Seamless Pipes
NKK SEAMLESS PIPES
Seamless Pipes – China Origin
- Material: Carbon Steel – Black (Galvanized on demand)
- Wall Thickness: Sch 40 Sch 80 (above on demand)
- Size Range: ½” to 12” (above on demand)
- Standards: ASTM A53, API 5L Grade B, (others on demand)
- Application: Steam, Water, Gas, Oil & Air pipelines
- Origin: China
INTERPIPE SEAMLESS PIPES
Seamless Pipes – Ukraine Origin
- Material: Carbon Steel – Black (Galvanized on demand)
- Wall Thickness: Sch 40 Sch 80 (above on demand)
- Size Range: ½” to 12” (above on demand)
- Standards: ASTM A53, API 5L Grade B, (others on demand)
- Application: Steam, Water, Gas, Oil & Air pipelines
- Origin: Ukraine
Seamless Steel Pipe Supplier in Saudi Arabia
Ajal Arabia is a Saudi Arabia–based supplier of seamless steel pipes for projects where joint integrity is non-negotiable. Our seamless carbon steel pipes — led by ASTM A106 Grade B in Schedules 40, 80, 160 and XXS — are stocked in sizes from 1/2″ to 24″ NB for MEP contractors, industrial plants, and oil & gas service companies across Riyadh, Jeddah, Dammam and the wider Kingdom. Because seamless pipe is drawn from a solid billet with no longitudinal weld, it offers uniform strength under high pressure and temperature, making it the specified choice for steam and condensate lines, fire fighting risers, high-pressure hydraulics, and process piping. We also supply seamless stainless steel pipe in grades 304, 304L, 316 and 316L for corrosive and hygienic services, alongside API 5L seamless line pipe and ASTM A333 low-temperature grades. Mill test certificates to EN 10204 3.1 are available with every supply, and our team supports consultant material submittals. For seamless pipe supply in Saudi Arabia — from single lengths to full project BOQs — send us your enquiry.
Related: compare with our ERW welded steel pipes | matching ASME B16.5 flanges | request a quotation for seamless pipe
Applications
- Fire fighting systems — black steel seamless pipe for risers, hydrant networks and sprinkler mains
- High-pressure steam and condensate lines in plants and district cooling stations
- Oil, gas and petrochemical process piping (API 5L grades)
- Hydraulic and high-pressure instrument tubing lines
- Chilled water and HVAC risers in high-rise towers
- Low-temperature services specified with ASTM A333 grades
- Corrosive and hygienic services with 304/316/316L stainless seamless pipe
Standards & Specifications
- ASTM A106 Grade B — seamless carbon steel pipe for high-temperature service
- API 5L — seamless line pipe for oil & gas transmission
- ASTM A333 — seamless pipe for low-temperature service
- ASTM A312 — seamless austenitic stainless steel pipe (TP304/304L/316/316L)
- ASME B36.10M — dimensions and weights of wrought steel pipe
- Schedules 40, 80, 160 and XXS; sizes 1/2″ to 24″ NB
- Mill test certificates to EN 10204 3.1 available with supply
Frequently Asked Questions
Q1: When should I specify seamless pipe instead of welded (ERW) pipe?
Seamless pipe has no longitudinal weld seam, so it delivers uniform strength and is preferred for high pressure, high temperature, and critical services such as steam lines, fire fighting risers, and process piping. ERW welded pipe is more economical and perfectly adequate for lower-pressure plumbing, HVAC, and drainage systems. If your specification or consultant calls out ASTM A106, seamless is mandatory.
Q2: What sizes and schedules of ASTM A106 Grade B do you stock in Saudi Arabia?
We stock seamless carbon steel pipe from 1/2″ to 24″ NB in Schedules 40, 80, 160 and XXS, with ASTM A106 Grade B as our core grade. Stainless grades 304/304L/316/316L and API 5L line pipe are also available. Share your line list and we will confirm ex-stock availability and delivery to your site.
Q3: Do you supply mill test certificates with seamless pipes?
Yes. Mill test certificates to EN 10204 3.1 are available with every supply, showing heat numbers, chemical composition, and mechanical test results. These documents are exactly what consultants require for material submittals on Saudi projects.
Q4: What is the difference between ASTM A106 and API 5L pipe?
ASTM A106 covers seamless carbon steel pipe for high-temperature service in power plants and process facilities, while API 5L covers line pipe for oil and gas transmission with its own chemistry and testing regime (including PSL levels). Tell us your service conditions and we will help you select the correct specification.
Brands We Stock: NKK, Interpipe, TMK & JASCO
Ajal Arabia stocks seamless carbon steel pipe from four brands — NKK, Interpipe, TMK, and JASCO — in the grades, sizes, and schedules Saudi MEP and industrial specifications call for.
The core of the stocked range is ASTM A106 Grade B seamless pipe, from 1/2″ to 24″ nominal bore in Schedules 40, 80, 160, and XXS — with EN 10204 3.1 mill test certificates, heat-number traceable, available with every supply for your project submittals.
When Seamless Is Specified
- Steam and condensate — high-pressure steam distribution and condensate return in plants and district cooling stations
- Fire fighting risers — where the specification calls for seamless construction on risers and hydrant networks
- Oil, gas, and process — critical services in Jubail and Yanbu plants where no weld seam is permitted
- High-pressure hydraulics and instrumentation — Sch 160/XXS small-bore lines where heavy walls are the practical route
Seamless pipe carries no longitudinal weld seam — which is precisely why specifications mandate it for high pressure, high temperature, and cyclic services. For lower-pressure plumbing, HVAC, and drainage, welded ERW pipe is more economical and perfectly adequate.
Frequently Asked Questions
What is the difference between ASTM A53 and ASTM A106 seamless pipe?
ASTM A53 covers both welded and seamless pipe for general mechanical and pressure applications at ordinary temperatures. ASTM A106 covers seamless pipe only, specifically for high-temperature service. A106 Grade B is the default seamless grade on most industrial specs in the region.
Do you supply mill test certificates with seamless pipe?
Yes. EN 10204 3.1 mill test certificates — chemical composition, mechanical properties, heat-number traceability, and hydrotest records — are available with every supply. Request them with your order so they arrive with the material.
Which schedule should I order for my service?
Schedule is a wall-thickness designation, not a pressure rating on its own — confirm the selection against the piping code calculation (ASME B31.1/B31.3/B31.9) and the project specification. Sch 40 is the everyday schedule; Sch 80/160/XXS serve progressively higher-pressure services.