Longitudinal Steel Pipe

Steel pipe longitudinal cracks

Steel pipe longitudinal cracks Steel pipe weld defects affect the quality of the most immediate cause, and the welding crack is one of weld defects. Longitudinal cracks manifestations are: crack fracture, with a smooth arc free surface, sometimes oxides, electron probe found no other inclusions.

longitudinal pipe - CANGZHOU STEEL PIPE GROUP

Steel pipe weld welding,Welding is a professional, highly normative work in the steel construction is very important, therefore, as a key in the bridge steel arch ribs processing monitor the entire process..

Longitudinal Seam Pipe Factory, Custom Longitudinal Seam ...

Looking for longitudinal seam pipe factory direct sale? You can buy factory price longitudinal seam pipe from a great list of reliable China longitudinal seam pipe manufacturers, suppliers, traders or plants verified by a third-party inspector. Source with confidence.

What Are Differences Between Spiral Welded Pipe and ...

Spiral welded steel pipe and longitudinal welded pipe have differences in shapes, patterns, sizes and using applications. Many aspects should be told to you if you want to know more.

Longitudinal Steel Pip - CANGZHOU STEEL PIPE GROUP

Product Name. LSAW Pipe/longitudinal submerge-arc welded pipes/longitudinally welded saw pipes/Gas and oil longitudinally steel pipe. Size. OD: 406.4mm to 1422.4mm

LONGITUDINAL SAW PIPES - mukatpipes

longitudinal saw pipes High quality plates are procured from well –known local manufactures like Steel Authority of India, Essar Steel , Tata Steel, or are imported from leading steel mills abroad.

Longitudinal Submerged Arc Welded Pipes - UMRAN

Longitudinally welded steel pipes are used in onshore and offshore oil and gas pipelines requiring critical service, high performance and tight tolerances. LSAW pipe are also used in conveyance of flammable & nonflammable liquids, and as structural members in construction projects.

Longitudinal joint factor (E) for steel pipe.

§ 192.113 Section § 192.113 Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PIPELINE SAFETY TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS Pipe Design § 192.113 Longitudinal joint factor (E) for steel pipe.

49 CFR 192.113 - Longitudinal joint factor (E) for steel pipe.

Pipe 4 inches (102 millimeters) or less .60 If the type of longitudinal joint cannot be determined, the joint factor to be used must not exceed that designated for “Other.”

Longitudinal stress in a pipe - Pipelines, Piping and ...

eng-tips› Forums› Mechanical Engineers› ActivitiesDec 14, 2004· Longitudinal stress does not exist "no matter how long the pipe". It depends on the pipe conditions. For example, water pipe is typically laid in 20' sections with push-on gasketed joints between sections.Not sure what you're getting at. At any capped end or valve, you'll develop longitudinal stresses unless the cap or valve is independently supported. When you put hoop stresses in a cylinder, the cylinder gets shorter from Poisson's effect. If the pipe is restrained, this will give longitudinal stresses about 1/3 of the hoop stress. At an unblocked ell or tee, you'll develop longitudinal stress in a pipe due fluid flowing.As I recall from strength of materials , remember the "law of the hot dog",ie , the hot dog always cracks in the longitudinal direction because the circumferential stress is equal to twice the longitudinal stress. for circumeferncial stress, a free body diagram of a cylinder of length L, diameter D, wall thickness t and internal pressure P has the following stress relationship: P*D*L=2*S,c*t*L, or S,c= PD/(2t) For the same cylinder, the longitudinal stress is found by a similar free body diagram: P*pi*D^2/4= pi*D*t*S,l, or S,l=P*D/(4t) so the circumferntial stress is twice the longitudinal stressThe longitudinal stress in a pressure vessel is simply the reaction of the bulkhead to pressure. In the absence of such end caps, your situation for an infinitely long pipeline, I can see your point. For pipeline computations, I have often simply dropped the longitudinal stress stated in Thick Walled Pressure Vessels, then applied Von Mises-Hencky. Of course this is in the absence of themal fluxuations which may cause stresses due to restraining. Also, JStephen correctly points out the implication of Poisson's Ratio. Wow, "Law of the Hot Dog"! I never quite thought of the phenonema as such, probably won't forget about it now! "Law of the Hot Dog", sounds more like Mr Smarty-Pants in hockey getting his just beets. Kenneth J Hueston, PEng Principal Sturni-Hueston Engineering Inc Edmonton, Alberta CanadaWow, a Principal PEng dropping longitudinal stress! Of course longitudinal stress exists no matter how long the pipe. Pressure goes in all directions.codeeng- From a Stress Intensity (Tresca) perspective, the longitudinal stress exists, but is irrelevant. Stress intensity is defined as "the difference between the algebraically largest principal stress and the algebraicaly smallest principal stress at a given point." [VIII-2 4-112(a)] So if you take your principal stresses from highest to lowest as P1, P2, and P3 then stress intensity is P1-P3. If you agree that the circ stress (P1) is the highest tensile stress, and longitudinal is half that (P2) (and tensile), and that the radial stress is close to zero (except for thick wall cylinders) then the stress intensity = circ stress - radial stress. The longitudinal stress plays no role, though it does exist. The von Mises criteria offers a similar approach to Tresca, and if you play with some numbers, you'll find that the longitudinal stress has little impact on the von Mises stress also. jtLongitudinal stress does not exist "no matter how long the pipe". It depends on the pipe conditions. For example, water pipe is typically laid in 20' sections with push-on gasketed joints between sections. In that case, there should be very little longitudinal stress. The ends are restrained by thrust blocking or by friction against the soil, not by stress in the pipe. Also, as far as I know, in most cases, the allowable stress will be based on the maximum hoop stress or longitudinal stress as established by some code, not by theories of failure.Longitudinal stress exists and is relevant when considering loads other than pressure. e.g. combined stresses between pipe supports/vessel saddles; combined stresses on a column due to wind/seismic; nozzle loads; etc. For example,if you had a very large longitudinal moment on a nozzle, longitudinal stress could govern when adding the combined effect of pressure plus external loads.Longitudinal stress is also important when using the new high temperature creep resistant ferritic materials. These new alloys have strong parent matieral , but the weld heat affected zone of a butt weld has only 60% of the strength of the parent material. So, even if the butt weld is exposed to only 50% of the circumferential stress, it can become overstressed if one adds longitudinal gravity loads, bendign momnets, shear stresses, and other pipeline stresses.longitudinal stress in pipe under internal pressure ...Jan 28, 2014Longitudinal stressFeb 07, 2012See more results

Helical Welded Pipes and Longitudinal Welded Pipes

Helical Welded Pipes and Longitudinal Welded Pipes. Welded line pipes enjoy a wide acceptance in oil and gas transporting market for its selection variety and relatively low cost. According to the different welding seams, welded line pipes can be further categorized into two types, the helical welded pipes and longitudinal welded pipes.

Longitudinal Steel Pip - CANGZHOU STEEL PIPE GROUP

Product Name. LSAW Pipe/longitudinal submerge-arc welded pipes/longitudinally welded saw pipes/Gas and oil longitudinally steel pipe. Size. OD: 406.4mm to 1422.4mm

49 CFR 192.113 - Longitudinal joint factor (E) for steel pipe.

Pipe 4 inches (102 millimeters) or less .60 If the type of longitudinal joint cannot be determined, the joint factor to be used must not exceed that designated for “Other.”

Welded Carbon Steel Pipe - Hunan Prime Steel Pipe Co., Ltd

Leading manufacturer and exporter for carbon steel pipe, welded steel pipe, erw steel pipe, lsaw steel pipe, ssaw steel pipe etc.

Best ERW Welded Steel Pipe and Tubes, Spiral Welded Steel ...

TORICH is a professional manufacturer and exporter of Welded Steel Pipe, including: . ERW WELDED STEEL PIPE, ERW WEDLED STEEL TUBE. LASW WELDED STEEL PIPE, LASW Welded Steel Tube, with the production method of longitudinal welded arc welding.. ERW Welded Steel Pipe is produced by electric resistance welding method, from raw material of hot rolled or cold rolled steel plate, steel …

Longitudinal Steel Pipe manufacturers ... - made-in-china

If you are about to import Longitudinal Steel Pipe, you can compare the Longitudinal Steel Pipe factories and manufacturers with reasonable price listed above. More related options such as steel pipe, steel tube, pipe could be your choices too.

Longitudinal stress in a pipe - Pipelines, Piping and ...

eng-tips› Forums› Mechanical Engineers› ActivitiesDec 14, 2004· Longitudinal stress does not exist "no matter how long the pipe". It depends on the pipe conditions. For example, water pipe is typically laid in 20' sections with push-on gasketed joints between sections.

Carbon Steel Pipe | Omega Steel

Seamless carbon steel pipe has, as its name implies, no longitudinal weld seam. It is, in essence, one solid homogeneous piece of steel. A solid billet is simply heated and then stretched over a series of mandrels until the pipe has achieved its desired diameter and wall thickness.

China Longitudinal welded steel pipes Manufacturers

China Longitudinal welded steel pipes with High-Quality, Leading Longitudinal welded steel pipes Manufacturers & Suppliers, find Longitudinal welded steel pipes Factory & Exporters.

Longitudinal Seam Pipes, Longitudinal Seam Pipes ... - …

Alibaba offers 1,233 longitudinal seam pipes products. About 29% of these are steel pipes, 1% are stainless steel pipes. A wide variety of longitudinal seam pipes options are …

Difference between Seamless & ERW Stainless Steel pipe

pearlitesteel› Stainless Steel BlogPearlites steel is one of the leading ERW Stainless Steel Pipes Manufacturer and exporter from India. Contact us for product details. Common sizes for ERW Steel Pipe range from 2 3/8 inch OD to 24 inch OD in a variety of lengths to over 100 feet.

Longitudinal Steel Pipe_CHN Steel pipe & tube Co.,Ltd

Longitudinal Steel Pipe,Application:for oil pipe, casing, line pipe in petroleum and natural gas, structural pipe, line pipe in mineral slurry andbittern, water and gas; and also being used for chemical industry, electric power engineeri

China Ssaw longitudinal steel pipes Manufacturers

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Longitudinal Weld Pipe, Longitudinal Weld Pipe Suppliers ...

Alibaba offers 6,829 longitudinal weld pipe products. About 77% of these are steel pipes, 5% are stainless steel pipes, and 1% are pipe fittings. A wide variety of longitudinal weld pipe options are available to you, such as q195, 10#.

What is longitudinal, circumferential and radial stress in ...

Longitudinal stress is the stress in a pipe wall, acting along the longitudinal axis of the pipe. And it is produced by the pressure of the fluid in the pipe. Circumstantial stress is the stress in a pipe wall, acting circumstantially in a plane perpendicular to the longitudinal axis of the pipe.

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