What standards do your API Steel Pipe products meet?

Our API Steel Pipe products comply with ASTM, BS, JIS, and GB international standards. All products come with mill test certificates and third-party inspection is available upon request.

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Standard

AISI (20)
ASME (233)
ASTM (625)
BS (225)
DIN (232)
EN (156)
GB (265)
JIS (93)

Type

Carbon Structural Steel (65)
Equal (162)
Heavy (292)
Light (141)
Plate (140)
Round (508)
Spring Steel Bar (57)
Steel Coil (71)

Grade

200 Series (16)
300 Series (38)
400 Series (87)
HRB400 (240)
Q195 (410)
Q235B (569)
Q345 (274)
SS400 - SS490 (119)

Applications

Boiler Plate (31)
Construction (406)
Container Plate (127)
Manufacturing (621)
Railway Rail (46)
Steel Fabricated House (146)
Steel Workshop (202)
Structure Pipe (152)

API Steel Pipe

API Steel Pipe Manufacturer and Supplier

Features:

1) Product name: carbon steel pipe

2) Place of Origin: Liaoning, China

3) Material: API 5L line pipe: Gr.A, Gr.B, X-42,X-46,X-52,X-56,X-60,X70,X80,X90

API 5CT tubing and casing pipe: H40, J55

4) Diameter range: 73mm-3048mm

5) Wall thickness: 3.5mm-25.4mm

6) Length: as customers' required

7) Tolerance: meet the standard.

8) Surface: oiled or black painted to prevent rust.

9) Standard: API 5L & API 5CT

10) Certificate: API 5L PSL 2, API 5CT, DNV ISO 9001, DNV ISO 14001, DNV OHSAS 18001

API steel pipes are manufactured to American Petroleum Institute specifications for oil and gas industry applications. Sino East Steel supplies API 5L line pipes (X42-X80), API 5CT casing and tubing (J55, K55, N80, P110), and API 5DP drill pipes. Our API pipes are produced from high-quality steel with strict chemical composition control and mechanical property testing. Available in seamless and welded (ERW, SSAW, LSAW) construction with various end connections and protective coatings. All API products ship with full traceability and certification.

✓ API 5L, 5CT, 5DP certified

✓ Grades: X42-X80, J55-P110

✓ Seamless, ERW, SSAW, LSAW production

✓ Ends: plain, beveled, threaded, coupled

✓ 3LPE, FBE, internal coating systems

Applications: Oil & gas gathering lines, transmission pipelines, oil well casing and tubing, drilling operations, refinery piping, offshore platforms, and natural gas distribution.

Request a Quote for API Steel Pipe →

Steel Pipe Weight Chart (kg/m)

Use this weight chart to calculate steel pipe weight per meter. Formula: Weight (kg/m) = (OD - WT) x WT x 0.02466. Download our complete steel pipe weight chart for all specifications.

Nominal Size	OD (mm)	SCH40 (kg/m)	SCH80 (kg/m)
1/2 inch (DN15)	21.3	1.27	1.62
3/4 inch (DN20)	26.7	1.69	2.20
1 inch (DN25)	33.4	2.50	3.24
2 inch (DN50)	60.3	5.44	7.48
3 inch (DN80)	88.9	8.63	11.80
4 inch (DN100)	114.3	13.49	18.55

Note: Theoretical weights. Actual weight may vary by +/-5%. Contact us for a complete weight chart PDF with all sizes and schedules.

BS1139 Scaffolding Pipe Specifications

Parameter	BS1139 Standard
Outer Diameter	48.3mm +/- 0.5mm
Wall Thickness	3.2mm (standard) / 4.0mm (heavy duty)
Length	6.0m / 6.4m (standard), custom lengths available
Material Grade	S235GT / S355J2H (EN 10219)
Surface Finish	Hot-dip galvanized (HDG) to EN ISO 1461
Zinc Coating	Minimum 55 microns (390 g/m2)
End Finish	Plain end / External upset / Swaged

All Sino East Steel scaffolding pipes comply with BS1139 and EN 39 standards. Mill Test Certificates provided with every order. Contact us for scaffolding system quotations.

Galvanized Pipe vs Black Pipe: Price Comparison 2026

Choosing between galvanized steel pipe and black steel pipe? Here is a detailed price and feature comparison to help B2B buyers make the right choice for their projects.

Factor	Galvanized Steel Pipe	Black Steel Pipe
Price (FOB China, Q2 2026)	$680-800/ton	$600-680/ton
Corrosion Resistance	Excellent - 25-50 year service life	None - requires painting
Best Applications	Water supply, outdoor structures, fencing	Indoor structures, painted applications
Welding	Requires zinc removal at weld zone	Easy, no prep needed
MOQ	5 tons per specification	5 tons per specification
Standards	BS1387, ASTM A53, EN 10255	ASTM A53, API 5L

Verdict: For outdoor or water-contact applications, galvanized pipe is the better investment despite the 10-15% higher upfront cost. For indoor structural use, black pipe offers the most cost-effective solution.

Prices are indicative FOB Tianjin for 25-ton orders. Contact us for a customized quotation based on your specifications.

2 Inch Galvanized Steel Pipe Price Per Meter (Q2 2026)

Specification	OD (mm)	Wall (mm)	Weight (kg/m)	Price/m (USD)	MOQ
2" SCH10	60.3	2.77	3.93	$3.20-3.80	5 tons
2" SCH40 (Standard)	60.3	3.91	5.44	$4.20-5.00	5 tons
2" SCH80 (Heavy)	60.3	5.54	7.48	$5.50-6.50	5 tons

Prices FOB Tianjin, China. Based on galvanized (Z275) coating. Bulk orders (25+ tons) receive 5-8% discount. Mixed specifications accepted in one container.

Updated: 2026-06-30 | Contact Sino East Steel for a firm quotation with your exact specifications.

BS1387 Galvanized Steel Pipe Specifications

Parameter	BS1387 Light	BS1387 Medium	BS1387 Heavy
Outer Diameter	21.3mm - 165.1mm (1/2" to 6")
Wall Thickness	2.0 - 3.2mm	2.6 - 4.0mm	3.2 - 5.0mm
Zinc Coating	Hot-dip galvanized, minimum 55 microns (Z275)
End Type	Plain	Threaded (BSPT)	Threaded or Grooved
Length	5.8m - 6.0m (standard), custom lengths available
Application	Water, gas (low pressure)	Water, gas, fire protection	Steam, high pressure, structural

All Sino East Steel pipes comply with BS1387:1985 standard. Mill Test Certificates (EN 10204 3.1) provided. Equivalent standards: ASTM A53, EN 10255, JIS G3444.

BS1139 Scaffolding Tube Dimensions & Weight Chart

Tube Type	OD (mm)	Wall (mm)	Length (m)	Weight (kg/m)	Weight/piece (kg)
Standard Ledger/Transom	48.3	3.2	6.0	3.56	21.4
Heavy Duty Standard	48.3	4.0	6.0	4.37	26.2
Light Duty Tube	48.3	2.5	6.0	2.82	16.9
Thai/SEA Standard	48.6	3.2	6.0	3.58	21.5

BS1139 / EN 39 compliant. Hot-dip galvanized to EN ISO 1461. 20GP container fits approx. 1,200-1,400 pieces (standard 6m). Custom lengths and mixed specifications available.

For bulk scaffolding tube orders (1000+ pieces): contact Sino East Steel for FOB price quotation.