لوله (Pipe) چیست ؟
پایپ یا لوله، یک مقطع فولادی توخالی با سطح مقطع کاملاً دایرهای است که در طول 6 و 12 متر و سایزهای متنوع تولید میشود. کاربرد لولهها در انتقال سیالات نظیر آب، نفت و گاز از محل این منابع به پالایشگاهها و یا محلهای مسکونی است. ازآنجاییکه لوله برای انتقال مایعات یا گاز استفاده میشود، اندازه دهانهای که سیالات یا گاز میتوانند از آن عبور کنند احتمالاً برای شما مهمتر از ابعاد بیرونی است. ازاینرو، انواع لولهها بر اساس قطر درونی آنها و نیز مقدار Schedule سایزبندی میشوند. اصلیترین تفاوت لوله و تیوب نیز همین نحوه تعیین سایز آنهاست.
Seamless (SMLS) pipe is formed by drawing a solid billet over a piercing rod to
create the hollow shell. As the manufacturing process does not include any welding,
seamless pipes are perceived to be stronger and more reliable. Historically seamless
pipe was regarded as withstanding pressure better than other types.
There is also another type of pipes. Welded pipes that contain 2sub groups: Electric
Resistance Welded (ERW). Electric Fusion Welded (EFW) this kind of pipe is formed
by rolling plate and welding the seam.
But in Large-diameter pipes seamless and ERW pipes are not available.There are two
technologies that can be used to manufacture steel pipes of sizes larger than the steel
pipes that can be produced by seamless and ERW processes. The two types of pipes
produced through these technologies are Longitudinal submerged arc welded
(LSAW) and Spiral submerged arc welded (SSAW) pipes. LSAW are made by bending
and welding wide steel plates. SSAW pipes are produced by spiral (helicoidal)
welding of steel coil.
Type: SEAMLESS, ERW, EFW, LSAW, SSAW, SPIRAL
Size: 1/4″ to 56″ (13.7mm to 1422mm)
Thickness: Sch 5 to XXS (1.65mm to 60mm)
Material: ASTM A106 (GR.A, GR.B, GR.C) Carbon Steel
API 5L (GR.B, X42, X46, X52, X56, X60, X65, X70, X80, X90, X100) Carbon Steel
ASTM A312 (ТР304304/L,TP310, TP316316/L,TP321, TP347) Stainless Steel ASTM
A333 (GR.1, GR.3, GR.4. GR.6, GR.7, GR.8, GR.9, GR.10, GR.11) Low Temp ASTM
A335 (GR.P1, GR.P2, GR.P5, GR.P9, GR.P11, GR.P22, GR.P91) High Temp
INCOLOY (800, 801, 805, 810) Alloy Steel SANDVIK In Different Types of PSL1 & PSL2 & NACЕ
Copper Nickel, Aluminium, Monnel 400, Brass, etc