Exhibit  5.1



                           Fulbright & Jaworski L.L.P.
                            1301 McKinney, Suite 5100
                                Houston, TX 77010
                              Phone: (713) 651-5151
                               Fax: (713) 651-5246



March 19, 2003

Kaneb Pipe Line Partners, L.P.
2435 N. Central Expressway Suite 700
Richardson, TX 75080-2731

Ladies and Gentlemen:

     We have  acted as counsel to Kaneb  Pipe Line  Partners,  L.P.,  a Delaware
limited  partnership  (the  "Partnership"),  in  connection  with  the  proposed
offering  by the  Partnership  of up to  3,450,000  units  representing  limited
partner interests in the Partnership (the "Units"),  including an over-allotment
option to purchase 450,000 units. We refer to the registration statement on Form
S-3  (Registration  No.  333-98621)  filed  with  the  Securities  and  Exchange
Commission  (the  "Commission")  by  the  Partnership  on  August  23,  2002  as
supplemented  by  the  Prospectus   Supplement  dated  March  18,  2003  (as  so
supplemented, the "Registration Statement").

     As counsel to the  Partnership,  we have examined such  corporate  records,
documents and questions of law as we have deemed  necessary or  appropriate  for
the  purposes  of this  opinion.  In such  examinations,  we  have  assumed  the
genuineness  of signatures  and the conformity to the originals of the documents
supplied  to us as copies.  As to various  questions  of fact  material  to this
opinion,  we have relied  upon  statements  and  certificates  of  officers  and
representatives  of the  Partnership.  Without  limiting the foregoing,  we have
examined  the  Underwriting  Agreement,   dated  March  18,  2003,  between  the
Partnership,  Kaneb Pipe Line Company  LLC,  Salomon  Smith  Barney  Inc.,  A.G.
Edwards & Sons, Inc., and McDonald  Investments Inc. as  representatives  of the
several underwriters (the "Underwriting Agreement").

     Based upon the foregoing,  and having regard for such legal  considerations
as we deem  relevant,  we are of the  opinion  that the  Units  have  been  duly
authorized  by the  Partnership  for  issuance,  and the  Partnership  has  full
corporate  power and  authority to issue,  sell and deliver the Units and,  when
issued and delivered to and paid for by the  Underwriters in accordance with the
terms of the  Underwriting  Agreement,  will be validly  issued,  fully paid and
nonassessable.

     The opinions  expressed herein are limited  exclusively to the federal laws
of the United  States of  America,  the laws of the State of Texas,  the Revised
Uniform  Limited  Partnership  Act of the State of Delaware  and the  applicable
provisions of the Delaware  constitution and reported decisions  concerning such
laws, and we are expressing no opinion as to the effect of the laws of any other
jurisdiction.

     We hereby  consent  to the  filing of this  opinion  as an  Exhibit  to the
Registration  Statement and to the statements  made with respect to us under the
caption  "Legal" in the  Prospectus  and  "Validity of Units" in the  Prospectus
Supplement included as a part of the Registration Statement.


                                      Very truly yours,

                                      /s/Fulbright & Jaworski L.L.P.

                                      Fulbright & Jaworski L.L.P.