It is also important to note that poor loading or shipping practices may lead to serious damage that may result in pipeline leaks or ruptures. These hooks shall also have sufficient width and depth to fit the internal curvature of the pipe. No practical application to predict the static load stresses on line pipe being transported by truck on highways has been developed because it was believed the highway transport distances were not sufficient to represent potential for a significant amount of pipe damage.
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These hooks shall also have sufficient width and depth to fit the internal curvature of the pipe. Or Sign up using Facebook. Other g factors not less than 0.
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Evaluation of the Need for Loading Specifications for Highway Transport of Line Pipe | PRCI
These recommendations are supplemental to shipping rules for the convenience of purchasers dp manufacturers in the specification of loading and shipping practices and are not intended to inhibit purchasers and manufacturers from using other supplemental loading and shipping practices by mutual agreement. The stress limits given in 3. They must be considered as supplementary to the existing rules of governing agencies.
These areas are normally traversed by sea-going vessels. Occasionally, existing pipelines constructed at a time prior to the observance of the recommended loading practice still experience failures at defects that originated as shipping damage and subsequently enlarged in service.
If the top tier is a partial load, separator strips shall be used to secure additional blocking, which is used to secure the top tier of pipe. Figure 3 is a chart for the calculation of stresses for commonly obtained ,[0. The rules of governing regulatory agencies shall be considered as basic, with the recommendations given herein as supplementary 5llw. When the pipe is loaded by loose lifts, all necessary precautions shall be taken during loading and unloading to prevent surface or other damage to the pipe.
I1 The value of 0. End damage to pipe can occur during loading and unloading, or from a longitudinal load shift against a bulkhead or an adjacent pipe. These recommendations are not applicable to pipe-laying vessels or supply vessels.
API Rp 5lw Linepipe Marine Transport
Key Results This project determined that a recommended practice should be developed for line pipe loading on trucks for transport because the potential for fatigue-related damage is present due to:. 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.
An exception is that the recommendations of Section 3 as concerned with load stresses are exclusively applicable to API line pipe having diameter-tothickness Dlt ratios of 50 and more. Any values not shown on the lines may be calculated from the formula in 3. Key Ep This project determined that a recommended practice should be developed for line pipe loading on trucks for transport because the potential for fatigue-related damage is present due to: Line pipe shipments on inland and marine waterways should be designed to 5lww that the pipe will arrive at the destination undamaged.
API Rp 5lw Linepipe Marine Transport
For inland 5l transit, pipe may be cantline stowed, or separator strips may be 5la between successive tiers of pipe. No part of this work m y be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher: For apk waterway shipments, horizontal separator strips may be used when the pipe is not nested.
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 this 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.
This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated 5le an API standard. As an alternative to flat strips, bearing strips contoured to contact the pipe for a minimum included angle of 30 degrees may be used. Such damage, called transitfatigue, has been reported in pipe with diameter-to-thickness ratios as low as This publication will no longer be in effect five years after its publication date as an operative API standard or, where an extension has been granted, upon republication.
Sometimes a one-time extension of up to two years will be added to this review cycle. ai
With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed.