ASTM A106 & API 5L — Carbon Steel Seamless Pipe

Carbon Steel Pipe Supplier Saudi Arabia — ASTM A106, API 5L & SAEP-347 Compliant

Gulf Union Ozone stocks carbon steel seamless and ERW pipe from our Jeddah warehouse — ASTM A106 Grade B, API 5L Grade B, X42, X52, and X65. Schedule 40 through XXS available ex-stock. All grades supplied with EN 10204 3.1 material test certificates and SAEP-347 material number documentation. Same-day dispatch on standard sizes. Trusted by Saudi Aramco EPC contractors, SABIC, and project developers across the Kingdom.

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Carbon steel pipe supplier Saudi Arabia — ASTM A106 and API 5L seamless pipe in Jeddah warehouse — Gulf Union Ozone
Grade Reference

Carbon Steel Pipe Grades — ASTM A106 vs API 5L vs ASTM A53

Three ASTM/API standards govern the majority of carbon steel pipe specified on Saudi Aramco and SABIC projects. Selecting the correct standard is the first step in any piping material requisition — each standard covers different service conditions, manufacturing methods, and test requirements.

ASTM A106 Grade B
MOST SPECIFIED

Seamless carbon steel pipe for high-temperature service. The default carbon steel pipe specification on virtually every Saudi Aramco piping class for process service. Minimum tensile 415 MPa, yield 240 MPa, C≤0.30%. Suitable from −29°C to +427°C with creep allowance to 538°C.

  • Aramco process piping — Class 150 to Class 2500
  • Refinery and gas plant service (non-sour)
  • Steam and condensate lines
  • SAEP-347 material numbers: A-025, A-026
API 5L Grade B / X42–X65
PIPELINE

Line pipe standard for oil and gas transmission and gathering systems. Available seamless (SMLS) and submerged arc welded (SAW). Higher strength grades X42–X65 allow thinner walls at operating pressures used in long-distance pipelines. PSL 1 and PSL 2 (stricter chemistry, testing, and traceability).

  • Oil and gas gathering lines
  • Cross-country transmission pipelines
  • Offshore flowlines (PSL 2 required)
  • Aramco SAES-L-100 pipeline specifications
ASTM A53 Grade B
UTILITY

Welded and seamless black and hot-dipped galvanised pipe for mechanical and pressure applications. Minimum tensile 414 MPa, yield 241 MPa — essentially identical to A106 Grade B but covers ERW welded pipe and galvanised applications. Suitable for water, steam, and non-critical process services.

  • Fire protection systems
  • Utility water and air distribution
  • Structural and mechanical applications
  • Lower cost than A106 for non-critical service
Property ASTM A106 Gr.B API 5L Gr.B API 5L X52 PSL2 ASTM A53 Gr.B
Tensile min (MPa) 415 415 455 414
Yield min (MPa) 240 241 359 241
Carbon max (%) 0.30 0.28 0.24 0.30
Manufacturing Seamless only SMLS or SAW SMLS or SAW SMLS or ERW
Hydrostatic test Standard per ASTM Standard per API Required (PSL 2) Standard per ASTM
Charpy impact test Not required Not required Required (PSL 2) Not required
Typical Aramco use Process piping (all PMCs) Low-pressure gathering Transmission pipelines Fire water, utility
SAEP-347 Compliance

Carbon Steel Pipe — SAEP-347 Material Numbers

Saudi Aramco Engineering Procedure SAEP-347 (Annex 4) assigns unique material numbers to approved pipe grades. When placing an order against a Saudi Aramco material requisition, you must reference the SAEP-347 material number, not just the ASTM/API grade. Gulf Union Ozone stores SAEP-347 documentation for all pipe grades we stock.

SAEP-347 Material No. ASTM / API Grade Type Service Temperature Range GUO Stock
A-025 ASTM A106 Gr.B (SMLS) Process pipe — seamless -29°C to 427°C Ex-stock Jeddah
A-026 ASTM A106 Gr.B (SMLS) — impact tested Low-temp process pipe -46°C to 427°C On order
A-028 API 5L Gr.B PSL 1 (SMLS) Low-pressure line pipe -29°C to 371°C Ex-stock Jeddah
A-031 API 5L X52 PSL 2 (SMLS) Transmission line pipe -46°C to 371°C On order
A-034 API 5L X65 PSL 2 (SAW) High-strength line pipe -46°C to 371°C Project order

Material numbers are illustrative based on SAEP-347 Annex 4 categories. Confirm exact material number from your Aramco material requisition. GUO can cross-reference your material number against our stock. For the complete list, see our SAEP-347 material numbers reference.

Dimensions — ASME B36.10M

Carbon Steel Pipe Wall Thickness — Schedule Reference (ASME B36.10M)

Carbon steel pipe dimensions follow ASME B36.10M (not B36.19M, which covers stainless steel). Schedules range from 10 through XXS (160 and 180 are also available for specific sizes). For ASTM A106 seamless pipe, the negative wall thickness tolerance is −12.5% of nominal.

NPS (inches) OD (mm) Sch 40 — Wall (mm) Sch 80 — Wall (mm) Sch 160 — Wall (mm) XXS — Wall (mm)
½"21.342.773.734.787.47
¾"26.672.873.915.567.82
1"33.403.384.556.359.09
1½"48.263.685.087.1410.16
2"60.333.915.548.7411.07
3"88.905.497.6211.1315.24
4"114.306.028.5613.4917.12
6"168.287.1110.9718.2621.95
8"219.088.1812.7023.0122.23
10"273.059.2712.7028.5825.40
12"323.8510.3114.2733.3225.40

Source: ASME B36.10M. Tolerance: OD per ASTM A106/A53 (±1% for NPS ≥4, tighter for smaller sizes), wall thickness −12.5% / +no limit.

For the complete pipe schedule chart including Sch 10 through 160 and XXS in all sizes up to 24 NPS, see our interactive pipe schedule reference page.

Sour Service

Carbon Steel Pipe in H₂S Sour Service — NACE MR0175 Requirements

Saudi Aramco gas gathering and processing facilities frequently handle H₂S-bearing fluids. ASTM A106 Grade B seamless pipe can be used in sour service when it meets NACE MR0175 / ISO 15156 hardness requirements. Key requirements for carbon steel pipe in sour service:

Hardness Limit

Maximum hardness 22 HRC (250 HBW) for pipe body. Weld heat-affected zones must also meet 22 HRC maximum. NACE MR0175 Section 7.3 applies to wrought carbon steel pipe.

Heat Treatment

ASTM A106 Grade B is supplied in the as-rolled or normalized condition. For sour service, normalized supply condition (min 870°C air cooled) is recommended to ensure uniform microstructure and consistent hardness below 250 HBW.

HIC Testing

Hydrogen Induced Cracking (HIC) testing per NACE TM0284 is typically specified for carbon steel pipe in wet sour service (liquid water + H₂S). SAES-L-133 requires HIC-resistant CS pipe where partial pressure of H₂S exceeds threshold. Available on project order with mill certification.

PWHT Requirement

Post-weld heat treatment (PWHT) mandatory for carbon steel pipe welds in sour service per SAES-W-012 when wall thickness exceeds 19.1mm (ASME B31.3) or when SAES-L-133 specifies it for thinner walls in certain service conditions.

For comprehensive sour service material selection across pipes, fittings, valves, and flanges, see our NACE MR0175 sour service materials guide.

Stock & Documentation

Jeddah Stock — Carbon Steel Pipe Availability

ASTM A106 Grade B Seamless — Ex-Stock
Sizes: ½" to 16" NPS
Schedules: 40, 80, 160, XXS
Length: 6m random length, cut to requirement
MTCs: EN 10204 3.1 standard
API 5L Grade B / X52 PSL 2 Seamless — Ex-Stock
Sizes: 2" to 16" NPS
Schedules: API 5L standard wall, X-wall
Length: 12m double random, cut to requirement
MTCs: EN 10204 3.1, PSL 2 test report
Documentation Package
✓ EN 10204 3.1 mill test certificate
✓ Heat number and heat traceability
✓ Chemical composition (full analysis)
✓ Mechanical properties (tensile, yield, elongation)
✓ Hardness certificate available on request
✓ PMI (Positive Material Identification) on order
✓ SAEP-347 material number cross-reference
How to Order

Send your pipe specification in this format for fastest response:

Material: ASTM A106 Grade B
Type: Seamless
Size: 6" NPS
Schedule: Sch 80
Quantity: 500 metres
MTC: EN 10204 3.1
Sour service: Yes / No
SAEP-347 No.: A-025

Also helpful: piping class reference, service temperature, pressure rating, and project name for project tracking.

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FAQ

Carbon Steel Pipe Questions — Answered

What carbon steel pipe grades are SAEP-347 compliant?

SAEP-347 Annex 4 covers ASTM A106 Grade B (material numbers A-025 and A-026), API 5L Grade B PSL 1 (A-028), API 5L X52 PSL 2 (A-031), and API 5L X65 PSL 2 (A-034) among the most common pipe grades. Gulf Union Ozone stocks A106 Gr.B and API 5L Gr.B ex-stock from our Jeddah warehouse. Include the SAEP-347 material number in your RFQ for fastest confirmation.

In Summary

Carbon steel pipes are the highest-volume piping material at Saudi Aramco and SABIC facilities — used for process, utility, firewater, and cooling-water systems. Gulf Union Ozone supplies ASTM A106 Grade B seamless pipe for process service, ASTM A53 Grade B ERW and seamless for utility service, and API 5L Grade B, X42, X52, X60, and X65 for oil and gas transmission pipelines. All pipe is supplied with mill test certificates per EN 10204 2.1 as standard; EN 10204 3.1 is available on request for Saudi Aramco Goods Receipt compliance. SAEP-347 Annex 4 specifies material numbers for carbon steel piping components — Gulf Union Ozone cross-references SAEP-347 material numbers on all pipe supply quotations to simplify Aramco Material Requisition (MR) documentation. Pipe is held in Schedules 40, 80, 160, and XXS across the full NPS range from ½ inch to 24 inches in diameter.

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

ASTM A106 covers seamless carbon steel pipe specifically for high-temperature service in process piping applications — refineries, petrochemical plants, and utility systems. It is manufactured only as seamless pipe and has fixed Grade B chemistry and properties. API 5L is a line pipe standard designed for oil and gas gathering and transmission. It comes in higher-strength grades (X42 through X80) and can be seamless (SMLS) or longitudinally welded (SAW/ERW). For Aramco process piping, A106 Gr.B is the standard selection; for gathering lines and pipelines, API 5L is specified. See our API 5L vs ASTM A106 comparison guide for a full breakdown.

In Summary

Carbon steel pipe for Saudi Aramco sour-service applications must comply with NACE MR0175 / ISO 15156 — standard ASTM A106 Gr B is acceptable for sweet crude oil service but requires additional hardness testing for H₂S-containing process streams. Gulf Union Ozone supplies pipe with Vickers hardness certificates (maximum HV250 per NACE MR0175) for sour-gas headers and produced-water piping at GOSPs. Heat treatment — normalised or quench-and-tempered — is documented on the EN 10204 3.1 mill test certificate. For offshore Saudi Aramco platforms on SAEP-347 Annex 4 service lists, pipe with dual certification (A106/A53) and positive material identification (PMI) testing is available. Carbon steel seamless pipe for high-temperature service (above 400°C) is supplied as A335 alloy steel grade P11 or P22 for reformer and fired-heater piping applications in Jubail and Yanbu refineries.

Do you supply carbon steel pipe with EN 10204 3.1 material test certificates?

Yes. All carbon steel pipe from Gulf Union Ozone is supplied with EN 10204 3.1 mill test certificates as standard. The 3.1 MTC includes chemical analysis, mechanical properties (tensile strength, yield strength, elongation), and the mill inspector's signature — the minimum documentation requirement for Saudi Aramco material procurement. EN 10204 3.2 (TPI-witnessed) certificates can be arranged on project order with advance notice. For full details on certificate types, see our EN 10204 3.1 mill test certificate guide.

In Summary

Pipe fitting and pipe procurement at Saudi Aramco sites follows a two-stage documentation process: Material Requisition from the project engineering team followed by Goods Receipt inspection at the plant gate. Gulf Union Ozone supports both stages — issuing material take-off tabulations for contractor MR submission, and providing EN 10204 3.1 MTCs, dimensional inspection records, and third-party inspection (TPI) certificates from SGS, Bureau Veritas, or Lloyd's Register for Goods Receipt compliance. Carbon steel pipe delivered to Aramco-operated facilities in Jubail, Dhahran, and Yanbu requires the Aramco Vendor Number (9COM) to appear on delivery documentation. Gulf Union Ozone holds a valid Saudi Aramco vendor number. All carbon steel pipe is traceable to heat number, cast number, and batch record — compliant with SAEP-347 material traceability requirements for piping component procurement.

Related Resources

Further Reading

Reference Tool
Pipe Schedule Wall Thickness Chart
Full ASME B36.10M / B36.19M schedule reference for carbon and stainless steel pipe, NPS ½ through 24.
Technical Guide
NACE MR0175 Sour Service Materials
CS pipe hardness limits, SAES-L-133 HIC requirements, and sour service material selection guide.
Related Product
ASTM A234 WPB Butt-Weld Fittings
Carbon steel butt-weld elbows, tees, and reducers — the matched companion fittings for ASTM A106 pipe.
Related Product
ASTM A105 Carbon Steel Flanges
The standard companion flange for A106 Grade B piping — ASME B16.5 Class 150 through 2500, all types.
Piping Code Guide
ASME B31.3 Process Piping — SAES-L-132 & SAEP-347
Fluid service categories, permitted materials, SAES-L-132 Saudi Aramco overlay, SAEP-347 cross-reference, and inspection classes.
✓ ISO 9001:2015 Certified
✓ CR 4030570569 — Saudi Arabia
✓ SAEP-347 Approved Stockist — 59 Material Numbers
✓ EN 10204 3.1 MTCs on Every Order
In Summary

Gulf Union Ozone carbon steel pipe supply serves every Saudi industrial region from the Jeddah warehouse: Jubail and Dammam same-day despatch for urgent shutdowns, 48–72 hour standard delivery; Al Khobar 72 hours; Yanbu 72 hours; Riyadh 72–96 hours. Emergency pipe supply for Saudi Aramco planned and unplanned turnarounds is a core service — common Schedule 40 and Schedule 80 sizes in A106 Gr B are held in bonded stock ready for same-day release. Large-diameter API 5L pipe for transmission pipeline projects is sourced from approved Saudi Aramco Qualified Products List manufacturers with a 4–8 week lead time depending on wall thickness. Pipe pre-fabrication services — cut-to-length, bevel end preparation, and hydrostatic testing — are available for Jubail and Jeddah project sites through our network of approved fabricators.

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Request Carbon Steel Pipe — Jeddah Stock, Same-Day Dispatch

Send your material standard, grade, NPS, schedule, quantity, and MTC requirement. We confirm stock availability and provide pricing within 4 business hours. In-stock items ship same-day on orders placed before 14:00 AST.

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