Pombi yeERW nepombi yeLSAW dzose mapaipi akasungirirwa akatwasuka, ayo anonyanya kushandiswa kutakura mvura, kunyanya mapaipi emafuta negesi ari kure. Musiyano mukuru pakati pezviviri izvi maitiro ekubatanidza. Maitiro akasiyana anoita kuti pombi ive nehunhu hwakasiyana uye yakakodzera kushandiswa kwakasiyana.

Chubhu yeERW inoshandisa welding ine resistance resistance high-frequency uye inoshandisa hot-rolled broadband steel coils sezvinhu zvisina kugadzirwa. Seimwe yemapombi anonyanya kushandiswa nhasi, nekuda kwekushandiswa kwema rolled steel strips/coils ane saizi yakafanana uye chaiyo sezvinhu zvisina kugadzirwa, ine zvakanakira zve high dimension accuracy, ukuru hwemadziro hwakafanana, uye kunaka kwepamusoro. Pombi ine zvakanakira short weld seam uye high pressure, asi maitiro aya anogona kungoita mapombi madiki nepakati nepakati ane dhayamita yakatetepa (zvichienderana nehukuru hwesimbi strip kana simbi inoshandiswa sezvinhu zvisina kugadzirwa). Weld seam inowanzo kuve nemavanga matema, asina kusanganiswa, uye corrosion defects. Nzvimbo dziri kushandiswa zvakanyanya parizvino kutakura gasi remaguta nemafuta asina kugadzirwa.

Pombi yeLSAW inoshandisa nzira yekuwedera arc yakanyudzwa, iyo inoshandisa ndiro imwe chete ine gobvu repakati sechigadzirwa chisina kugadzirwa, uye inoita welding yemukati nekunze panzvimbo yekuwedera uye inowedzera dhayamita. Nekuda kwemhando dzakasiyana dzezvigadzirwa zvakapedzwa zvinoshandisa mapurati esimbi sezvinhu zvisina kugadzirwa, ma weld ane kusimba kwakanaka, plasticity, kufanana uye kupfupika, uye ane mabhenefiti edhayamita yepombi hombe, ukobvu hwemadziro epombi, kuramba kumanikidzwa kwakanyanya, kuramba kupisa kwakaderera uye kuramba ngura. Pakugadzira mapaipi emafuta negesi ane simba rakakwirira, kusimba kwakanyanya, emhando yepamusoro, mapaipi mazhinji esimbi anodiwa mapaipi akanyudzwa arc akanyudzwa ane dhayamita hombe. Zvichienderana neAPI standard, mumapaipi makuru emafuta negesi, kana achipfuura munzvimbo dzeClass 1 neClass 2 dzakadai senzvimbo dzeAlpine, seabeds, nenzvimbo dzemaguta dzine vanhu vakawanda, mapaipi akanyudzwa arc akanyudzwa akatwasuka ndiwo ega mhando yemapaipi akasarudzwa.