What is the difference between a welded steel pipe and a welded spiral steel pipe

Date: 2024-05-29

What is the difference between a welded steel pipe and a welded spiral steel pipe Welded steel pipe refers to a steel pipe with seams on the surface that is formed by bending steel strips or steel plates into round, square, and other shapes and then welding them. The billet used for welded steel pipes is steel plate or strip steel. Since the 1930s, with the rapid development of high-quality strip steel continuous rolling production and the advancement of welding and inspection technology, the quality of welds has been continuously improved, the variety and specifications of welded steel pipes have increased, and they have replaced seamless steel pipes in more and more fields. Welded steel pipes have lower costs and higher production efficiency than seamless steel pipes. Steel pipes are divided into seamless and welded pipes. Welded pipes are divided into straight seam steel pipes and spiral steel pipes. Straight seam welded pipes are divided into ERW steel pipe (high-frequency resistance welding) and LSAW steel pipe (straight seam submerged arc welding). The welding process of spiral pipes is also the difference between submerged arc welding (SSAW steel pipe for short) and LSAW steel pipe in the form of welds, and the difference with ERW is the difference in the welding process. Submerged arc welding (SAW steel pipe) requires the addition of medium (welding wire, flux), but ERW does not require it. ERW is melted by medium-frequency heating. Steel pipes can be divided into two categories according to the production method: seamless steel pipes and welded steel pipes. Seamless steel pipes can be divided into hot-rolled seamless pipes, cold-drawn pipes, precision steel pipes, hot-expanded pipes, cold-spun pipes, and extruded pipes according to the production method. Seamless steel pipes are made of high-quality carbon steel or alloy steel and are divided into hot-rolled and cold-rolled (drawn). The production process of straight seam welded pipes is simple, with high production efficiency, low cost, and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. Narrower billets can be used to produce welded pipes with larger diameters, and billets of the same width can also be used to produce welded pipes with different diameters. However, compared with straight seam pipes of the same length, the weld length increases by 30~100%, and the production speed is lower. Therefore, smaller-diameter welded pipes are mostly welded by straight seam welding, while large diameter welded pipes are mostly welded by spiral welding. Post time: May-29-2024

Prev : API 5CT CASING STOCK FOR SALE
Next : Problems in the regulations and selection standards for thick-walled steel pipes in engineering
Tags : steel tube provider , coated carbon steel pipe , 316 stainless steel pipe

News

Latest news list

How to Choose Stainless Seamless Steel Pipe for High-Temperature Applications

High-temperature piping requires more than simply selecting a stainless steel grade,As temperature increases,material strength,corrosion behavior,thermal expansion,pressure resistance,and long-term stability become increasingly important,For this reason,stainless seamless steel pipe should be selected against the complete service condition rather than temperature alone,
How Stainless Seamless Steel Pipe Is Manufactured: From Billet to Finished Pipe

Stainless seamless steel pipe is used in chemical processing,oil and gas,power generation,water treatment,food processing,and other applications where material performance and pressure integrity matter,But a finished pipe does not become reliable simply because it is made from stainless steel,Its quality is built through material control,forming,heat treatment,dimensional control,inspection,and traceability,Understanding how stainless seamless steel pipe is manufactured gives engineers and technical buyers a better way to evaluate suppliers beyond price,surface appearance,or a product catalogue,
LSAW Steel Pipe Maintenance: Extend Pipeline Service Life

Installing a properly specified LSAW steel pipe does not eliminate the need for pipeline maintenance,Once a pipeline enters service,corrosion,coating deterioration,mechanical loading,ground movement,operating changes,and environmental exposure can gradually affect its condition,For large-diameter pipelines,a practical maintenance program should focus on identifying changes early and taking corrective action before a manageable condition develops into an integrity problem,The objective is not simply to inspect the pipe,It is to understand the condition of the complete pipeline system and respond based on evidence,
How LSAW Steel Pipe Performs in High-Pressure Pipeline Systems

High-pressure pipeline systems place demanding requirements on pipe material,dimensions,weld integrity,inspection,and operating conditions,For large-diameter pipelines,LSAW steel pipe can be an effective solution because its manufacturing process allows large outside diameters and substantial wall thicknesses to be produced from steel plate,However,selecting LSAW steel pipe for pressure service is not simply a matter of choosing a thicker wall,The pipe specification needs to match the actual design pressure,temperature,fluid,diameter,applicable code,and service environment,
How to Prevent LSAW Steel Pipe Corrosion in Water and Buried Pipeline Systems

LSAW steel pipe is widely used for large-diameter water transmission,buried pipelines,and other infrastructure projects where strength,dimensional control,and long-term service reliability are important,However,pipe strength alone does not prevent corrosion,For buried or water pipeline systems,corrosion protection should be considered from material selection and coating through transportation,field welding,installation,and long-term inspection,A coating system should also be selected according to the actual operating environment rather than simply by initial cost,