API 5L GR.BʻO ka paipu kila seamless kahi mea pipeline i hoʻohana nui ʻia i ka ʻoihana aila a me ke kinoea, e kūlike ana me kaAPI 5Lkūlana o ka American Petroleum Institute. ʻO nā papa mea maʻamau ma lalo o kēia kūlana e komo pū me ka pae PSL1GR.A, GR.B, GR.X42 a i GR.X52, a me ka pae PSL2 GR.X56 a i GR.X80. Hōʻike nā helu i ka ikaika hua liʻiliʻi loa, i ana ʻia ma ksi. He kila kalapona-manganese ikaika waena ʻo GR.B me nā waiwai mechanical maikaʻi loa a me ka hiki ke hoʻopili ʻia.
ʻO ka hoʻohuihui kemika maʻamau o GR.B e komo pū ana me ka ʻike kalapona ʻaʻole i ʻoi aku ma mua o 0.28%, ka ʻike manganese ʻaʻole i ʻoi aku ma mua o 1.20%, a me ka kaohi paʻa ʻana i nā haumia e like me ka phosphorus a me ka sulfur. ʻAʻole emi kona ikaika tensile ma mua o 414 MPa, ʻaʻole emi kona ikaika yield ma mua o 241 MPa, a ʻaʻole emi kona elongation ma mua o 21%. Hiki iā ia ke hoʻokō i nā koi o ka halihali waena a me ke kaomi kiʻekiʻe. ʻO ke kaʻina hana o nā paipu kila seamless e hoʻolilo iā lākou i ka hiki ke lawe i ke kaomi kiʻekiʻe a me ke ʻano like, kūpono no nā wahi kaomi kiʻekiʻe. Eia kekahi, hiki i ka mea GR.B ke hoʻololi i nā wahi mahana haʻahaʻa ma o nā hoʻāʻo hopena hou aʻe a hoʻonui i ke kūpaʻa ʻana i ka corrosion ma o nā uhi anti-corrosion.
Hoʻohana nui ʻia nā paipu kila humuhumu API 5L GR.B no ka halihali ʻaila a me ke kinoea, me nā paipu ʻāina a me ke kai, nā lako poʻo luawai, a me nā paipu ʻeli. Eia kekahi, hoʻohana ʻia lākou i ka ʻoihana kemika no ka halihali ʻana i nā mea ʻino, i ka ikehu a me ka mana no nā paipu paila kiʻekiʻe, ma nā pūnaewele lako kinoea a me ka wai o ke kūlanakauhale, a me nā kahua e kū mai ana e like me ka ikehu hydrogen a me ka hopu kalapona. Ke hoʻohālikelike ʻia me ke kila kalapona maʻamau, ʻoi aku ka ikaika o GR.B a me ke kūpaʻa ʻana i ke kaomi, a ke hoʻohālikelike ʻia me ke kila kila, ʻoi aku ka maikaʻi o ke kumukūʻai a kūpono hoʻi no nā papahana paipu nui.
I ke koho ʻana i nā paipu kila API 5L GR.B, pono e noʻonoʻo ʻia nā mea e like me ka hoʻohālikelike waena, ka mahana hana a me nā koi anti-corrosion. No nā wahi kūikawā e like me nā kūlana waikawa a haʻahaʻa paha, pono e hoʻohana ʻia nā mea PSL2 kiʻekiʻe a i ʻole nā ​​​​hoʻāʻo hou aʻe. ʻO kēia mea, me kāna hana kaulike a me nā ʻano noi like ʻole, ua lilo ia i koho kūpono no ka halihali paipu kiʻekiʻe mamao.