Abstract: A pipe coupling structure, configured to prevent formation of a gap between the inner peripheral surfaces of pipe elements connected together through which gap a fluid being transported may enter, includes first and second pipe elements to be connected together. The first pipe element has a first sealing portion with an acute angle defined by a first inner peripheral surface defining a hole of the first pipe element and a first annular surface extending radially outward from an end edge of the first inner peripheral surface. The second pipe element has a second sealing portion defined by a second inner peripheral surface defining a hole of the second pipe element and a second annular surface extending radially outward from an end edge of the second inner peripheral surface. The first and second pipe elements are connected together, with the first and second end edges abutted against each other.

Abstract: A pipe coupling structure, configured to prevent formation of a gap between the inner peripheral surfaces of pipe elements connected together through which gap a fluid being transported may enter, includes first and second pipe elements to be connected together. The first pipe element has a first sealing portion with an acute angle defined by a first inner peripheral surface defining a hole of the first pipe element and a first annular surface extending radially outward from an end edge of the first inner peripheral surface. The second pipe element has a second sealing portion defined by a second inner peripheral surface defining a hole of the second pipe element and a second annular surface extending radially outward from an end edge of the second inner peripheral surface. The first and second pipe elements are connected together, with the first and second end edges abutted against each other.