the event of a fracture o f the measuring element.

8.6.9 The transmitter air signal output piping from pneumatic
transmitters shall incorporate a tee wi th valve and plug for
connection o f a calibration gauge.

8.7 Performance Reauirernents

8.7.1 Quality Control (QC)

a. QC shall be as detailed in the Contract. This section states
the minimum additional requirements related to pressure
instruments only and shall not in any way replace or reduce
the general QAIQC requirements.

b. The test and inspection plan shall include the following items
in addition t o those found necessary by the Approved
Manufacturer to ensure the quality o f the product:

A check of the instrument and all accessories in
accordance with this specification and the data sheets
and Drawings.

Full works calibration and issue o f test and calibration
certificate.

A check on the nameplate data in accordance with this
specification and the data sheets and Drawings.

A check on the painting and protection and general
suitability for the environment.

A check on the tagging in accordance wi th this
specification and the data sheets.

8 .7 .2 Documentation

The following data shall be available at final inspection:

a. Completed test and inspection plan.

b. Material certificates and NACE certificates where required by
the Contract.

c. Instrument test and calibration certificate.

d. Hazardous area certificates.

Page 162

21.6 Performance Reauirements

21.6.1 Quality Control (QC)

Engineering Group
specmation

a. QC shall be as detailed in the Contract. This section states
the minimum additional requirements related to local panels
and gauge boards only and shall not in any way replace or
reduce the general QAIOC requirements.

Rev

1

Specification Number

01 5-JH-1903

b. The test and inspection plan shall include the following items
in addition t o those found necessary by the Approved
Manufacturer to ensure the quality of the product:

A check of the dimensions o f the finished items against
the Drawings supplied for the Contract and approved by
the Company.

Date

15-9-94

A check o f the panellcubicle and all accessories in
accordance with this specification and the data sheets
and Drawings.

Sheet

1 6 2 o f 163

Full point-to-point, functional and earth resistance
testing of the panellcubicle in accordance this
specification, the Approved Manufacturer's additional
QA/QC procedures and the approved test and inspection
plan.

A check on the nameplate data in accordance with this
specification and the data sheets and Drawings.

A check on the painting and protection and general
suitability for the environment.

A check on the tagging in accordance wi th this
specification and the data sheets.

21.6.2 Testing

a. LampiPushbutton panels shall be tested by applying
simulated signals and loads at the junction box terminals.

b. Gauge boards shall be tested wi th instrument quality air up
to the rating of the instrument or the air line, whichever is
lower. A soap and water or bubble chamber test shall
confirm the tightness of the joints.

c. Cubicles containing the Approved Manufacturer's amplifying
equipment shall be tested in simulated conditions wi th the
sensor and receiving equipment connected.

Page 163

Specification Number Rev Date
Engineering Group

Sheet

Speaiccation 01 5-JH-1903 1 15-9-94 163 01 163

21.6.3 Documentation

All the certification for each cubiclelpanel shall be collated in a
Data Book which shall be available at final inspection. The book
shall include as a minimum:

a. Completed test and inspection plan.

b. Weld procedures for structural welds.

c. Leak test certificates.

d. Hazardous area certificates.

e. As-built Drawings as necessary.

21.7 Name~late Data

21.7.1 General information for production o f the nameplate data is
given in section 4.7 of this specification.

21.7.2 The proposed title for "Service" of panel front instruments shall
be submitted to the Company for approval.

21.7.3 Front-of-panel labels shall be engraved and infilled stainless
steel. The labels shall be fastened with stainless steel screws.
Adhesive jointing paste shall be used on the rear of the label so
that moisture cannot penetrate behind and cause rust marks at
the screw holes.

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