Seamless Line Pipe, Pressure Pipe and Cold-Drawn Precision Tube

Description

Goldenman supplies Seamless Carbon Steel Pipes and Cold-Drawn Precision Tubes for oil and gas pipelines, refinery piping, high-temperature pressure systems, hydraulic equipment, machinery, structural fabrication and industrial fluid transport.

The complete product range includes:

• API 5L Seamless Line Pipe
• ASTM A106 Seamless High-Temperature Pipe
• ASTM A53 Type S Seamless Pipe
• ASTM A333 Low-Temperature Seamless Pipe
• ASTM A335 Alloy-Steel High-Temperature Pipe
• ASTM A519 Mechanical Tubing
• EN 10305-1 Seamless Cold-Drawn Precision Tube
• EN 10216 Seamless Pressure Pipe
• Schedule 40, Schedule 80, Schedule 160 and XXS Pipe
• Hot-Finished Seamless Pipe
• Cold-Drawn Seamless Pipe
• Heavy-Wall Seamless Pipe
• Black, Painted, Galvanized and Coated Pipe
• Plain-End, Beveled-End and Threaded Pipe

Standard seamless pipe production covers outside diameters from 17.1 to 610 mm, with project supply extending to 914 mm OD and wall thicknesses up to 100 mm.

Precision cold-drawn tubing covers small- and medium-diameter components requiring controlled OD, ID, wall thickness, straightness and surface finish.

Product Short Description

Goldenman Seamless Carbon Steel Pipe is manufactured without a longitudinal weld seam, providing uniform circumferential strength and stable pressure performance.

API 5L configurations serve oil, gas, water and energy pipelines. ASTM A106 configurations serve high-temperature process piping, refineries and power plants. EN 10305-1 and ASTM A519 Cold-Drawn Tubes serve hydraulic cylinders, mechanical components, shafts, sleeves and precision-machined parts.

Available grades include API 5L Grade B through X80, ASTM A106 Grades A, B and C, ASTM A53 Grades A and B, EN 10305-1 E235 and E355, and carbon or alloy mechanical-tubing grades.

Product Highlights

• Seamless construction without longitudinal weld seam
• API 5L line-pipe grades from Grade B to X80
• ASTM A106 Grades A, B and C
• ASTM A53 Type S Grades A and B
• ASTM A333 Grade 6 low-temperature pipe
• ASTM A335 alloy-steel high-temperature pipe
• ASTM A519 mechanical tubing
• EN 10305-1 E235 and E355 precision tubes
• Legacy ST37 and ST52 supply references
• Outside diameters from 17.1 to 610 mm
• Project sizes up to 914 mm OD
• Wall thicknesses from 2 to 100 mm
• Schedule 10 through Schedule 160
• STD, XS and XXS wall designations
• Hot-finished and cold-drawn production
• Standard and heavy-wall configurations
• PSL 1 and PSL 2 API 5L supply
• Normalized and quenched-and-tempered grades
• Random and fixed-length supply
• Plain, beveled, threaded and coupled ends
• Black paint, varnish and rust-preventive oil
• Hot-dip galvanizing
• FBE, 3LPE and 3LPP external coatings
• Hydrostatic and nondestructive testing
• Full material and heat-number traceability
• EN 10204 3.1 and 3.2 documentation
• Cut-to-length and machining services

General Technical Specifications

Parameter	Available Range
Product	Seamless Carbon Steel Pipe and Cold-Drawn Steel Tube
Manufacturing methods	Hot finished, hot rolled and cold drawn
Standard OD range	17.1–610 mm
Extended OD range	Up to 914 mm
Wall thickness	2–100 mm
Nominal pipe size	NPS 3/8–36
Precision-tube OD	4–325 mm
Precision-tube wall	0.5–30 mm
Pipe schedules	Sch 10, 20, 30, 40, 60, 80, 100, 120, 140 and 160
Additional wall designations	STD, XS and XXS
Standard lengths	5.8, 6, 11.8 and 12 m
Precision-tube lengths	Fixed, random and precision-cut lengths
Line-pipe standards	API Spec 5L
High-temperature pipe	ASTM A106/A106M
General-service pipe	ASTM A53/A53M Type S
Low-temperature pipe	ASTM A333/A333M
Alloy high-temperature pipe	ASTM A335/A335M
Mechanical tube	ASTM A519/A519M
Precision cold-drawn tube	EN 10305-1
European pressure pipe	EN 10216
Common line-pipe grades	B, X42, X46, X52, X56, X60, X65, X70 and X80
ASTM A106 grades	Grade A, Grade B and Grade C
Precision-tube grades	E235 and E355
Legacy grade references	ST37 and ST52
End treatment	Plain, beveled, threaded or threaded and coupled
Surface treatment	Bare, oiled, black-painted, varnished or galvanized
External coatings	FBE, 3LPE and 3LPP
Inspection	Dimensions, mechanical properties, hydrostatic test and NDE
Documentation	EN 10204 3.1, 3.2 and third-party inspection

Product Standard Comparison

Standard	Product Type	Main Grades	Principal Applications
API Spec 5L	Seamless line pipe	B–X80	Oil, gas, water and energy pipelines
ASTM A106	Seamless pressure pipe	A, B and C	High-temperature process and refinery piping
ASTM A53 Type S	Seamless general pipe	A and B	Mechanical, pressure and general industrial piping
ASTM A333	Seamless low-temperature pipe	Grade 6 and other grades	Low-temperature and impact-tested piping
ASTM A335	Seamless alloy-steel pipe	P5–P92	Power plants and high-temperature process systems
ASTM A519	Seamless mechanical tubing	1010–4140 and other grades	Machinery, shafts, sleeves and cylinders
EN 10305-1	Cold-drawn precision tube	E235 and E355	Hydraulic, pneumatic and mechanical components
EN 10216	Seamless pressure pipe	P235TR, P265GH and alloy grades	European pressure and boiler systems

API 5L Seamless Line Pipe

API 5L Seamless Line Pipe transports:

• Crude oil
• Natural gas
• Produced water
• Injection water
• Refined petroleum products
• Carbon dioxide
• Industrial process fluids

API 5L Seamless Pipe is produced from a solid steel billet. The billet is heated, pierced, elongated and rolled into a hollow shell before sizing, heat treatment and final inspection.

The absence of a weld seam provides:

• Uniform circumferential properties
• Consistent pressure distribution
• Stable performance under bending
• High resistance to internal pressure
• Suitability for heavy-wall dimensions
• Reliable performance in high-load pipeline sections

API 5L Grade Range

API 5L Grade	Minimum Yield Strength	Minimum Tensile Strength
Grade B / L245	245 MPa	415 MPa
X42 / L290	290 MPa	415 MPa
X46 / L320	320 MPa	435 MPa
X52 / L360	360 MPa	460 MPa
X56 / L390	390 MPa	490 MPa
X60 / L415	415 MPa	520 MPa
X65 / L450	450 MPa	535 MPa
X70 / L485	485 MPa	570 MPa
X80 / L555	555 MPa	625 MPa

Final tensile limits, yield-to-tensile ratios and impact requirements follow the ordered PSL, pipe dimensions and service annex.

API 5L PSL 1

PSL 1 defines standard line-pipe requirements for conventional pipeline applications.

The product package includes:

• Chemical-composition control
• Mechanical-property testing
• Dimensional inspection
• Hydrostatic testing
• Pipe marking
• Heat-number traceability
• Standard manufacturing documentation

PSL 1 is used for:

• Conventional oil pipelines
• Gas gathering systems
• Water pipelines
• Utility lines
• Low- and medium-risk transportation systems

API 5L PSL 2

PSL 2 includes additional control of:

• Chemical composition
• Carbon equivalent
• Yield and tensile-strength limits
• Yield-to-tensile ratio
• Impact toughness
• Heat treatment
• Nondestructive inspection
• Traceability
• Records retention
• Manufacturing process

PSL 2 configurations support:

• High-pressure pipelines
• Long-distance transmission
• Offshore pipelines
• Low-temperature service
• Sour-service pipelines
• CO₂ transportation
• Critical crossing sections
• High-consequence pipeline locations

Sour-Service Line Pipe

Sour-service API 5L Pipe is supplied for fluids containing hydrogen sulfide.

The manufacturing package includes:

• Controlled chemical composition
• Restricted carbon equivalent
• Controlled hardness
• Clean steelmaking practices
• Inclusion control
• Heat-treatment control
• Sulfide-stress-cracking testing
• Hydrogen-induced-cracking testing
• Ultrasonic inspection
• Full heat and pipe traceability

Available sour-service grades include Grade B through high-strength X grades under the specified service requirements.

Offshore Line Pipe

Offshore line-pipe configurations include:

• PSL 2 mechanical-property control
• Charpy impact testing
• Drop-weight tear testing
• Enhanced dimensional tolerances
• Full-body NDE
• End-area inspection
• Weldability control
• Low-temperature toughness
• External coating preparation
• Traceability for each pipe length

ASTM A106 Seamless Pressure Pipe

ASTM A106 Seamless Carbon Steel Pipe is used for high-temperature pressure service.

Principal applications include:

• Oil refineries
• Petrochemical plants
• Chemical-processing plants
• Power-generation systems
• Boiler piping
• Steam lines
• High-temperature water lines
• Compressor stations
• Process manifolds
• Pressure equipment connections

ASTM A106 pipe is suitable for:

• Welding
• Bending
• Flanging
• Forming
• Machining
• Fabricated piping systems

ASTM A106 Mechanical Properties

Grade	Minimum Yield Strength	Minimum Tensile Strength
ASTM A106 Grade A	205 MPa / 30 ksi	330 MPa / 48 ksi
ASTM A106 Grade B	240 MPa / 35 ksi	415 MPa / 60 ksi
ASTM A106 Grade C	275 MPa / 40 ksi	485 MPa / 70 ksi

ASTM A106 Grade A

Grade A provides:

• Lower strength
• High formability
• Good weldability
• Suitability for bending and fabrication
• Compatibility with moderate-pressure systems

ASTM A106 Grade B

Grade B is the principal commercial grade for refinery and process-piping systems.

It provides:

• Balanced strength and weldability
• Broad size availability
• Compatibility with standard pipe schedules
• Reliable high-temperature pressure performance
• Wide availability of fittings and flanges

ASTM A106 Grade C

Grade C provides increased yield and tensile strength.

It is used in:

• Higher-pressure piping
• Heavy-wall pipe
• High mechanical-load systems
• Applications requiring increased allowable stress
• Engineered process-piping systems

ASTM A53 Type S Seamless Pipe

ASTM A53 Type S covers seamless black and hot-dip galvanized steel pipe.

Available grades include:

• ASTM A53 Grade A
• ASTM A53 Grade B

Applications include:

• Industrial piping
• Water systems
• Air systems
• Mechanical systems
• Fire-protection piping
• Structural fabrication
• General pressure service
• Threaded and coupled pipe systems

ASTM A53 differs from ASTM A106 because A53 also covers welded pipe and galvanized supply, while A106 focuses specifically on seamless carbon steel pipe for high-temperature service.

ASTM A333 Low-Temperature Pipe

ASTM A333 Seamless Pipe is used in low-temperature service and applications requiring notch toughness.

Available configurations include:

• ASTM A333 Grade 6
• Normalized heat treatment
• Charpy impact testing
• Low-temperature mechanical properties
• Seamless and heavy-wall dimensions

Applications include:

• Low-temperature oil and gas facilities
• LNG support systems
• Cold-region pipelines
• Refrigeration plants
• Low-temperature process piping
• Outdoor pressure systems in severe climates

ASTM A335 Alloy-Steel Pipe

ASTM A335 covers seamless ferritic alloy-steel pipe for high-temperature service.

Available grades include:

• P5
• P9
• P11
• P12
• P22
• P23
• P91
• P92

Applications include:

• Power plants
• Superheater piping
• Reheater piping
• High-temperature steam systems
• Petrochemical furnaces
• Hydrogen-processing units
• High-temperature refinery systems

Alloy content provides improved high-temperature strength, creep resistance and oxidation performance.

Schedule 40 Seamless Pipe

Schedule 40 identifies a standardized wall-thickness series.

It does not independently define:

• Steel grade
• Material standard
• Pressure rating
• Manufacturing process
• Operating temperature
• Corrosion allowance

A Schedule 40 pipe is ordered with a complete designation such as:

ASTM A106 Grade B, NPS 4, Schedule 40, Seamless, Beveled Ends

Common Schedule 40 Dimensions

NPS	Outside Diameter	Schedule 40 Wall Thickness
1/2 in	21.3 mm	2.77 mm
3/4 in	26.7 mm	2.87 mm
1 in	33.4 mm	3.38 mm
1-1/4 in	42.2 mm	3.56 mm
1-1/2 in	48.3 mm	3.68 mm
2 in	60.3 mm	3.91 mm
2-1/2 in	73.0 mm	5.16 mm
3 in	88.9 mm	5.49 mm
3-1/2 in	101.6 mm	5.74 mm
4 in	114.3 mm	6.02 mm
5 in	141.3 mm	6.55 mm
6 in	168.3 mm	7.11 mm
8 in	219.1 mm	8.18 mm
10 in	273.0 mm	9.27 mm
12 in	323.9 mm	10.31 mm
14 in	355.6 mm	11.13 mm
16 in	406.4 mm	12.70 mm
18 in	457.2 mm	14.27 mm
20 in	508.0 mm	15.09 mm
22 in	558.8 mm	15.88 mm
24 in	609.6 mm	17.48 mm

Heavy-Wall Seamless Pipe

Heavy-Wall Seamless Pipe is supplied for:

• High internal pressure
• High external pressure
• Mechanical loading
• Machined components
• Thick-wall fittings
• Pressure vessels
• Forging blanks
• Hydraulic cylinders
• High-pressure manifolds

Available wall designations include:

• Schedule 80
• Schedule 100
• Schedule 120
• Schedule 140
• Schedule 160
• XS
• XXS
• Custom wall thicknesses

Heavy-wall pipe undergoes controlled piercing, rolling, heat treatment and internal-surface inspection.

Cold-Drawn Seamless Steel Tube

Cold drawing pulls a hot-finished hollow tube through a precision die and over a mandrel.

The process improves:

• Outside-diameter tolerance
• Inside-diameter tolerance
• Wall-thickness control
• Roundness
• Concentricity
• Straightness
• Surface finish
• Mechanical properties
• Machining performance

Cold-Drawn Seamless Tubes are used where ordinary pipe tolerances are insufficient.

EN 10305-1 Precision Tubes

EN 10305-1 covers Seamless Cold-Drawn Steel Tubes for precision applications.

Available grades include:

• E215
• E235
• E275
• E355
• Project-specific carbon and alloy grades

Principal applications include:

• Hydraulic cylinders
• Pneumatic cylinders
• Telescopic cylinders
• Piston tubes
• Pump barrels
• Shafts
• Axles
• Sleeves
• Bearing rings
• Automotive components
• Injection systems
• Machine-tool components
• Textile machinery
• Precision-fabricated parts

ST37 and ST52 Grade References

ST37 and ST52 are legacy German purchasing designations.

Modern precision-tube orders use:

• E235 for the common ST37-strength class
• E355 for the common ST52-strength class

The final product designation includes the EN 10305-1 grade and delivery condition.

Examples:

• EN 10305-1 E235 +N
• EN 10305-1 E355 +N
• EN 10305-1 E355 +SR
• EN 10305-1 E355 +C

EN 10305-1 Delivery Conditions

Condition	Description
+C	Cold drawn, hard
+LC	Cold drawn, soft
+SR	Cold drawn and stress relieved
+A	Annealed
+N	Normalized

+C Cold Drawn Hard

The tube receives no heat treatment after final cold drawing.

It provides:

• High strength
• High dimensional accuracy
• Reduced ductility
• Good machining performance
• Stable finished dimensions

+LC Cold Drawn Soft

A controlled drawing pass follows heat treatment.

It provides:

• Improved formability
• Controlled dimensions
• Smooth surfaces
• Suitability for light bending and forming

+SR Stress Relieved

The tube undergoes stress-relief heat treatment after cold drawing.

It provides:

• Reduced residual stress
• Improved dimensional stability
• Better machining performance
• Reduced distortion during cutting and fabrication

+A Annealed

The tube is annealed in a controlled atmosphere.

It provides:

• High ductility
• Good formability
• Reduced hardness
• Suitability for significant forming operations

+N Normalized

The tube is normalized after cold drawing.

It provides:

• Uniform microstructure
• Balanced strength and ductility
• Stable mechanical properties
• Good welding and fabrication performance

ASTM A519 Mechanical Tubing

ASTM A519 covers seamless carbon- and alloy-steel mechanical tubing in hot-finished and cold-finished conditions.

Available grades include:

• 1010
• 1020
• 1026
• 1035
• 1045
• 4130
• 4140
• 4140 normalized
• Project-specific alloy grades

Available shapes include:

• Round
• Square
• Rectangular
• Special sections

Applications include:

• Hydraulic-cylinder tubes
• Machined sleeves
• Shafts
• Rollers
• Axles
• Structural machine components
• Drilling-equipment components
• Oilfield-tool bodies
• Pump components
• Heavy-duty mechanical parts

Hot-Finished vs Cold-Drawn Tube

Feature	Hot-Finished Seamless Pipe	Cold-Drawn Seamless Tube
Main advantage	Broad sizes and heavy walls	Precision dimensions and smooth surfaces
Dimensional tolerance	Standard pipe tolerance	Tighter OD, ID and wall tolerance
Surface finish	Hot-finished surface	Smooth cold-drawn surface
Size range	Small to very large	Small and medium diameters
Wall range	Thin to extremely heavy	Thin to medium-heavy
Mechanical properties	Heat-treatment dependent	Cold-work and heat-treatment dependent
Typical application	Pipelines and pressure piping	Hydraulic and mechanical components
Machining allowance	Greater	Reduced
Straightness	Standard	Improved
Cost	Lower for general pipe	Higher for precision applications

Manufacturing Process

Hot-Finished Seamless Pipe

1. Steel-billet inspection
2. Billet heating
3. Rotary piercing
4. Mandrel rolling or extrusion
5. Elongation
6. Sizing or stretch reduction
7. Heat treatment
8. Straightening
9. End cutting
10. Dimensional inspection
11. Nondestructive examination
12. Hydrostatic testing
13. End finishing
14. Coating and marking

Cold-Drawn Seamless Tube

1. Hot-finished mother-tube production
2. Pickling
3. Phosphating and lubrication
4. Pointing
5. Die and mandrel preparation
6. Cold drawing
7. Intermediate heat treatment
8. Repeated drawing
9. Final heat treatment
10. Straightening
11. Precision cutting
12. Dimensional inspection
13. Surface inspection
14. Nondestructive examination
15. Cleaning and oiling

End Treatments

Available end treatments include:

• Plain ends
• Square-cut ends
• Beveled ends
• Threaded ends
• Threaded and coupled ends
• Grooved ends
• Expanded ends
• Reduced ends
• Machined ends
• Custom connection preparation

Beveled Ends

Beveled ends are supplied for field or shop welding.

The bevel includes:

• Controlled bevel angle
• Root face
• Square end plane
• Internal deburring
• External deburring
• End-area inspection

Threaded and Coupled Ends

Threaded pipe is supplied with:

• Tapered pipe threads
• Matching couplings
• Thread compound
• Plastic or metal protectors
• Galvanized or black finish

Surface Treatments

Available surface conditions include:

• Bare steel
• Rust-preventive oil
• Black paint
• Clear varnish
• Color paint
• Hot-dip galvanizing
• Zinc coating
• Phosphate coating
• Shot-blasted surface
• Machined surface

Pipeline Coatings

Fusion-Bonded Epoxy

FBE provides:

• Strong adhesion
• Chemical resistance
• Soil-corrosion protection
• Cathodic-protection compatibility
• Smooth external surface

Three-Layer Polyethylene

3LPE consists of:

• Epoxy primer
• Adhesive layer
• Polyethylene outer layer

It provides:

• Corrosion protection
• Impact resistance
• Moisture resistance
• Long buried-pipeline life

Three-Layer Polypropylene

3LPP provides:

• High-temperature resistance
• Mechanical protection
• Chemical resistance
• Offshore and buried-pipeline durability

Internal linings include epoxy, cement mortar and project-specific flow coatings.

Applications

Goldenman Seamless Carbon Steel Pipes and Tubes are used in:

• Oil transmission pipelines
• Gas transmission pipelines
• Gathering lines
• Flowlines
• Water-injection systems
• Produced-water systems
• Refineries
• Petrochemical plants
• Chemical plants
• Power plants
• Boiler systems
• Steam lines
• Compressor stations
• Hydraulic systems
• Mechanical equipment
• Mining equipment
• Construction machinery
• Automotive components
• Pressure vessels
• Heat exchangers
• Structural fabrication
• Geothermal systems
• Offshore facilities
• Industrial fluid systems

Pipe Selection Logic

Pipeline Service

Specify:

• API 5L
• PSL 1 or PSL 2
• Grade B through X80
• Seamless manufacturing
• Impact-test temperature
• Sour-service requirements
• External coating
• Pipe-end configuration

High-Temperature Pressure Service

Specify:

• ASTM A106
• Grade A, B or C
• NPS
• Schedule or wall thickness
• Design temperature
• Beveled or plain ends
• NDE and hydrostatic testing

Low-Temperature Service

Specify:

• ASTM A333
• Material grade
• Impact-test temperature
• Wall thickness
• Heat treatment
• NDE requirements

Precision Mechanical Service

Specify:

• ASTM A519 or EN 10305-1
• Finished OD
• Finished ID
• Wall thickness
• Steel grade
• Delivery condition
• Surface roughness
• Straightness
• Cut length
• Machining allowance

Quality Control

Goldenman quality control includes:

• Steelmaking-route verification
• Heat-number traceability
• Chemical-composition testing
• Carbon-equivalent calculation
• Billet inspection
• Heat-treatment monitoring
• Yield-strength testing
• Tensile-strength testing
• Elongation testing
• Flattening testing
• Bend testing
• Hardness testing
• Charpy impact testing
• Drop-weight tear testing
• Hydrostatic testing
• Ultrasonic testing
• Eddy-current testing
• Magnetic-flux-leakage testing
• Magnetic-particle inspection
• OD inspection
• Wall-thickness measurement
• Ovality inspection
• Straightness inspection
• End-area inspection
• Surface inspection
• Coating inspection
• Marking verification

Nondestructive Examination

Available NDE methods include:

• Ultrasonic testing
• Eddy-current testing
• Magnetic-flux-leakage inspection
• Magnetic-particle inspection
• Electromagnetic inspection
• Visual and dimensional inspection

Inspection scope covers:

• Longitudinal imperfections
• Transverse imperfections
• Laminations
• Wall-thickness variation
• End-area defects
• Surface cracks
• Internal discontinuities

Hydrostatic Testing

Hydrostatic testing verifies the pressure integrity of the finished pipe.

The test program controls:

• Test pressure
• Pressure hold time
• Gauge calibration
• External leakage
• Permanent deformation
• Test-water quality
• Pipe identification
• Test-record traceability

Nondestructive electric testing is supplied in accordance with the ordered product specification.

Dimensional Inspection

Dimensional inspection covers:

• Outside diameter
• Inside diameter
• Wall thickness
• Ovality
• Eccentricity
• Straightness
• Length
• End squareness
• Bevel geometry
• Internal and external surface condition
• Pipe weight per unit length

Cold-drawn tubes receive additional inspection of:

• Tight OD tolerance
• Tight ID tolerance
• Concentricity
• Surface roughness
• Precision-cut length
• Machining allowance

Product Marking

Each pipe is marked with:

• Goldenman identification
• Product standard
• Steel grade
• PSL where applicable
• Pipe size
• Wall thickness or schedule
• Heat number
• Pipe number
• Manufacturing method
• Hydrostatic or NDE identification
• Length
• Coating type
• Sour-service designation
• Manufacturing date

Product Documentation

The supply package includes:

• Certificate of Conformity
• Material Test Certificate
• EN 10204 3.1 certificate
• EN 10204 3.2 certificate
• Chemical-composition report
• Mechanical-property report
• Heat-treatment record
• Hardness report
• Impact-test report
• DWTT report
• Hydrostatic-test report
• Ultrasonic-test report
• Eddy-current-test report
• Dimensional inspection report
• Surface inspection report
• Coating inspection report
• Pipe and heat traceability list
• Packing list
• Third-party inspection report

Packaging

Packaging options include:

• Hexagonal bundles
• Steel-strip bundles
• Wooden frames
• Wooden crates
• Individual heavy-wall-pipe handling
• Plastic end caps
• Thread protectors
• Waterproof wrapping
• Export seaworthy packaging

Small precision tubes are protected with:

• Rust-preventive oil
• Plastic wrapping
• Internal separators
• Wooden cases
• Moisture-resistant packaging

Frequently Asked Questions

What is Seamless Carbon Steel Pipe?

Seamless Carbon Steel Pipe is manufactured from a solid steel billet without a longitudinal weld seam.

The billet is pierced and rolled into a hollow pipe before heat treatment, sizing and testing.

What sizes are available?

The standard seamless range covers outside diameters from 17.1 to 610 mm.

Large project pipe extends to 914 mm OD, with wall thicknesses up to 100 mm.

Is this page only for Schedule 40 Pipe?

No.

The range includes Schedule 10 through Schedule 160, STD, XS, XXS and custom heavy-wall sizes.

What is the difference between API 5L and ASTM A106?

API 5L is used for oil, gas, water and energy-transport pipelines.

ASTM A106 is used for seamless carbon steel pressure pipe in high-temperature industrial service.

What is the difference between ASTM A106 and ASTM A53?

ASTM A106 covers seamless carbon steel pipe for high-temperature service.

ASTM A53 covers seamless and welded black or galvanized pipe for mechanical, pressure and general industrial applications.

What is the most common ASTM A106 grade?

ASTM A106 Grade B is the principal commercial grade for refinery, petrochemical, power-generation and process-piping systems.

What does Schedule 40 mean?

Schedule 40 identifies a standardized wall thickness for each nominal pipe size.

It does not identify the steel grade or operating-pressure rating.

Is Schedule 40 the same wall thickness for every pipe size?

No.

The Schedule 40 wall thickness increases as nominal pipe size increases.

What is API 5L PSL 2?

PSL 2 contains additional chemical, mechanical, toughness, inspection and traceability requirements compared with PSL 1.

Are X70 and X80 Seamless Pipes available?

Yes.

Goldenman supplies high-strength API 5L Seamless Line Pipe through X80 for engineered pipeline projects.

Are sour-service pipes available?

Yes.

Sour-service configurations include controlled hardness, HIC testing, SSC testing, impact testing and enhanced NDE.

What is the difference between hot-finished and cold-drawn pipe?

Hot-finished pipe provides broad size and heavy-wall availability.

Cold-drawn tube provides tighter dimensional tolerances, smoother surfaces and improved straightness.

Are ST37 and ST52 still used?

ST37 and ST52 remain common commercial references.

Modern EN 10305-1 orders use E235 and E355 grade designations with the specified delivery condition.

What does E355 +N mean?

E355 identifies the steel grade.

+N identifies the normalized delivery condition after cold drawing.

Are fixed lengths available?

Yes.

Goldenman supplies standard, random, fixed and precision-cut lengths.

Are beveled ends available?

Yes.

Plain, beveled, threaded, coupled, grooved and machined ends are available.

Are external coatings available?

Yes.

Available coatings include black paint, varnish, galvanizing, FBE, 3LPE and 3LPP.

Information Required for Quotation

Please provide:

• Product standard
• Steel grade
• API 5L PSL level
• Seamless hot-finished or cold-drawn construction
• Nominal pipe size
• Outside diameter
• Inside diameter
• Wall thickness
• Pipe schedule
• Quantity
• Joint length
• Random or fixed length
• Plain, beveled or threaded ends
• Coupling requirement
• Operating fluid
• Design pressure
• Design temperature
• Minimum design temperature
• Sour-service requirement
• H₂S concentration
• CO₂ concentration
• HIC testing
• SSC testing
• Charpy impact testing
• DWTT requirement
• Hydrostatic testing
• NDE requirements
• Surface treatment
• External coating
• Internal lining
• Dimensional tolerances
• Surface-roughness requirement
• EN 10204 certificate type
• Third-party inspection
• Destination country
• Delivery schedule

Request a Technical Quotation

Goldenman supplies Seamless Carbon Steel Pipes and Cold-Drawn Precision Tubes for pipeline, refinery, petrochemical, power-generation, hydraulic and mechanical applications.

The complete range covers:

• API 5L Grade B through X80 Line Pipe
• ASTM A106 Grades A, B and C
• ASTM A53 Type S Seamless Pipe
• ASTM A333 Low-Temperature Pipe
• ASTM A335 Alloy-Steel Pipe
• ASTM A519 Mechanical Tubing
• EN 10305-1 E235 and E355 Precision Tubes
• Outside diameters from 17.1 to 610 mm
• Project sizes up to 914 mm
• Wall thicknesses up to 100 mm
• Schedule 10 through Schedule 160
• STD, XS, XXS and custom heavy-wall dimensions

Complete orders are supplied with material traceability, mechanical-property reports, hydrostatic testing, nondestructive examination, dimensional inspection and export packaging.

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