1、Recommended Practice for Transportation of Line Pipe on Barges and Marine VesselsAPI RECOMMENDED PRACTICE 5LWTHIRD EDITION, SEPTEMBER 2009REAFFIRMED, MAY 2015Recommended Practice for Transportation of Line Pipe on Barges and Marine VesselsUpstream SegmentAPI RECOMMENDED PRACTICE 5LWTHIRD EDITION, SE
2、PTEMBER 2009REAFFIRMED, MAY 2015Special NotesAPI publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed.Neither API nor any of APIs employees, subcontractors, consultants, committees,
3、or other assignees make any warranty or representation, either express or implied, with respect to the accuracy, completeness, or usefulness of the information contained herein, or assume any liability or responsibility for any use, or the results of such use, of any information or process disclosed
4、 in this publication. Neither API nor any of APIs employees, subcontractors, consultants, or other assignees represent that use of this publication would not infringe upon privately owned rights.Classified areas may vary depending on the location, conditions, equipment, and substances involved in an
5、y given situation. Users of this recommended practice should consult with the appropriate authorities having jurisdiction.Users of this recommended practice should not rely exclusively on the information contained in this document. Sound business, scientific, engineering, and safety judgement should
6、 be used in employing the information contained herein.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
7、 connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any authorities having jurisdiction with which this publication may conflict.API publications are published to facilitate the broad avail
8、ability of proven, sound engineering and operating practices. These publications are not intended to obviate the need for applying sound engineering judgment regarding when and where these publications should be utilized. The formulation and publication of API publications is not intended in any way
9、 to inhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirements of that standard. API does not represent, warrant, or guarantee t
10、hat such products do in fact conform to the applicable API standard.All rights reserved. No part of this work may be reproduced, translated, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from
11、 the publisher. Contact the Publisher, API Publishing Services, 1220 L Street, NW, Washington, DC 20005.Copyright 2009 American Petroleum InstituteForewordNothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use
12、 of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent.Shall: As used in a standard, “shall” denotes a minimum requirement in order to conform to the sp
13、ecification.Should: As used in a standard, “should” denotes a recommendation or that which is advised but not required in order to conform to the specification.This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental
14、process and is designated as an API standard. Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which this publication was developed should be directed in writing to the Director of Standards, American Petroleum Insti
15、tute, 1220 L Street, NW, Washington, DC 20005. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. A one-time
16、 extension of up to two years may be added to this review cycle. Status of the publication can be ascertained from the API Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is published annually by API, 1220 L Street, NW, Washington, DC 20005.Suggested revis
17、ions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW, Washington, DC 20005, standardsapi.org.iiiContentsPage1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . . . . . . 12 Acronyms, Abbreviations, and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、. . . . . . . . . . . . . 13.1 Vessel Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2 Shipping Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.3 Handling Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.4 Stacking Arrangement . . . . . . . . . . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.5 Bearing and Separator Strips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.6 Side Protection . . . . . . . . . . . . . . . .
22、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.7 Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Transit
23、Fatigue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24、. . . . . . . . . . . . . . . . . 5Figures1 Cantline Stowage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3vIntroductionThis recommended practice (RP) shall become effective on the date printed on the
25、 cover but may be used voluntarily from the date of distribution. This RP is under the jurisdiction of the API Subcommittee on Standardization of Tubular Goods. Line pipe shipments on inland and marine waterways should be designed to assure that the pipe will arrive at the destination undamaged. The
26、 minimum mandatory rules in force for such shipments shall be followed. The rule of governing regulatory agencies shall be considered as basic, with the recommendations given herein as supplementary thereto. These supplementary recommendations are the result of line pipe shippers experience that dam
27、age to the pipe during shipment can consist of three principal types as follows.a) End DamageEnd damage to pipe can occur during loading and unloading, or from a longitudinal load shift against a bulkhead or an adjacent pipe.b) Abrasions or PeeningThese result from a rubbing or pounding action again
28、st some protrusion such as the weld reinforcement of the adjacent pipe. This condition may result in initiation of fatigue cracks at the damaged areas during transit.c) Longitudinal Fatigue CracksThese are initiated in the pipe by vertical cyclical forces with no apparent local abrasion or denting.
29、Fatigue cracks result from a combination of static and cyclic stresses produced by the weight of upper layers of pipe and/or other cargo giving a static load, and a cyclic load caused by the vertical movement.The third edition of this RP incorporates revisions in light of an identification of inaccu
30、racies in the equations for static load stress, which were derived by numerical methods decades ago. These inaccuracies were discovered when finite element analysis methods were used to check the equations. API is working to update and revise these equations for a future edition. Notwithstanding the
31、se inaccuracies, there have been no confirmed transit fatigue failures reported in pipe loaded in accordance with previous editions of this document.vi1Recommended Practice for Transportation of Line Pipe on Barges and Marine Vessels1 ScopeThe recommendations in this document apply to transportation
32、 of API Specification 5L steel line pipe by ship or barge on both inland and marine waterways, unless the specific requirement of a paragraph in this document references only marine or only inland waterway transport. Inland waterways are defined as those waterways with various degrees of protection,
33、 such as rivers, canals, intracoastal waterways, and sheltered bays. These waterways can be fresh or saltwater but are usually traversed by barges. Marine waterways are defined as waterways over open seas with limited or no protection from wind, current, waves, and the like. These areas are normally
34、 traversed by sea-going vessels. These recommendations apply to steel line pipe that has 2 3/8-in. outside diameter (OD) and larger.These recommendations cover coated or uncoated pipe, but they do not encompass loading practices designed to protect pipe coating from damage. These recommendations are
35、 not applicable to pipe-laying vessels or supply vessels. They must be considered as supplementary to the existing rules of governing agencies.These recommendations are supplemental to shipping rules for the convenience of purchasers and manufacturers in the specification of loading and shipping pra
36、ctices and are not intended to inhibit purchasers and manufacturers from using other supplemental loading and shipping practices by mutual agreement.2 Acronyms, Abbreviations and SymbolsD specified outside diameterGMAW gas metal arc weldingOD outside diameterSAW submerged arc weldingt specified wall
37、 thickness3 General Requirements3.1 Vessel ConditionCargo compartments should be reasonably free from any foreign objects or material likely to cause either physical damage, contamination, or chemical reaction with the pipe. The bilge pumping system shall be in working order to remove standing water
38、 from the cargo hold.3.2 Shipping SpacePipe may be laid longitudinally or athwart the vessel to make the best use of available space. A clearance of 1 ft must be left between the ends of the pipe and the vessel (or other cargo) to facilitate unloading. Dimensions of hatchways should be large enough
39、to allow the pipe to pass in a horizontal position unless special precautions are taken.3.3 Handling EquipmentWhen end hooks are used for handling pipe, they shall be designed to prevent end damage and should be lined in the area of land (bevel face) contact with a cushioning material (e.g. a nonmet
40、allic material such as rubber or a metallic material such as aluminium, but brass or copper shall be excluded). These hooks shall also have sufficient width and depth to fit the internal curvature of the pipe. Rubber aprons should be attached to pipe hooks to protect the pipe ends unless adequate en
41、d protectors are used. Lifting shall be carried out in such a manner that impact loads sufficient to 2API RECOMMENDED PRACTICE 5LWcause local denting or out-of-roundness of pipe body or pipe ends will not occur. When the pipe is loaded by loose lifts, all necessary precautions shall be taken during
42、loading and unloading to prevent surface or other damage to the pipe.3.4 Stacking Arrangement3.4.1 StowageWhen stacking, one should consider the maximum weight that the bottom layer of pipe can withstand before deformation will occur. Short lengths should be placed on the top of the stack.Pipe in th
43、e hold of a vessel during marine shipments shall be cantline stowed.Cantline stowage shall be defined as stowage without separator strips (e.g. nesting or pyramid fashion) but including wood blocking every other tier on both sides of the hull as illustrated in Figure 1. If the top tier is a partial
44、load, separator strips shall be used to secure additional blocking, which is used to secure the top tier of pipe.For inland waterway transit, pipe may be cantline stowed, or separator strips may be used between successive tiers of pipe.Loaded pipe shall not contact the sides or bottom of the vessel.
45、 However, each length of pipe shall be in contact throughout its entire length with all adjacent pipe or blocking, and precautions should be taken to minimize any lateral movement.Pipe with filler metal weld seams (SAW and GMAW) shall be positioned or padded in such a manner that the weld does not c
46、ontact the blocking or adjacent pipe. When horizontal stripping (permissible only for transportation on inland waterways) is used to load pipe with longitudinal seam welds made with filler metal (SAW and GMAW), the weld seam shall be positioned at 45, 5, from vertical. When nested, pipe with longitu
47、dinal seam welds made with filler metal (SAW and GMAW) shall be positioned with the seam at 0 (in other words, 12 oclock).3.4.2 Loading on DeckThe pipe shall be placed on a horizontal surface, and the building of a wooden floor is recommended to eliminate contact of the pipe with metallic protrusion
48、s and to compensate for inclined planes. There shall be a sufficient number of stanchions for the pipe to rest against. If the stanchions are metallic, wood or rubber strips shall be interposed between them and the pipe. Stowing cables or chains shall be isolated from any contact with pipe through a
49、 protection medium such as rubber strips. During transportation, the tension of stowing cables or chains should be checked daily.3.5 Bearing and Separator StripsWood-bearing and separator strips shall be a minimum size of 1 in. 2 in. Metallic-bearing strips are prohibited. Bearing strips shall be used to keep the bottom layer of pipe above the hold bottom. The spacing of these strips should be as small as necessary but no greater than 4 ft and at least four bearing strips per pipe stack must be used unless otherwise agreed as allowed in Section 4. For inland-waterway shipment
