WELDED Steel Pipe Piles （ERW ,LASW, DSAW ,SSAW.）
The two most common methods for steel pipe welding are straight seam or spiral seam welding. Welded steel pipes are typically used to transport fluid (water or oil) and natural gas. It is typically less expensive than seamless steel pipe. Both types of welding are applied after the pipe has been rolled, which involves shaping a sheet of steel into the end shape.
Straight Seam: Straight seam welded steel pipes are manufactured by adding a welding parallel to the pipe seam. The process is fairly straightforward: Straight seam pipes are formed when a sheet of steel is bent and formed into a pipe shape, then welded longitudinally. Straight seam pipes can be submerged arc welded (SAW) or double-submerged arc welded (DSAW).
Spiral Seam: Spiral seam welded pipes are manufactured when hot-rolled strip steel is formed into a pipe through spiral bending and welded along the then spiraled seam of the pipe. This results in the weld length being 30-100% longer than that of a straight seam welded pipe. This method is more commonly used on large diameter pipe. (Note: this method of welding may also be referred to as helical submerged arc welded, or HSAW. Spiral seam pipes are also available as DSAW.)
There are three grades under the A252 Pipe Pile Specification, and they are as follows:
Specifications
As per the specification, the weight of the pipe cannot vary by 15% over or 5% under the theoretical weight. Moreover, the outside diameter cannot vary more than + or – 1% of the OD or 12.5% under the nominal wall thickness.
The length ranges under this spec are as follows:
- Single Random Lengths: 16 to 25 ft
- Double Random Lengths: Over 25 ft with min, average of 35 feet
A252 pipe can either have plain ends, done by either flame-cuts or machine-end cuts. When bevels are required, they are to be beveled at an angle of 30 +5 degrees.
For more information, please review the ASTM guidelines.
A252 Pipe Pile Popular Grade Sizes Tube & Metal
We have sizes available up to 120”. Contact us for details.
Chemical composition and mechanical properties of ASTM A252 Pipe Pile
The standard has a limit for element P (phosphorous) maximum 0.050%, since P will make steel fragile, and most important is not good for welding performances. ASTM A252 standard specifications only defines the conten of phosphorous, other elements accord with general carbon steel material.
Mechanical Properties of A252 Pipe Pile
Enlongations
ASTM A252/A252M-19 Standard Specification for Welded and Seamless Steel Pipe Piles
Abstract
This specification covers nominal wall cylindrical steel pipe piles in which the steel cylinder acts as a permanent load-carrying member or as a shell to form cast-in-place concrete piles. Each welded pile shall be made by seamless, electric resistance welding, flash welding or fusion welding with longitudinal, helical-butt, or helical-lap seams. This specification also deals with material tensile requirements, minimum elongation values and common size and weights per unit length values.
Scope
1.1 This specification covers nominal (average) wall steel pipe piles of cylindrical shape and applies to pipe piles in which the steel cylinder acts as a permanent load-carrying member, or as a shell to form cast-in-place concrete piles. Pipe piles are produced as both welded and seamless products.
1.2 This specification is expressed in both inch-pound units and SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from two systems may result in nonconformance with the standard.
1.3 The text of this specification contains notes and footnotes that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements.
1.4 The following precautionary caveat pertains only to the test method portion, Section 16 of this specification. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ERW (Electric Resistance Welded) pipe piling is a type of steel pipe that is commonly used in construction and foundation applications, such as in the building of bridges, wharves, and other structures. ERW pipe piling is created by using a process in which a flat steel strip is rolled into a tube shape, and then the edges are heated and welded together using an electric current. ERW pipe piling has a number of advantages over other types of piling, including: Cost-effective: ERW pipe piling is generally less expensive than other types of piling, such as seamless pipe piling. High strength: ERW pipe piling is highly resistant to bending, making it a strong and durable option for foundation applications. Customizable: ERW pipe piling can be manufactured to meet specific size and length requirements, making it highly customizable and adaptable to different project needs.ERW Pipe Piling is available in a range of sizes and thicknesses, and can be produced in lengths of up to 100 feet or more. It is typically made from carbon steel or alloy steel, and can be coated with a layer of protective material to help prevent corrosion and extend the lifespan of the pipe. Versatile: ERW pipe Read more
Spiral weld pipe pile, otherwise known as SSAW Pipe pile, is a type of pipe piling product used in the construction of deep foundations. It is made from steel that has been formed into a spiral shape and welded together. It is used in a variety of applications, including bridge foundations, retaining walls, deep foundations for buildings, dams, and other large structures. Spiral weld pipe pile is a high-strength, low-alloy steel pipe made from a combination of rolled steel plates and helically wound steel strips. It is highly resistant to corrosion and has a high strength-to-weight ratio, making it an ideal choice for deep foundations and other high-load applications. The process of creating spiral weld pipe pile begins with hot-rolling a steel plate into a coil. This coil is then fed into a machine which shapes it into a spiral shape. This spiral is then cut into sections and welded together to form a single pipe pile. After the welding is complete, the pipe pile is then heat treated and tested to ensure it meets the desired specifications. Spiral weld pipe pile is a strong and reliable choice for any deep foundation or other high-load application. It is resistant to Read more
Introduction Steel pipe piles have been used for many years as a foundation element in various construction projects. They are commonly used in the construction of bridges, buildings, and other structures that require a strong and stable foundation. The use of steel pipe piles has evolved over the years, with new technologies and techniques being developed to improve their performance and durability. One of the most significant advancements in the use of steel pipe piles is the transition from traditional steel pipe piles to spiral steel welded pipe piles. This paper will explore the technical transition of steel pipe piles to spiral steel welded pipe piles, including the benefits and challenges associated with this transition. PDF Downloads：Tubular Pile, pipe piles, steel piles, tubular pipes Background Steel pipe piles are typically made from steel plates that are rolled into cylindrical shapes and welded together. They are commonly used in deep foundation applications where the soil conditions are poor or where the structure being built is heavy. Steel pipe piles are typically driven into the ground using a pile driver, which forces the pile into the soil until it reaches a predetermined depth. Once the pile is in place, it provides Read more
Standard Specification for Welded and Seamless Steel Pipe Piles1 This standard is issued under the fixed designation A 252; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This specification covers nominal (average) wall steel pipe piles of cylindrical shape and applies to pipe piles in which the steel cylinder acts as a permanent load-carrying member, or as a shell to form cast-in-place concrete piles. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions of the values in inch-pound units to values in SI units. 1.3 The text of this specification contains notes and footnotes that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements. 1.4 The following precautionary caveat pertains only to the test method portion, Section 16 of this specification. This standard does not purport to address all of the safety problems, if any, associated Read more
Steel pipe piles and steel pipe sheet piles have found extensive applications in various construction projects, including ports/harbors, urban civil engineering, bridges, and more. These versatile piles are used in the construction of piers, seawalls, breakwaters, earth-retaining walls, cofferdams, and foundations for steel pipe sheet pile foundations. With the increasing size of structures, deeper water depths, and construction work on sites with deep soft ground, the usage of steel pipe piles and steel pipe sheet piles has expanded significantly.
In conclusion, SAWH steel piles and SSAW steel pipe piles are essential components in the construction industry, providing strong and reliable foundation systems. Their unique characteristics, manufacturing processes, and advantages make them suitable for a wide range of applications. Whether it's supporting buildings, bridges, or offshore structures, these piles offer the strength, durability, and versatility required for successful construction projects.
