Say seamless tube et napili ed dakel a trabaho ed pressure tan machinery lapud say laman na tubo et anggapoy andukey ya weld seam to. Say padir et ginawa manlapud malimpek a billet, kanian say materyales et onliber ed interon sirkulo. Aglabay ya ibaga na saya ya amin ya anggapoy tahi ya tubo et nayarin usaren ed antokaman ya pressure line. Say grado, kapal na dingding, estandarte, paraan na panagsukimat, tan kondisyon na tapew et kaukolan nin siansia ya mipara ed drowing.
Diad kimey na makinarya, say tubo ya anggapoy tahi to et mabetbet ya putoten, iboboring, ibalikas, odino i-weld ed sananey a parte, kanian say inkapeteg tan say pakatebek ed diametro ed paway et mas importante nen say iisipen na totoo. Parad kimey na pluido, importante met so sampot na tubo. Say beveled end, plain end, odino threaded end so manguman ed no panon ya ipuesto so tubo. No mankokompara iray managsaliw na presyo, ag da labat nepeg ya ikompara so diametro tan presyo. Nepeg da met ya nengnengen no kasin say tubo et hot rolled odino cold drawn, no kasin kaiba so inspeksyon, tan no kasin say karukey to et fixed odino random.
