Carbon Steel Pipe – Octalsteel

Steel Pipe Pile, Pipe Piling, Piling Pipe – Foundation Material

Amanda — Mon, 10 Sep 2018 17:02:16 +0000

A steel pipe pile is a type of steel piling material that is commonly used to support and stabilize the foundation of a building. It is typically made of carbon steel and can be manufactured in seamless or welded forms, such as SSAW or LSAW. Therefore, a pipe pile serves as a structural construction material.

Pipe pile applications

Steel pipe piles are highly recommended as the preferred piling material for seaport constructions and yard buildings. They have been widely used in sea works or marine works to establish robust foundations. Additionally, they are commonly employed in various other applications, including under buildings, bridges, and structural constructions. Further details are outlined below:

Onshore and offshore constructions
Marine foundations / constructions
Tower building
Railway, highway construction
Dock yard construction
Sea works, marine works
Oil and gas filed foundations
Structural support in special buildings
etc.

Where Pipe Pile Schedules Slip—（How Octal Steel fix Them）

• Sea works / marine works — splash zone coating turns into a schedule dispute
Marine delays rarely come from “wrong coating selection.” They come from small handling/guide abrasions that show up in the splash zone, then turn into a stop-and-argue item because the site has no shared boundary for what counts as a defect and what repair is acceptable. We remove that argument surface before shipment by delivering coating acceptance as a practical closure loop: holiday test records tied to pile locations, zoned DFT readings (including a defined splash-zone band), and a coating-specific repair playbook (surface prep requirement, approved patch materials, overlap, cure/handling window, and re-inspection steps such as re-holiday testing where applicable). When damage happens, the crew repairs and keeps driving instead of waiting for approvals.

• Dock yard construction — refusal zones expose vague end strategy
Dock/yard piling hits mixed strata (dense sand, gravel, cobbles, hard interlayers). If end strategy is vague, the site pays with toe damage, abnormal driving curves, cutting/rework, and re-verification while everyone debates open-ended vs closed-ended vs shoe/rock shoe after piles arrive. We prevent that by locking end configuration as a procurement boundary: open/closed end definition, accessory boundary (shoe/rock shoe/reinforcement ring if specified), and consistent end finishing (end squareness, toe geometry consistency) so drivability doesn’t vary pile to pile. We also treat route-to-wall alignment as a drivability control for thicker walls, where inconsistency becomes expensive fast.

• Railway / highway construction — “minor” geometry drift breaks rhythm
Linear work is rhythm-driven. Small straightness/ovality drift doesn’t fail the job on paper, but it quietly kills pace: binding in leaders, tilt correction, wasted hammer energy, and harder fit-up on segmented deliveries. We lock down the geometry that controls production speed—not just OD×t×L. That means stable straightness and ovality behavior for long piles, end coaxiality and end squareness for a predictable driving line, plus segmented delivery alignment marking and consistent end prep so crews aren’t burning time “making pieces fit.”

• Onshore & offshore constructions — splicing becomes the critical path when fit-up isn’t stable
When piles require multiple segments, schedule risk often shifts from driving to welding/inspection. Most “welding delays” are actually fit-up instability: bevel inconsistency, non-square ends, and ovality accumulation push root gap/mismatch out of control, and thicker walls amplify distortion and UT rework. We prevent that by holding bevel geometry consistency across the lot, keeping end squareness/roundness stable for repeatable fit-up, and making the weld/NDT boundary explicit (pipe seam per governing standard; field splice NDT scope defined as a project item rather than a vague “UT as required”). With traceability in place, the site can isolate issues quickly instead of stopping the line to argue causes.

About steel pile

Steel pile includes:
Pipe Pile – Piling Pipe – Pipe Piling
Sheet Pile
H-beam pile
Screw pile
Disc pile

All these materials are made of iron steel and worked for piling under the buildings.

How does steel pile pipe work

Steel piles are utilized in situations where the soil beneath a building is loosely packed, and there are concerns about the long-term stability of the structure. By using a pipe pile, the weight is evenly distributed and extends deeper into the Earth, where the soil is more compact. This proves to be highly advantageous in the construction of super-large buildings, where the soil alone cannot provide the necessary support.

On the other hand, in situations where the land area is small and does not give enough room for spread footers or foundations, the forcing buildings will be used so that there is a better level of stability on the ground.

Common forms of pipe piling

The most commonly used forms of pile pipes are typically large in diameter, ranging from 16 inches to 60 inches. These heavy-duty steel pipes can be manufactured using seamless, longitudinal welded (LSAW), or spiral welded (SSAW) techniques. Depending on the soil environments, the pipes may be coated with zinc (galvanized), FBE, or 3LPE coatings. This helps to provide moisture resistance and corrosion resistance, enhancing their durability.

Pipe Pile in LSAW welded types

Pipe Piling manufactured in SSAW/HSAW spiral welded

Piling Pipe 3LPE coated

Open-ended pipes are typically used when there is a specific requirement for support. However, in other cases, these pipes can be capped with steel plates or rock shoes to create closed-ended pilings. Installers can then fill these closed-ended pilings with concrete and reinforced steel to enhance the stability and strength of the foundation. This approach is commonly employed to increase the overall durability and resilience of the structure.

Pipe pile installation

In order to install a pipe pile, a pile driver is required. Pile drivers are machines that are capable of driving the piles deep into the ground using hydraulic systems that can exert high levels of force. When steel piles are driven directly into the soil, without the need for drilling a hole, the soil itself provides the necessary support for stabilizing the pipe. As the pipe is driven into the ground, the soil is displaced, creating increased friction and pressure from all sides, which helps to firmly hold the pipe in place.

Methods to place the piling pipe

Depending upon the load of the building at different locations, engineers and installers shall decide the placement of the pipe. When there is a very heavy load, typically in the case of industrial equipment, the pile pipe must be placed directly under it, so that it offers enough support.

If the load distribution of the building is even, there might be a concrete pile cap that is used for supporting the building, which allows the piling pipe for equal placement and serves as a single assembly connector for the entire foundation.

Choosing the right steel pile pipe for piling

The pipe piling must be chosen carefully depending on the forces of the building, the prevailing conditions of the soil and building codes of that area. The placement of piles is determined by a geotechnical engineer. The structural engineer then decides on the piling material, and size of the pipe piling according to the depth which they must reach. In cases where a single piling pipe does not reach the required depth, piles are joined using splicing sleeves or butt welds to make them longer.

Open end and close end pipe piling

Based on the different soil environments and requirements, Pipe piling could be divided into open-end pile and close-end pile pipe.

Open-end pile pipe (Unplugged pipe pile)

The driving end of this type of pipe pile is left open, which means there is no driving point. It is usually used to go through the rock or the tough area. When the open end of piling pipe sinks in underground, we can remove the soil through water jet or compress the air. Meanwhile, as the pile pipe drives to a certain depth, they will be fully cleaned and filled with concrete.

Close-end pile pipe (Plugged pipe pile)

The driving end of this type of pipe pile is left closed. By welding a conical profile steel or cast-iron steel to the pipe end, we can close the pipe piling end. After driving works, the internal of the pipe is filled with concrete.

For closed-end piles, the driving end of each piling pipe is closed by welding a bottom steel (conical steel or cast-iron rock shoe) to the pipe end. Also, after driving, the hollow space inside the pipe is normally filled with concrete.

Both open-ended and close-ended pipe piles can be driven into the ground. When using close-ended piles with plates, concrete is utilized to enhance the pile’s strength. However, instead of investing in plates, rebar, and concrete, it may be more cost-effective to allocate the same resources towards a thicker and larger pile. Pipe piles typically range in length from a few inches to a few feet in diameter, providing flexibility in creating piles of various sizes as needed.

Pipe piling size

Normally, piling pipe OD ranges from 250 mm (10 inch) to 1500 mm (60 inch), thickness from 8 mm to 25 mm.

Referred standard specification of pipe pile

The most widely used standard for pipe pile is ASTM A252. Grades in three levels, Gr 1, Gr 2, and Gr 3.

Chemical Composition of ASTM A252: The steel only defines no more than 0.050 % phosphorous.

Elongations:

ASTM A252

This specification is generally for wall steel pipes that are cylindrical in shape. The steel cylinder acts like a load-carrying member for the cast-in-place piles of concrete.

Types of Manufacturing for pipe piling

Pipe piling is generally manufactured using seamless, resistance welding, fusion welding, flash welding with seams being longitudinal, helical. It also specifies the tensile requirements, minimum values and the common size and weight based on the values.

Advantages of steel pipe pile

One of the major advantages of steel pipe piles is their ability to provide robust support for underground foundations. This is particularly important when a structure needs to bear a heavy load, as it necessitates a deep and strong foundation. Therefore, having the appropriate structural support, such as steel pipe piles, is crucial for ensuring the stability and strength of deep foundations.

Although there are various options for structural support available, steel pile pipes are highly recommended due to their versatility and customization capabilities. Steel pile pipes can be tailored to meet specific requirements, making them an ideal choice. Additionally, the cost associated with using steel pile pipes is relatively minimal compared to other alternatives.

Less cost

When purchasing pipe piles, there is no need for additional expenses on structural support as the construction and erection process is relatively simple and less complex. Furthermore, pipe piles can be tested before they are used, ensuring their quality and reliability. Moreover, pipe piles are easy to add after the initial construction phase, making them a convenient choice. In terms of maintenance and replacement costs, pipe piles are considered to be the most cost-effective option, making them an efficient choice for structural support.

Free of cracking

Steel pipe piles are resistant to cracking during the driving process and can effectively support heavy loads. They are also easy to handle and install, making them user-friendly. When properly installed, steel pipe piles have minimal overall costs and provide a high level of safety.

Octal Supplies Pipe Pile

Reach out to us and we will offer you the best solutions, products, implementations, design and workforce to ensure that your deep foundation is strong and safe.

As one of the pipe pile suppliers focused on acceptance-ready delivery, Octal Steel supports pipe pile sizes and pipe piles sizes across common foundation ranges, with supply boundaries defined around the items that decide field progress: pipe pile weight for lifting/logistics planning, pipe pile dimensions and tolerances for smooth driving and fit-up, and steel pipe pile properties aligned with the governing standard and project inspection scope. Whether your scope is marine, dock, or infrastructure piling, we supply the documentation and controls that help keep installation moving and acceptance clear—so your deep foundation work stays predictable from shipment to driving.

FAQ

Q1: How is pipe pile weight calculated, and why can shipping weight differ from table values?
A1: Pipe pile weight is commonly calculated by W(kg/m) = 0.02466 × (OD − t) × t (OD and t in mm). Shipping weight can differ due to length tolerances, OD/t tolerances, coating build (FBE/3LPE/paint), and end accessories such as shoes or closure plates.

Q2: What is the plugging effect in an open-ended pipe pile, and how does it change drivability?
A2: Plugging happens when soil enters an open-ended pipe pile and begins behaving like a “plug,” shifting resistance mobilization. The driving response can change sharply (penetration rate, blow count trend, toe behavior), which is why open-ended vs closed-ended strategy often becomes a schedule-sensitive decision in dense or layered ground.

Q3: Beyond OD × wall × length, which pipe pile dimensions most affect splice fit-up and UT outcomes?
A3: Straightness, ovality, end squareness, and bevel consistency usually control whether splicing becomes smooth or turns into repeated rework. When these geometry items drift, root gap/misalignment becomes unstable, distortion increases on thicker walls, and UT rejection rates tend to rise.

Q4: For marine pipe piles, what coating checks typically reduce acceptance disputes in the splash zone?
A4: The most dispute-prone items are dry film thickness (DFT) verification, holiday detection results, and a repair log that ties defects to exact pile locations. A clear “repair trigger + repair method + re-inspection step” for the splash-zone band helps avoid现场临时解释与反复等待, especially after handling/guide abrasion.

ASTM A106 Grade B Pipe Specification

Amanda — Sun, 10 Dec 2017 13:35:55 +0000

ASTM A106/ASME SA106 is the standard specification for seamless carbon steel pipe used for high-temperature services. It includes three grades: A, B, and C, with Grade B being commonly used. This type of pipe finds applications in various industries, including pipeline systems for oil and gas, water, and mineral slurry transmission. It is also used in boiler systems and for construction and structural purposes.

ASTM A106 Grade B pipe is considered equivalent to ASTM A53 Grade B and API 5L Grade B in terms of chemical composition and mechanical properties. It is a type of carbon steel that has a minimum yield strength of 240 MPa and a minimum tensile strength of 415 MPa.

Below, we will explain ASTM A106 Grade B pipe from different aspects:

Chemical composition
Mechanical Strength
Dimensions
Material specification
Standards referred for making A106 pipes
Grade types
A Specific order description

ASTM A106 Standard Specification

ASTM A106 standard specification in PDF.

Chemical composition and Mechanical Strength

ASTM A106 Grade B and A pipe chemical composition

Chemical composition in %

Carbon (C) Max For Grade A 0.25, For Grade B 0.30, Grade C 0.35
Manganese (Mn): 0.27-0.93, 0.29-1.06
Sulfur (S) Max: ≤ 0.035
Phosphorus (P) : ≤ 0.035
Silicon (Si) Min : ≥0.10
Chrome (Cr): ≤ 0.40
Copper (Cu): ≤ 0.40
Molybdenum (Mo): ≤ 0.15
Nickel (Ni): ≤ 0.40
Vanadium (V): ≤ 0.08

Please note:
For every reduction of 0.01% in the maximum carbon element, an increase of 0.06% in manganese above the specified value is allowed, up to a maximum of 1.35%.

Elements Cr, Cu, Mo, Ni, V combined shall not exceed 1%.

ASTM A106 Grade B Tensile Strength and Yield Strength

Elongation formula:
In 2 in. [50mm], shall be calculated by: e = 625 000 A^0.2 / U^0.9
For inch-pound Units, e = 1940 A^0.2 / U^0.9

Explanations of e, A, and U, please find here. (Equation same with ASTM A53, API 5L pipe.)

Tensile Strength, min, psi [MPa] Grade A 48,000 [330], Grade B 60,000 [415], Grade C 70,000 [485]
Yield Strength minimum at psi [MPa] Grade A 30,000 [205], B 35,000 [240], C 40,000 [275]

Elongation in 2 in (50mm), minimum percentage % ,
For all small sizes tested in full section, basic minimum elongation transverse trip tests: Grade A Longitudinal 35, Transverse 25; B 30, 16.5; C 30, 16.5;
In case standard round 2 inch gage length test sample is used, above values are: Grade A 28, 20; B 22, 12; C 20, 12.

ASTM A106 Grade B Pipe Dimensions Schedule

The standard covers pipe sizes in NPS (National Standard Straight) from 1/8 inch to 48 inches (10.3mm DN6 – 1219mm DN1200). It also complies with the nominal wall thickness specified in ASME B 36.10M. For sizes that are not covered by ASME B 36.10M, this standard specification can still be used.

Raw materials

The materials used for the ASTM A106 standard specification should be suitable for bending, flanging, or similar forming processes. If the steel material is to be welded, the welding process should be appropriate for this grade of ASTM A106 and suitable for high-temperature working environments.

In cases where a superior or higher grade of ASTM A106 steel pipe is required, the standard provides an optional specification for supplementary requirements. Additionally, these supplementary specifications require additional testing to be conducted when placing an order for pipes that adhere to this standard.

Standards referred for making ASTM A106 pipes

References ASTM standards:

a. ASTM A530/ A530M: This is the standard specification for the common requirements of carbon and alloy pipes.
b. E213: The standard for the Ultrasonic Examination test.
c. E309: The standard for the Eddy Current examination test.
d. E381: The standard for the plan of Macroetch test, for steel products such as steel bars, steel billets, blooms, and forging steels.
e. E570: The standard for the test plan for the flux leakage test of ferromagnetic steel pipes and pipeline products.
f. Related ASME Standard:
g. ASME B 36.10M: The standard specification for nominal sizes of welded and seamless steel pipes.
h. Related Military standard:
i. MIL-STD-129: The standard for the markings of shipment and storage.
j. MIL-STD-163: The standard for the storage and shipment of steel forging products.
k. Related federal standard:
l. Fed. Std. No. 123: The standard for the marking and shipments for civil agencies.
m. Fed. Std. No. 183: The standard specification for continuous ID marking for steel products.
n. Surface standard:
o. SSPC-SP 6: The standard specification for surface preparation.

Grade B Seamless Pipe

The ASTM A106 standard specifications for seamless steel pipes consist of three grades: ASTM A106 Gr. A, Gr. B, and Gr. C. With higher-grade materials, the strength performance is improved.

Test Methods

The test methods for ASTM A106 grades A, B, and C include flattening tests, hydrostatic tests, nondestructive electric tests, ultrasonic tests, eddy current tests, and flux leakage tests. These test procedures should be communicated and confirmed with the client to determine which specific tests will be applied.

Our Supply Range for Sale

Octal supplys ASTM A106 Grade A, Grade B, and Grade C seamless carbon steel pipes under the following conditions:

Standard: ASTM A106, Nace, Sour service.
Grade: A, B, C
Range of OD outer diameter: NPS 1/8 inch to NPS 20 inch, 10.13mm to 1219mm
Range of WT wall thickness: SCH 10, SCH 20, SCH STD, SCH 40, SCH 80, to SCH160, SCHXX; 1.24mm up to 1 inch, 25.4mm
Range of length: 20ft to 40ft, 5.8m to 13m, single random lengths of 16 to 22ft, 4.8 to 6.7m, double random length with average 35ft 10.7m
Ends procession: Plain end, beveled, threaded
Coating: Black paint, varnished, epoxy coating, polyethylene coating, FBE and 3PE, CRA Clad and Lined.

Boiler Pipe Material Specification and Application

Amanda — Sun, 03 Sep 2017 10:43:11 +0000

Boiler steel pipe refers to specialized seamless steel tubes designed for use in high-temperature and high-pressure environments, particularly within power generation and petrochemical facilities. According to manufacturing practice, boiler pipes are divided into medium-pressure boiler pipes and high-pressure boiler pipes, both of which are almost exclusively produced using seamless processes due to the stringent requirements for strength, reliability, and resistance to failure. Welded steel pipes are generally not applicable for such critical services, as seam integrity can be a limiting factor under cyclic thermal stress.

These pipes serve as essential components in heat exchanger tubing, tube bundles, economizers, superheaters, and high-pressure boilers, where stable mechanical properties and resistance to oxidation at elevated temperatures are indispensable. Their design and production must strictly conform to standards such as ASTM, ASME, DIN, and EN specifications to ensure performance in demanding operating conditions. By combining metallurgical quality, dimensional accuracy, and pressure tolerance, boiler steel pipes play a pivotal role in the safety and efficiency of thermal and chemical process industries.

It has been widely used at heat exchanger pipe and tubing services, tube exchanger bundle, high pressure boiler, economizer, super heater, petrochemical industry pipes, etc.

Boiler pipe materials and standards

Standards and material for steel pipe is available at carbon, alloy, and stainless steel material.
Carbon steel: ASTM/ASME A/SA 106, ASTM A179, ASTM A192, ASTM/ASME A/SA 210, ASTM A333 Gr 1, 6,7 to Gr 9,
Alloy steel: ASTM/ASME A/SA 213 T1, T2, T5, T9, T11, T12, T22, T91, T92; ASTM A335 P1, P2, P5, P9, P11, P12, P22, P91, P92
Stainless Steel: ASTM A268, ASTM A213, TP304/L, TP316/L, 310S,309S,317,317L,321,321H, and duplex stainless steel material etc.
Common Sizes: OD from 6mm to 1240mm, thickness from 1mm to 50mm
Types: Straight boiler pipe, and U boiler steel pipe for tube exchanger bundle.
These standards specify the classification, size, shape, weight and allowable deviation, technical requirements, inspection and test, packaging, marking and quality certificate of seamless steel tubes for boiler.

Boiler Pipe Size

Boiler pipe size range complied with the different ASTM standard required. Like ASTM A106 or ASTM 179, 192 etc.

But most of the boiler pipe size is small, outer diameter usually less than 1 1/2” (1/4”, 1/2”, 3/4”, 1” and 1 1/2”). Then 2”, 2 1/2”, 3” and maximum to 4”.

Medium and high pressure boiler pipe differences

Based on different working temperature, the medium or high pressure boiler pipe shall be used. Normally classified as below cases:
a. The operation temperature of general boiler pipe is lower than 450℃. The medium pressure boiler pipeline mainly adopts hot rolling process or cold drawing process.
b. High pressure boiler pipes are often used in high temperature and high pressure conditions. Under the action of high temperature flue gas and steam, the pipe will occur oxidation and corrosion. It is required high pressure boiler pipe that has high durable strength, high oxidation corrosion resistance and good tissue stability.

Boiler Pipe Manufacturing methods

The manufacturing method of medium and high pressure boiler steel pipe is same with the seamless steel pipe, but there are some key manufacturing processes shall be noted:
Fine drawing, surface bright, hot rolling, cold drawn, heat expansion

Heat treatment methods applied in the boiler pipes

Heat treatment is a method of changing the physical properties of high pressure boiler pipe by heating and cooling. Heat treatment can improve the microstructure of high pressure boiler pipe, so as to meet the required physical requirements. Toughness, hardness and wear resistance are obtained by heat treatment. In order to obtain these characteristics, it is necessary to adopt quenching, annealing, tempering and surface hardening.

a. Quenching

Hardening, also called quenching, is that high pressure boiler pipe is heated evenly to the appropriate temperature, then quickly immerse in water or oil for rapid cooling, and cooling in the air or in the freezing zone. So that the high pressure boiler pipe can obtain the required hardness.

b. Tempering

High pressure boiler pipe will become brittle after hardening. And the stress caused by quenching can make the high pressure boiler pipe tapped and broken. The tempering method can be used to eliminate brittleness. Although the hardness of high pressure boiler pipe is lighter reduced, its the toughness can be increased to reduce the brittleness.

c. Annealing

Annealing is the method to eliminate the internal stress of high pressure boiler pipe. The annealing method is that the steel parts need to be heated to the critical temperature, then put in dry ash, lime, asbestos or closed in the furnace, then let it cooling slowly.

The basic method of rust removal

a. Cleaning

Using the solvent and emulsion to clean the surface of high pressure boiler pipe, so as to achieve the purpose of removing oil, grease, dust, lubricant and similar organic matter. But it cannot remove the dust, oxide skin, welding medicine and so on. So it is only as a supplementary method in the anti-corrosion production.

b. Tool

Tool rust removal mainly use wire brush and other tools to grind the surface of high pressure boiler pipe. It can remove loose or warping of the oxide skin, rust, welding slag and so on. Manual tool can reach SA2 level, power tool can reach SA3 level. If the iron oxide scale attached to the surface, it cannot reach the anchorage depth required by the anti-corrosion construction.

c. Acid cleaning

High pressure boiler pipe generally adopt chemical and electrolytic methods to do pickling treatment.

d. Spray rust removal

Spray rust removal cannot only remove rust, oxide and dirt completely, but also high pressure boiler pipe can achieve the required uniform roughness under the action of abrasive impact and friction force.

Spay rust removal cannot only expand the physical adsorption on the surface of high pressure boiler pipe, but also enhance the mechanical adhesion between the anti corrosion layer and the pipe surface. So spray rust removal is ideal method of rust removing for pipeline corrosion.

In Summary

The reliability of a boiler system depends heavily on the quality of its tubing. By delivering consistent performance under extreme pressure and temperature fluctuations, boiler steel pipes ensure the stable operation of power plants, refineries, and industrial heat exchangers. Their ability to resist creep, oxidation, and thermal fatigue makes them indispensable for facilities that cannot afford downtime or structural failure.

As a global supplier, Octal Steel provides certified medium-pressure and high-pressure boiler steel pipes manufactured in strict accordance with ASTM, ASME, and EN standards. Each pipe undergoes rigorous quality inspections and is supplied with complete documentation, including mill test certificates (MTC) and traceability reports. For clients across the energy and petrochemical sectors, Octal Steel delivers not only high-quality boiler tubing but also long-term reliability and technical assurance essential for critical operations.