A flange for a pump comprising: a first face ; a second face ; a passageway for cryogenic fluid flow extending from said first face to said second face; a first pipe ; and one of: said passageway for said first pipe comprising a first portion of a first diameter and a second portion of a second diameter greater than said first diameter, a first annular groove in one of said first face and said second face and extending around said first and second portions of said passageway, a first annular portion between said first annular groove and said passageway; and a first annular groove in one of said first face and said second face and extending around said passageway, a first annular portion between said first annular groove and said passageway, a second annular groove extending from an opposite face as said first annular groove and around said first annular groove, a second annular portion between said second annular groove and first annular groove; wherein said first pipe is connected with said first annular portion such that when said first annular portion contracts along the axial direction of the passageway and flex due to a thermal gradient between said first pipe and said flange along said first annular portion said first pipe moves with said first annular portion . a first face ; a second face ; a passageway for cryogenic fluid flow extending from said first face to said second face; a first pipe ; and one of: said passageway for said first pipe comprising a first portion of a first diameter and a second portion of a second diameter greater than said first diameter, a first annular groove in one of said first face and said second face and extending around said first and second portions of said passageway, a first annular portion between said first annular groove and said passageway; and a first annular groove in one of said first face and said second face and extending around said passageway, a first annular portion between said first annular groove and said passageway, a second annular groove extending from an opposite face as said first annular groove and around said first annular groove, a second annular portion between said second annular groove and first annular groove; said passageway for said first pipe comprising a first portion of a first diameter and a second portion of a second diameter greater than said first diameter, a first annular groove in one of said first face and said second face and extending around said first and second portions of said passageway, a first annular portion between said first annular groove and said passageway; and a first annular groove in one of said first face and said second face and extending around said passageway, a first annular portion between said first annular groove and said passageway, a second annular groove extending from an opposite face as said first annular groove and around said first annular groove, a second annular portion between said second annular groove and first annular groove; wherein said first pipe is connected with said first annular portion such that when said first annular portion contracts along the axial direction of the passageway and flex due to a thermal gradient between said first pipe and said flange along said first annular portion said first pipe moves with said first annular portion . <EOS>