Hot Expanded Seamless Pipes

Forever Steel Manufacturing Co., Ltd
hot expanded seamless pipe,hot expansion SMLS pipe,large diameter seamless pipe,tubería sin costura expandida en caliente,ASTM A106 hot expanded,API 5L X52 X60 SMLS

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  • Coated steel pipe transportation,3LPE pipe protection,FBE coating safety,steel pipe logistics Middle East,hemp rope pipe buffering
    Specialized Protection Protocols for Coated Steel Pipe Logistics Overview At **Forever Steel**,we understand that a steel pipe is only as good as its surface condition upon arrival,For projects in **South America** and the **Middle East**,our focus is on preventing "Holiday" (coating gaps) and mechanical gouges during the complex multi-modal transport process,Multi-Layered Material Protection We utilize a combination of traditional and modern soft-protection materials to ensure the safety of 3LPE,FBE,and 3LPP coatings: * **Hemp Rope Spiraling**: Thick hemp ropes are coiled around the pipe body to maintain a fixed safety distance between pipes,eliminating friction during sea-transit,* **Straw Mat Interlining**: Heavy-duty straw mats are placed on all timber dunnage to absorb shocks and prevent pressure-point marks on the coating,* **Non-Woven Fabric Shielding**: For sensitive FBE coatings,we offer full-body wrapping in high-density non-woven fabric to protect against dust,UV rays,and micro-abrasions,Compliance & Quality Assurance All our handling and loading procedures follow **API 5L** transportation guidelines and **ISO 21809** standards,We use only nylon webbing slings and padded hooks—**zero metal-to-metal contact** is guaranteed throughout the loading process,Why Choose Forever Steel? Our commitment to detail reduces your project’s "On-Site Repair" costs,We provide a complete **Loading & Bracing Plan** with every shipment,ensuring that your procurement team has full transparency over the safety of your assets,
  • External Coatings,Cathodic Protection,Corrosion Inhibitors,Environmental Management,Monitoring and Maintenance
    Based on the extreme environmental conditions of the Middle East—specifically high ambient temperatures,significant diurnal (day-night) temperature swings,and highly saline or corrosive desert soils—preventing corrosion requires a more robust technical approach than standard environments,Here is the strategy for preventing corrosion in underground oil pipelines specifically tailored for the Middle East: 1,Advanced Coating: 3LPP vs,3LPE In the Middle East,surface temperatures can exceed 50°C,and the oil inside the pipe is often transported at high temperatures,3-Layer Polypropylene (3LPP): While 3LPE is standard globally,3LPP is the preferred choice for Middle Eastern projects (such as those by Saudi Aramco or ADNOC),Polypropylene has a much higher softening point than polyethylene,allowing it to withstand operating temperatures up to 110°C and providing better resistance to the abrasive desert sand,High-Glass Transition FBE: The primer layer (Fusion Bonded Epoxy) must have a high $T_g$ (Glass Transition Temperature) to ensure the coating does not become brittle or lose adhesion during extreme thermal cycling,2,Enhanced Cathodic Protection (CP) High temperatures accelerate the electrochemical corrosion rate (following the Arrhenius Law),For every 10°C increase in temperature,the corrosion rate can nearly double,Impressed Current Cathodic Protection (ICCP): Due to the long distances and high soil resistivity in dry deserts,ICCP is mandatory,Deep Well Anode Beds: To reach stable soil moisture and avoid the high-resistance surface layers dried out by the sun,anodes are typically buried in deep vertical wells,Automatic Rectifiers: Systems must use smart rectifiers that automatically adjust current output to compensate for changes in soil moisture and temperature between day and night,3,Managing Thermal Expansion and Stress The massive temperature delta between the scorching day and cooler night causes the steel to expand and contract significantly,Anti-Abrasion Overcoating: As the pipe moves slightly due to thermal expansion,it rubs against the soil,An additional "Rough Coat" or concrete weighting is often used to prevent the primary anti-corrosion coating from being "sanded" away,Selection of Backfill: Using screened,fine-grained sand for backfilling is critical,This prevents "point loading," where sharp rocks could be pushed through the coating as the pipe expands and contracts,4,Internal Corrosion & MIC Control Even in arid deserts,moisture can condense inside the pipeline or exist in the crude oil,Sulfate-Reducing Bacteria (SRB): These bacteria thrive in the warm underground temperatures of the Middle East,leading to Microbiologically Influenced Corrosion (MIC),Inhibitor Injection: Constant injection of corrosion inhibitors and regular Pigging (using cleaning scrapers) are required to remove water pockets and biofilms from the internal floor of the pipe,5,Remote Digital Monitoring Given the vast and inhospitable nature of Middle Eastern oil fields,manual inspection is difficult,Remote Monitoring Units (RMU): These units use satellite or GSM to transmit CP data (pipe-to-soil potential) to a central office,ensuring the protection is active 24,7 without needing field crews in the heat,Fiber Optic Sensing: Many modern lines bury fiber optic cables alongside the pipe to detect leaks and mechanical stress caused by soil movement or thermal shifts,
  • Bitumen coated pipe,Austenitic stainless steel,Production tubing
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  • Electric resistance welded,3LPP coated pipe,Polyethylene coated pipe
    Natural gas is a highly flammable and explosive energy source,and its safe transportation is a matter of great importance,Among all transportation methods,long-distance pipelines are considered the safest,fastest,and most cost-effective solution,However,during the operation of these pipelines
  • Structural hollow section,Precision seamless pipe,Drill pipe
    In modern construction and residential water supply systems,PE coated pipe has become one of the most reliable and widely used materials,Known for its corrosion resistance,durability,and flexibility,it provides a practical solution for both hot and cold water pipelines,Below,we explore the operating conditions,installation considerations,and technical performance of PE coated pipes in building applications,

Hot Expanded Seamless Pipes

Hot Expanded Smls Pipes
Large diameter hot expanded seamless steel pipe API 5L for oil gas line
Induction heating hot expansion seamless pipe with thick wall thickness
Hot expanded SMLS pipe stack with black coating and beveled ends
Tubería sin costura expandida en caliente de gran diámetro para proyectos

Product Category: Hot Expanded Pipe, Large Diameter Seamless Pipe, Hot Expanding Steel Pipe, Heavy Wall Seamless Pipe, Carbon Steel Hot Expanded Pipe, Customized SMLS Pipe.

Outer Diameter (OD): 219mm – 914.4mm (8" to 36")

Wall Thickness (WT): 6mm – 60mm

Length: 5.8mtr – 12mtr (Fixed or random lengths)

Process Advantage: Provides a cost-effective solution for large-diameter pipes that cannot be directly produced by standard hot rolling.

Technical Standards & Grades:

Line Pipe Standard: API 5L (Grades B, X42, X46, X52, X56, X60, X65 PSL1/PSL2)

Structural Standard: ASTM A53 (Grade B), ASTM A106 (Grade B, C), EN 10210 (S235JR, S355JR, S355J2H)

Boiler & Pressure: ASTM A192, ASTM A210, EN 10216-1

End Finish:Beveled Ends/Plain Ends/Victaulic Grooved Ends

Surface Treatment:

Anti-Corrosion: Black Painting/Varnish, Anti-rust oil

Coating: 3PE, FBE (Fusion Bonded Epoxy), Liquid Epoxy Coating, Galvanized (Hot Dipped)

Packing:In loose pieces (for large diameters)Nylon slings or thick ropes provided for easy loading/unloadingSteel bands for smaller diameter bundles /End protectors/Plastic caps to prevent contamination

  • Description
  • Specification
  • Standard
  • Process
  • Packing

Hot Expanded Seamless Steel Pipe–Large Diameter & High-Efficiency Solutions

Our Hot Expanded Seamless Steel Pipes provide a cost-effective alternative for projects requiring large-diameter piping without the high cost of traditional large-billet seamless manufacturing. By utilizing a specialized thermal-mechanical expansion process, we transform standard seamless mother pipes into larger diameters while maintaining structural integrity and meeting strict international engineering standards.


Common Standards and Steel Grades

We supply hot expanded pipes across a wide range of carbon and alloy grades to ensure compatibility with your project's specific pressure and temperature requirements:

ASTM A106 / ASME SA106: Grades B and C for high-temperature service.

ASTM A53: Grades A and B for general mechanical and pressure applications.

API 5L: Pipeline steel for oil and gas (Grades B, X42, X46, X52, X56, X60).

ASTM A335: Alloy steel grades for high-temp power generation (P11, P22, P91).

EN 10210 / EN 10219: Hot finished structural hollow sections (S235JR, S355JR).


Dimensional Range & Specifications

The hot expansion process is the ideal choice for large-bore piping where standard seamless production is limited:

Feature

Specification Range

Outer Diameter (OD)

10” to 48” (273.1mm – 1219mm)

Wall Thickness (WT)

SCH 20, SCH 40, SCH 80, SCH STD (up to 40mm)

Length

Single Random (5.8m), Double Random (11.8m), or Custom Cut

Tolerance

Strictly per ASTM A530 or API 5L (OD ±1%, WT ±12.5%)

End Finish

Beveled Ends (30°±5°), Plain Ends, or Special Threading


Core Application Fields

Hot expanded pipes are widely utilized in heavy-duty infrastructure and energy sectors where large-volume fluid transport is required:

Oil & Gas Midstream: Large-diameter transmission pipelines for crude oil and natural gas.

Structural Engineering: Bridge piling, offshore platform legs, and stadium frameworks.

Water Conservancy: Main water supply lines and high-pressure drainage systems.

Thermal Power Plants: Low-pressure steam lines and cooling water circulation.

Petrochemical Industry: Large-scale refinery piping and storage tank connections.

Technical Parameters of Hot Expanded Seamless Steel Pipe

Nominal size Outside Nominal Wall Thickness (mm)
Diameter
DN NPS OD(MM) SCH SCH SCH STD SCH SCH XS SCH SCH SCH SCH SCH XXS
10 20 30 40 60 80 100 120 140 160

200

250

300

8

10

12

219.1

273.1

323.9

3.76

4.19

4.57

6.35

6.35

6.35

7.04 

7.80

8.38

8.18 9.27 9.53

8.18

9.27 10.31

10.31 12.70 14.27 12.70 12.70 12.70 12.70 15.09 17.48 15.09 18.26 21.44 18.26 21.44 25.40 20.62 25.40 28.58 23.01 28.58 33.32 22.23 25.40 25.40

350

400

450

14

16

18

355.6

406.4

457.2

6.35

6.35

6.35

7.92

7.92

7.92

9.53

9.53 11.13

9.53 9.53 9.53 11.13 12.70 14.27 15.09 16.66 19.05 12.70 12.70 12.70 19.05 21.44 23.83 23.83 26.19 29.36 27.79 30.96 34.93 31.75 36.53 39.67 35.71 40.49 45.24 — —

500

550

600

20

22

24

508

559

610

6.35

6.35

6.35

9.53

9.53

9.53

12.70 12.70 14.27 9.53 9.53 9.53

15.09

17.48

20.62 22.23 24.61 12.70 12.70 12.70 26.19 28.58 30.96 32.54 34.93 38.89 38.10 41.28 46.02 44.45 47.63 52.37 50.01 53.98 59.54 — —

500

550

600

20

22

24

508

559

610

6.35

6.35

6.35

9.53

9.53

9.53

12.70 12.70 14.27 9.53 9.53 9.53

15.09

— 

17.48

20.62 22.23 24.61 12.70 12.70 12.70 26.19 28.58 30.96 32.54 34.93 38.89 38.10 41.28 46.02 44.45 47.63 52.37 50.01 53.98 59.54 — —

660

700

750

26

28

30

660

711

762

7.92

7.92

7.92

12.70 12.70 12.70

15.88 15.88

9.53 9.53 9.53

— — 12.70 12.70 12.70 — — — — — — — — — — — —

800

850

900

32

34

36

813

864

914

7.92

7.92 7.92

12.70 12.70 12.70 15.88 15.88 15.88 9.53 9.53 9.53 17.48 17.48 19.05 — — 12.70 12.70 12.70 — — — — — — — — — — — —

Hot Expanded Seamless Pipe Production Process

Technical Parameters of Hot Expanded Seamless Steel Pipe

Nominal size Outside Nominal Wall Thickness (mm)
Diameter
DN NPS OD(MM) SCH SCH SCH STD SCH SCH XS SCH SCH SCH SCH SCH XXS
10 20 30 40 60 80 100 120 140 160

200

250

300

8

10

12

219.1

273.1

323.9

3.76

4.19

4.57

6.35

6.35

6.35

7.04 

7.80

8.38

8.18 9.27 9.53

8.18

9.27 10.31

10.31 12.70 14.27 12.70 12.70 12.70 12.70 15.09 17.48 15.09 18.26 21.44 18.26 21.44 25.40 20.62 25.40 28.58 23.01 28.58 33.32 22.23 25.40 25.40

350

400

450

14

16

18

355.6

406.4

457.2

6.35

6.35

6.35

7.92

7.92

7.92

9.53

9.53 11.13

9.53 9.53 9.53 11.13 12.70 14.27 15.09 16.66 19.05 12.70 12.70 12.70 19.05 21.44 23.83 23.83 26.19 29.36 27.79 30.96 34.93 31.75 36.53 39.67 35.71 40.49 45.24 — —

500

550

600

20

22

24

508

559

610

6.35

6.35

6.35

9.53

9.53

9.53

12.70 12.70 14.27 9.53 9.53 9.53

15.09

17.48

20.62 22.23 24.61 12.70 12.70 12.70 26.19 28.58 30.96 32.54 34.93 38.89 38.10 41.28 46.02 44.45 47.63 52.37 50.01 53.98 59.54 — —

500

550

600

20

22

24

508

559

610

6.35

6.35

6.35

9.53

9.53

9.53

12.70 12.70 14.27 9.53 9.53 9.53

15.09

— 

17.48

20.62 22.23 24.61 12.70 12.70 12.70 26.19 28.58 30.96 32.54 34.93 38.89 38.10 41.28 46.02 44.45 47.63 52.37 50.01 53.98 59.54 — —

660

700

750

26

28

30

660

711

762

7.92

7.92

7.92

12.70 12.70 12.70

15.88 15.88

9.53 9.53 9.53

— — 12.70 12.70 12.70 — — — — — — — — — — — —

800

850

900

32

34

36

813

864

914

7.92

7.92 7.92

12.70 12.70 12.70 15.88 15.88 15.88 9.53 9.53 9.53 17.48 17.48 19.05 — — 12.70 12.70 12.70 — — — — — — — — — — — —

Hot Expanded Seamless Pipe Production Process

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  • Tags : hot expanded seamless pipe , hot expansion SMLS pipe , large diameter seamless pipe , tubería sin costura expandida en caliente , ASTM A106 hot expanded , API 5L X52 X60 SMLS

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