Api rp 1124 1991 scan (american petroleum institute)

Ship, Barge, and Terminal Hydrocarbon Vapor Collection Manifolds API RECOMMENDED PRACTICE 1124 FIRST EDITION, MARCH 1991 American Petroleum Institute 1220 L Street, Northwest Washington, D C 20005 11)[.]

Ship, Barge, and Terminal Hydrocarbon Vapor

Collection Manifolds

American Petroleum Institute

1220 L Street, Northwest Washington, D.C 20005

11)

Ship, Barge, and Terminal Hydrocarbon Vapor

API R P * L L 2 4 71 0732290 0076035 7 M

SPECIAL NOTES

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BY API, 1220 L STREET, N.W., WASHINGTON, DC 20005

Copyright 0 1991 American Petroleum Institute

FOREWORD

This recommended practice was developed under the direction of the API Marine Transportation Committee The publication is intended to introduce uniformity in vapor manifold arrangements for tank ships, tank barges, and marine terminals required to installation vapor collection systems for the transfer of cargo vapors

API publications may be used by anyone desiring to do so Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with the publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict Suggested revisions are invited and should be submitted to the director of the Transportation Department, American Petroleum Institute, 1220 L Street, N.W., Washington, D.C 20005

2.3 Spill Tank and Working Platform 4

2.3.1 Spill Tank and Working Platform Details 4

2.3.2 Combined Working Platforms and Spill Tanks 8

4.5 Reducersffixpanders 14

API RP*ll24 71 0732270 0076038 4

Figures

1-Category A Manifold 2

2-Category B Manifold 3

3-Category C Manifold 5

4-Category D Manifold 6

5-Labeling 7

6-Presentation Flange Orientation 10

7-Barge Manifold (up to 10 000 DWT) 11

&Barge Manifold (above 10 000 DWT) 12

Tables 1-Vapor Manifold Spacing 4

2-Loads at Tank Ship Presentation Flange 8

3-Tank Ship Vapor ReducersIExpanders 9

4-Barge Presentation Flange Sizes 12

A P I RP*LL24 '71 0732270 009b039 b

Ship, Barge, and Terminal Hydrocarbon Vapor Collection Manifolds

SECTION 1-GENERAL

1 - - - .I Introduction - - - - - - - be difficult or impossible due to space limitations In

such cases for alternate ;apor line locations

1 I I This recommended practice is intended to intro- are included in 2,2.3.2 for tank ships and 3.2.1 through duce uniformity in vapor manifold arrangements for all 3.2.3 for tank barges,

tank ships, tank barges, and marine terminals required

to install vapor collection systems for the transfer of 1.3.3 This recommended practice is patterned after, cargo vapors ashore or between vessels while loading or and should be used in conjunction with, the Oil

while ballasting in previously loaded cargo tanks panies' International Marine Forum (OCIMF), Stan-

dards for Oil Tanker Manifolds and ~ssociated Equip-

1 I 2 The recommendations in this publication are of- Third Edition, 1988

fered as references and are not necessarily intended to

be mandatory However, in cases where deviations from

these recommendations exist, it is incumbent on the

contracting parties to notify each other and provide as-

surance in advance of cargo operations so that proper

vapor manifold connections can be made

1.2 Background

In 1989, an API-sponsored hazard analysis concluded that overall safety would be enhanced if means were

provided to prevent misconnection between liquid and

vapor collection piping This recommended practice is

intended to provide safeguards against misconnection,

as well as promote a degree of standardization in mani-

fold arrangements

1.3 Scope

1.3.1 The recommendations in this document supple-

ment U.S Coast Guard regulations concerning marine

vapor control systems, contained in Title 33, Code of

Federal Regulations, Parts 154-156 and Title 46, Code of

Federal Regulations, Parts 30, 32, 35, and 39

1.3.2 This recommended practice is intended for use

foi all vessels and terminals required to install vapor

collection systems The recommendations cover all ves-

sel and barge size categories; however, it is recognized

that the application of the proposed piping arrange-

ments and manifold spacings aboard existing vessels may

1.3.4 Specialized tank ships and barges, particularly those employed in chemical and specialty product trades, may require special manifold arrangements Those arrangements are not addressed in this recom- mended practice

1.3.5 This recommended practice does not cover nec- essary safeguards to prevent or control releases, fire, or explosion in vapor control systems

B31.3 Chemical Plant and Petroleum Refinery Piping

( A N S W M E B31.3) Code of Federal Regulations (CFR) Title 33 CFR Parts 154-156 Title 46 CFR Parts 30, 32, 35, and 39 Oil Companies International Marine Forum

Standards for Oil Tanker Manifolds and Associated Equipment, Third Edition, 1988

International Safety Guide for Oil Tankers and Termi- nals

SECTION 2-TANK SHIP VAPOR MANIFOLD STANDARDS

2.1 Ship Tonnage Categories

(Approximate) A 16,000 to 25,000 Summer Figure 1) DWT (metric tons) (see

This section applies to the following categories of B 25,001 to 60,000 Summer DWT (metric tons) (see

1

A P I RP*LL24 91 m 0 7 3 2 2 7 0 0 0 7 6 0 4 0 2 m

API RECOMMENDED PRACTICE 1 124

CARGO CARGO BUNKER VAPOR

5z

MANIFOLD

Figure 1-Gategory A Manifold: Standard Manifold Arrangement for 16,000 to

25,000 Summer DWT (metric tons) Tank Ship

API RP*L124 91 0732270 0076042 b M

C 60,001 to 160,000 Summer DWT (metric tons) 2.2.3.2.2 The vapor manifolds may be located directly (see Figure 3) above the centerlines of the existing bunker lines, a

D Vessels over 160,000 Summer DWT (metric tons) configuration commonly called "piggy-backed." If an (see Figure 4) existing working platform is to be used with a piggy-

backed vapor line, the height of the center of the vapor

2.2 Manifold Position line's presentation flange above the working platform

Vapor manifold presentation flanges should be paral- 2.2.4 NUMBER AND POSITION

lel toand in line with the liquid presentation flanges, 4.6

meters (15.09 feet) inboard from the ship's sides Four vapor connections should be provided, two on

each side of the ship, with presentation flanges at the

vapor connection should be located forward of the mani-

2.2.2.1 The centers of the manifold presentation fold and one located aft of the manifold on each side of flanges should be located at least 700 millimeters (2.30 the ship

feet) above the horizontal projection of the top of the

hose support at ship's side 2.2.5 LABELING

2.2.2.2 Except as specifically provided for in 2.2.3.2, The first 1.0 meters (3.28 feet) inboard of each vapor

manifold connection should be painted on its exterior the height of the centers the presentation flanges

surfaces excluding flange faces The painted area should above the deck should not exceed 2.1 meters (6.89 feet)

be divided into three bands, with the outboard and inboard bands being red in color and 100 millimeters (4

2.2.2.3 The working platform should be fitted to allow

inches) wide and the center band being yellow in wlor

900 millimeters (2.95 feet) between the level of the plat-

In addition, the word 66VApoR,, should be painted in form and the centers of the presentation flanges

black letters at least 50 millimeters (2 inches) high on

panders (both principal and reserve) in approximately

2.2.3.1 The spacing of the vapor manifolds as mea- the two o'clock and ten o'clock positions See Figure 5 sured center to center from the bunker lines along the for illustration

line of presentation flanges should be in accordance with

Table i -

2.3 Spill Tank and Working Platform 2.2.3.2 For retrofit installations aboard vessels where All ships should be provided with permanently fitted significant interferences (for example, winches, hose spill tanks and working platforms under the vapor mani- handling gear, deck houses, etc.) prevent the location of fold connections

the vapor manifolds in accordance with Table 1, the

alternate vapor line locations noted in 2.2.3.2.1 and 2.3.1 SPILL TANK AND WORKING

2.2.3.2.2 may be considered PLATFORM DETAILS

2.2.3.2.1 The vapor manifolds may be located fore and

aft of the bunker lines at some lesser distance than that

prescribed by Table 1 The distance from the bunker

lines, however, should not be less than 1.0 meters (3.28

feet)

Table 1-Vapor Manifold Spacing

Vapor Manifold Spacing Center to Center

2.3.1.1 Size and Position

1 Length: The spill tank and the working platform should extend beyond the vapor connections at the for- ward and after ends of the manifold

2 Width: The spill tank and working platform should have a width of approximately 1.8 meters (5.90 feet) and should be so positioned that about 1.2 meters (3.94 feet)

is outboard of the reducerlexpander presentation flanges

3 Depth: The spill tanks should have a minimum depth

of about 300 millimeters (11.81 inches)

4 Vertical positioning: The working platform should be situated 900 millimeters (2.95 feet) below the level of the centers of the reducerlexpander presentation flanges

A P I R P * L L 2 4 71 0732290 007b044 T

2.1 M (max.)

sz

MANIFOLD

Figure G a t e g o r y D Manifold: Standard Manifold Arrangement for Tank Ships

Over Summer 160,000 DWT (metric tons)

STENCIL

I

A P I RPMLL2q 91 0732270 0076046 3 rn

and the spill tank should be located below the working 2.3.2 COMBINED WORKING PLATFORMS

designed as combined units, the dimensions and The capacity of the spill tank should comply with 33 strength of each should not differ from those outlined in CFR 155.310 2.3.1.1 and 2.3.1.3 In addition, all of the other provi-

sions of 2.3.1 should be followed as closely as possible,

Suitable means of draining the spill tank should be edges

provided Consideration should be given to the particu-

iar type of tank ship, trading, and Eargos which can be 2.4 Vapor ~ ~ ~ i f ~ l d : General

encountered

2.4.1 MATERIAL 2.3.1.4 Strength of Working Platform

The strength and construction of the working platform

and supports should be such that all normal loads en-

countered during hose connection, vapor handling, and

disconnection can be adequately accommodated The

grid forming the working surface should be capable of

withstanding a load of at least 1.0 metric tons per square

meter (1 -42 psi)

2.3.1.5 Design of Work Platform

The working platform surface is to be made from open

mesh grating to allow free passage of any condensate

spilled from the manifold to the spill tank

The grid should have a non-slip surface and should be

removable, in easily handled sections, allowing access to

the spill tank below

The outboard uppermost edge of the working plat-

fondspill tank complex should be fitted with a 50 milli-

meter (2.0 inches) radius rounded edge to protect vapor

hoses during connection and disconnection

The whole vapor manifold, including the manifold support, should be of steel and should conform to the requirements of ANSI B31.3 (1987 edition) All vapor piping should be electrically continuous and bonded to the vessel's hull

2.4.2 STRENGTH

The vapor manifold supports, distance pieces, and reducerslexpanders should be capable of withstanding the loads at the presentation flanges (presentation flange

is defined in 2.5.3.1) as outlined in Table 2

2.5 Vapor Manifold Specifications and Fittings

2.5.1 VALVES 2.5.1.1 Material

The vapor manifold valves should be made of steel and fitted with flanges conforming to ANSI B16.5

A steel stairway of suitable size should be provided at Vapor manifold valve actuators, when fitted, should the forward and aftermost ends of the platform leading be placed on the inboard side of the valve to avoid

to the deck damage and overcrowding during hose handling

Table 2-Loads at Tank Ship Presentation Flanges

Shiv Tonnage Categow

Force based on maximum loads imposed by unsupported loading arms of stated size ( d i n c h e s ) 406.4116 508.0120 609.6124

A P I R P * L L 2 4 7 1 M 0732290 009bOLI7 5 M

SHIP, BARGE, AND TERMINAL HYDROCAABON VAPOR COLLECTION MANIFOLDS 9

presentation flanges for the various tonnage categories Steel distance pieces with outboard flanges conform- should be in accordance with Table 3

ing to ANSI B16.5 should be fitted outboard of the

Under normal circumstances, the principal vapor re- and inboard Of the re- ducerslexpanders should be kept bolted to the distance ducerslex~anders' The inboard conform pieces; and no more than one reducer/expander is per-

to ANSI B16.5 mitted outboard of the distance piece for each manifold

2.5.2.2 Length

2.5.3.5 Material and Design

The length of the distance pieces should be kept to a minimum However, the length of the distance pieces AU presentation flanges should conform to ANSI should be adequate to provide sufficient room: B16.5 They should be kept vertical and should have

plain (flat) faces (that is, raised faced flanges should not

1 To ensure that sufficient space is available for bolt be used)

withdrawal from the valveldistance piece and distance A hazards analysis of vapor control operations has

~iece/reducer/ex~ander flanges A minimum of 200 mil- indicated that the cross-connection of vapor and cargo

limeters (7.87 inches) should be allowed for this purpose systems significantly increases the probability of fire or

on each flange explosion when loading cargo with vapor control In

2 To allow affixing to the manifold support order to prevent the possible misconnection of thevapor

3 TO fit drain line connections which may be required manifold to a liquid loading line a lugged keying Such lines, when incorporated, should be fitted inboard .is, for thevapor presentation flanges is recommended

of the manifold supports Details on the lugged keying mechanism are as follows:

bolts straddle the twelve o'clock position at the top of the

All reducerslexpanders should be made of steel The 2- One cylindrical stud Should be permanently attached inboard flange should conform to ANSI B16.5 and be to each of the presentation flange faces at the twelve made to bolt directly to the distance piece (see 2.5.2) o'clock position on the respective flange bolt circles The outboard flange on all reducerslexpanders should This cylindrical stud should project horizontally out-

be known as the presentation flange board perpendicular to the flange face and be centered

on the same bolt circle as defined in ANSI B16.5 The

ters (0.5 inches) The length of thestud should be at least reducers/expanders should have an overall length 25.4 millimeters (1.0 inches),

Table %Tank Ship Vapor ReducerslExpanders

Principal Fittings

Presentation Flange Reserve Reducer1 Ship Tonnage Number of Nominal Bore Number of Reserve Expanders Stocks Category ReducerslExpanders &inches ReducerlExpanders mmlinches