Wholesale Customized Seamless Carbon Steel Pipe API 5L Gr. B/X42/X52/X65/ X70 Pls1 Psl2 Line Pipe Manufacturer and Supplier

Customized Seamless Carbon Steel Pipe API 5L Gr. B/X42/X52/X65/ X70 Pls1 Psl2 Line Pipe

Short Description:

Custom-designed API 5L CDS pipes conforming to PSL1/PSL2 standards, including Gr.B, X42, X52, X65, and X70 grades, are durable and suitable for oil and gas pipeline transportation.

Usage: API 5L Pipe

Surface: Black

Grades: API 5L Grade B, X42, X52, X56, X60, X65, X70, X80

Outer Diameter Range: 1/2” to 2”, 3”, 4”, 6”, 8”, 10”, 12”, 16 inches, 18 inches, 20 inches, 24 inches up to 40 inches

Delivery Time: 7 – 15 days after deposit

FOB Port: Tianjin Port/Shanghai Port

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Product Detail

Product Tags

Product Detail

Feature	Details
Steel Grades	Available in API 5L Steel Pipe Grade B, X42, X52, X56, X60, X65, X70, and X80
Specification Level	Supplied under PSL1 and PSL2 standards
Outer Diameter	Ranges from 1/2” up to 40”, including common sizes such as 2”, 3”, 4”, 6”, 8”, 10”, 12”, 16”, 18”, 20”, and 24”
Wall Thickness	Covers SCH 10, SCH 20, SCH 40, STD, SCH 80, XS, and up to SCH 160
Production Methods	Manufactured via seamless processes (hot rolled or cold finished), ERW, and SAW (including LSAW, DSAW, SSAW, and HSAW)
Delivery Condition	Provided in as-rolled, normalized, quenched & tempered, or thermomechanically processed states
Pipe Ends	Supplied with beveled ends or plain ends as required
Length	Available in SRL, DRL, standard 20FT (6m), 40FT (12m), or customized lengths upon request
End Protection	Fitted with plastic or steel caps for protection during transport
Surface Treatment	Options include bare, varnished, black painted, FBE coating, 3PE (3LPE), 3PP, CWC, or CRA lining/cladding
Applications	Widely used in oil & gas transmission, water pipelines, energy projects, and other high-pressure industrial applications

API 5L Pipe is a type of carbon steel pipe which is widely used in oil and gas industry for transmission services. And for other fluids (not oil and gas) steam, water and mud etc.

Manufacturing Types

The API 5L standard includes both welded and seamless steel pipes.

Common Welded Pipe Types

Type	Description	Typical Diameter
ERW	Electric Resistance Welded	Less than 24 inches
DSAW / SAW	Double-sided or Submerged Arc Welded	Larger diameters, alternative to ERW
LSAW	Longitudinal Submerged Arc Welded (JCOE process)	Up to 48 inches
SSAW / HSAW	Spiral or Helical Submerged Arc Welded	Up to 100 inches

Seamless pipes are also available for applications requiring higher pressure or corrosion resistance.

Contact Us to Learn the Differences Between ERW, LSAW, and SSAW pipe.

Get detailed dimensions and a quote

Seamless Pipe Types: Hot-rolled Seamless Pipe and Cold-rolled Seamless Pipe

Seamless steel pipes are most commonly used in small-diameter applications, typically under 24 inches. In practice, they are especially preferred for pipelines with diameters below 150 mm (6 inches) due to their superior strength, pressure resistance, and uniform structure.

In addition to standard small-size production, we also supply large-diameter seamless steel pipes to meet special engineering requirements.

Through the hot-rolled manufacturing process, seamless pipes can be produced up to a maximum outer diameter of 20 inches (508 mm). For larger specifications, we adopt a hot expansion process, which enables the production of seamless pipes up to 40 inches (1016 mm).

This advanced forming method ensures that even extra-large seamless pipes maintain:

Precise dimensional accuracy
Excellent mechanical performance
Stable pressure resistance
Reliable quality consistency

As a result, our seamless pipe solutions can support a wide range of demanding applications, from conventional industrial systems to large-scale energy and infrastructure projects.

API 5L Pipe Grade

API 5L includes Grade B, Api 5l X42 Pipe, Api 5l X46 Pipe, Api 5l X52 Pipe, Api 5l X56 Pipe, Api 5l X60 Pipe, Api 5l X65 Pipe, Api 5l X70 Pipe, and Api 5l X80 Pipe. As the grade increases, the requirements become stricter—particularly in terms of carbon equivalent and mechanical properties—to meet the demands of higher-pressure and more critical pipeline applications.

For the same grade, there are also differences between seamless and welded pipes in chemical composition. Welded pipes are typically subject to tighter limits on carbon and sulfur content to ensure better weldability and reliable performance under high-pressure service conditions.

Chemical requirements

Chemical Composition for PSL 1 pipe with t ≤ 0.984”
Steel Grade	Mass fraction, % based on heat and product analyses a,g
	C	Mn	P	S	V	Nb	Ti
	max b	max b	max	max	max	max	max
Seamless Pipe
A	0.22	0.9	0.03	0.03	–	–	–
B	0.28	1.2	0.03	0.03	c,d	c,d	d
X42	0.28	1.3	0.03	0.03	d	d	d
X46	0.28	1.4	0.03	0.03	d	d	d
X52	0.28	1.4	0.03	0.03	d	d	d
X56	0.28	1.4	0.03	0.03	d	d	d
X60	0.28 e	1.40 e	0.03	0.03	f	f	f
X65	0.28 e	1.40 e	0.03	0.03	f	f	f
X70	0.28 e	1.40 e	0.03	0.03	f	f	f
Welded Pipe
A	0.22	0.9	0.03	0.03	–	–	–
B	0.26	1.2	0.03	0.03	c,d	c,d	d
X42	0.26	1.3	0.03	0.03	d	d	d
X46	0.26	1.4	0.03	0.03	d	d	d
X52	0.26	1.4	0.03	0.03	d	d	d
X56	0.26	1.4	0.03	0.03	d	d	d
X60	0.26 e	1.40 e	0.03	0.03	f	f	f
X65	0.26 e	1.45 e	0.03	0.03	f	f	f
X70	0.26e	1.65 e	0.03	0.03	f	f	f
a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%,
b. For every 0.01% decrease in the maximum C content, the maximum Mn content is allowed to be increased by 0.05% with maximum limits of 1.65% for grades ≥ L245 (B) and ≤ L360 (X52), 1.75% for grades > L360 (X52) and < L485 (X70), and 2.00% for grade L485 (X70).
c. Unless otherwise agreed NB + V ≤ 0.06%,
d. Nb + V + TI ≤ 0.15%,
e. Unless otherwise agreed.,
f. Unless otherwise agreed, NB + V = Ti ≤ 0.15%,
g. No deliberate addition of B is permitted and the residual B ≤ 0.001%

Chemical requirements

Chemical Composition for PSL 2 pipe with t ≤ 0.984”

Steel Grade

Mass fraction, % based on heat and product analyses

Carbon Equiv a

Other

CE IIW

CE Pcm

max b

max

max b

max

Seamless and Welded Pipe
BR	0.24	0.4	1.2	0.025	0.015	c	c	0.04	e,l	0.43	0.25
X42R	0.24	0.4	1.2	0.025	0.015	0.06	0.05	0.04	e,l	0.43	0.25
BN	0.24	0.4	1.2	0.025	0.015	c	c	0.04	e,l	0.43	0.25
X42N	0.24	0.4	1.2	0.025	0.015	0.06	0.05	0.04	e,l	0.43	0.25
X46N	0.24	0.4	1.4	0.025	0.015	0.07	0.05	0.04	d,e,l	0.43	0.25
X52N	0.24	0.45	1.4	0.025	0.015	0.1	0.05	0.04	d,e,l	0.43	0.25
X56N	0.24	0.45	1.4	0.025	0.015	0.10f	0.05	0.04	d,e,l	0.43	0.25
X60N	0.24f	0.45f	1.40f	0.025	0.015	0.10f	0.05f	0.04f	g,h,l	As agreed
BQ	0.18	0.45	1.4	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
X42Q	0.18	0.45	1.4	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
X46Q	0.18	0.45	1.4	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
X52Q	0.18	0.45	1.5	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
X56Q	0.18	0.45f	1.5	0.025	0.015	0.07	0.05	0.04	e,l	0.43	0.25
X60Q	0.18f	0.45f	1.70f	0.025	0.015	g	g	g	h,l	0.43	0.25
X65Q	0.18f	0.45f	1.70f	0.025	0.015	g	g	g	h,l	0.43	0.25
X70Q	0.18f	0.45f	1.80f	0.025	0.015	g	g	g	h,l	0.43	0.25
X80Q	0.18f	0.45f	1.90f	0.025	0.015	g	g	g	i,j	As agreed
X90Q	0.16f	0.45f	1.9	0.02	0.01	g	g	g	j,k	As agreed
X100Q	0.16f	0.45f	1.9	0.02	0.01	g	g	g	j,k	As agreed

Welded Pipe
BM	0.22	0.45	1.2	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
X42M	0.22	0.45	1.3	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
X46M	0.22	0.45	1.3	0.025	0.015	0.05	0.05	0.04	e,l	0.43	0.25
X52M	0.22	0.45	1.4	0.025	0.015	d	d	d	e,l	0.43	0.25
X56M	0.22	0.45f	1.4	0.025	0.015	d	d	d	e,l	0.43	0.25
X60M	0.12f	0.45f	1.60f	0.025	0.015	g	g	g	h,l	0.43	0.25
X65M	0.12f	0.45f	1.60f	0.025	0.015	g	g	g	h,l	0.43	0.25
X70M	0.12f	0.45f	1.70f	0.025	0.015	g	g	g	h,l	0.43	0.25
X80M	0.12f	0.45f	1.85f	0.025	0.015	g	g	g	i,j	.043f	0.25
X90M	0.1	0.55f	2.10f	0.02	0.01	g	g	g	i,j	–	0.25
X100M	0.1	0.55f	2.10f	0.02	0.01	g	g	g	i,j	–	0.25
a. SMLS t>0.787”, CE limits shall be as agreed. The CEIIW limits applied fi C > 0.12% and the CEPcm limits apply if C ≤ 0.12%,
b. The allowable manganese (Mn) content shall be increased by 0.05% for each 0.01% reduction in carbon (C) content under the specified maximum, the upper limits of 1.65% for grades ≥ L245 (B) and ≤ L360 (X52), 1.75% for grades > L360 (X52) and < L485 (X70), 2.00% for grades ≥ L485 (X70) and ≤ L555 (X80), and 2.20% for grades > L555 (X80).
c. Unless otherwise agreed Nb = V ≤ 0.06%,
d. Nb = V = Ti ≤ 0.15%,
e. Unless otherwise agreed, Cu ≤ 0.50%; Ni ≤ 0.30% Cr ≤ 0.30% and Mo ≤ 0.15%,
f. Unless otherwise agreed,
g. Unless otherwise agreed, Nb + V + Ti ≤ 0.15%,
h. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 0.50% Cr ≤ 0.50% and MO ≤ 0.50%,
i. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 1.00% Cr ≤ 0.50% and MO ≤ 0.50%,
j. B ≤ 0.004%,
k. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 1.00% Cr ≤ 0.55% and MO ≤ 0.80%,
l. For all PSL 2 pipe grades except those grades with footnotes j noted, the following applies. Unless otherwise agreed no intentional addition of B is permitted and residual B ≤ 0.001%.

Delivery Conditions

PSL1

Grade A: As-rolled, normalized, or normalizing formed
Grade B: As-rolled, normalizing rolled, thermomechanical rolled/formed, normalized, normalized & tempered, or Q&T (SMLS by agreement)
X42–X70: As-rolled, normalizing rolled, thermomechanical rolled/formed, normalized, or normalized & tempered

PSL2

R (As-rolled): BR, X42R
N (Normalized / Tempered): BN, X42N, X46N, X52N, X56N, X60N
Q (Quenched & Tempered): BQ, X42Q, X46Q, X56Q, X60Q, X65Q, X70Q, X80Q, X90Q, X100Q
M (Thermomechanical): BM, X42M, X46M, X56M, X60M, X65M, X70M, X80M
High-strength M: X90M, X100M, X120M

Note: In PSL2, the suffix (R, N, Q, M) is part of the grade designation.

Specification Level : PSL1 , PSL2

PSL (Product Specification Level) is divided into PSL1 and PSL2, and can be understood as different quality levels.

The two differ not only in inspection requirements, but also in chemical composition and mechanical performance. Overall, PSL2 applies tighter controls to meet more demanding service conditions.

Impact Testing: Not required for PSL1; required for PSL2 (except X80 in certain cases)
Non-Destructive Testing (NDT): Not mandatory for PSL1; required for PSL2

NDT methods such as ultrasonic or radiographic testing are used to detect internal defects and ensure material integrity without damaging the pipe.

For more details, contact us to learn more about the differences between API 5L PSL1 and PSL2.

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Why Choose Us as Your API 5L Steel Pipe Supplier

Choosing the right supplier directly impacts your project timeline, cost, and quality. Here’s what sets us apart:

✔ Stable Supply for Large Projects

We maintain consistent production capacity and inventory to support bulk orders and long-term EPC projects without delays.

✔ Full Range of Grades & Sizes

From Grade B to X80, seamless and welded (ERW / LSAW / SSAW) pipes are available in a wide range of sizes and specifications to match different pipeline requirements.

✔ Strict Quality Control

All products are manufactured in accordance with API 5L PSL1 / PSL2 standards, with full inspection records and traceability to ensure reliability in high-pressure applications.

✔ Advanced Coating Solutions

We offer FBE, 3PE, 3PP, CWC, and internal linings, providing long-term corrosion protection for onshore and offshore environments.

✔ Fast Delivery & Flexible Options

With ready stock and efficient production scheduling, we ensure short lead times and support customized requirements (length, coating, packaging).

✔ Global Export Experience

Extensive export experience across Southeast Asia, the Middle East, Africa, and Latin America, with a clear understanding of international standards and project needs.

✔ Competitive Factory Pricing

Direct supply from manufacturer with optimized cost structure, helping you stay competitive in bidding and procurement.

Get a Fast Quote

Send us your requirements (grade, size, quantity, destination), and our team will provide a professional quotation within 12 hours.

Packing and Transportation

Packing & Delivery of API 5L Steel Pipes

1.Standard Packaging: In case of bundled with steel wire, strong and tight.

2.Alternative Packaging: Rust proof or special packing can be offered on your demand.

Note:
1.Avoid pipe undergoing shock, extrusion, cut during transportation, storage and handling.

2.Observe the precautions for carbon steel pipe to keep away from fire, explosion, and poisoning accidents.

3.Do not expose the cell to high temperature or corrosive agent ( if you need to under such condition, please choose high temperature resistant or corrosion resistant pipe ).

4.Select pipes materials, and specifications suitable for ambient,sMedium, Pressure and temperature.

5.Do the necessary inspections and tests prior to use for conformity to quality.

Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)

FAQ

Q1: Are you a factory or a trading company?

A: We are the direct manufacturer for API 5L steel pipe,seamless,ERW, LSAW, DSAW, SSAW, HSAW pipe with full certificated.

Q2: Can you offer the factory-direct prices?

A: Yes, As a manufacturer we can provide you competitive factory direct price without middle men,it will be more economical for your projects.

Q3: Could you please let me know if you are having stock for urgent order?

A: Yes, we have a big stock for typical grades and sizes that for your requirement.

Q4: Can you offer export documents and certificates?

A: Certainly. We issue all required export and test certificates(API 5L test certificates, mill certificates, chemical & mechanical reports and any other documents as required by the import regulations).

Q5: Can you provide customized specifications?

A: Yes, we can customized OD, wall thickness, length and coatings as project required.

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