It seems that my first part of the word “Pipe” is disappeared??

I use these packages

    usepackage{array}
    usepackage{multirow}
    usepackage{rotating}


    begin{document}

    begin{table}[h!]
    centering
    begin{tabular}{||>{centering}m{1cm}| |>{centeringarraybackslash}m{1cm}|>       

    {centeringarraybackslash}m{1cm}|>{centeringarraybackslash}m{1cm}|>  

     {centeringarraybackslash}m{5cm}||} 
        rowcolor{gray!20}
        hline
        Item & Outer enspace diameter& Material & Standard & Description \
        
        hlinehline
    rowcolor{white}
    parbox[c][=0mm][r]{2mm}{multirow{2}{*}{ begin{turn}{90} Pipe
    end{turn}}}&tekst1&&&\&tekst2&&&\
                 hline
        1 & 6 & 87837 & 787 \ 
        2 & 7 & 78 & 5415 \
        3 & 545 & 778 & 7507 \
        4 & 545 & 18744 & 7560 \
        5 & 88 & 788 & 6344 \ [1ex] 
        hline
    end{tabular}

    end{table}
    end{document}

I tried to rotate the word pipe in the table, but it somhow partly disappeared ???
How can I solve this