1:Ipayipi yeBoiler(ASTM A335 P5,P9,P11,P22,P91, P92 njl) Inkcazelo esemgangathweni yePipe yeFerritic Alloy-Steel engenamthungo yeNkonzo yoBushushu obuPhezulu 2:Ipayipi yoMgca(API 5L Gr.B X42 X52 X60 X65 X70 njl) Ipayipi engenamthungo esetyenziselwa ukuthutha ioyile, umphunga kunye ne-wat esemgangathweni ophezulu...
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