ASTM A105 · ASME B16.11 · SAEP-347 · Saudi Arabia

Forged Steel Fittings Saudi Arabia — ASTM A105 Socket Weld & Threaded, SAEP-347 Compatible

Gulf Union Ozone stocks ASTM A105 forged carbon steel fittings to ASME B16.11 — socket weld and threaded types — in Class 3000# and 6000# pressure ratings, NPS ½″ to 4″. Preferred for Aramco small-bore process piping (NPS ½″–2″) per SAES-L-135. EN 10204 Type 3.1 Mill Test Certificates. SAEP-347 compatible material numbers. Same-day dispatch from Jeddah.

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ASTM A105 forged steel pipe fittings socket weld threaded — Gulf Union Ozone Jeddah Saudi Arabia
StandardASME B16.11
MaterialASTM A105 Forged CS
Pressure Classes3000# · 6000# (SW); 2000# · 3000# · 6000# (Threaded)
Size RangeNPS ½″ to 4″
DocsEN 10204 3.1 MTCs
Material Specification

ASTM A105 Forged Carbon Steel — Material Properties

ASTM A105 is the standard specification for carbon steel forgings for ambient- and higher-temperature service in pressure piping systems and pressure vessel fabrication. All Gulf Union Ozone A105 forged fittings are manufactured and tested to the current ASTM A105/A105M edition, with actual chemical composition and mechanical test results on every EN 10204 Type 3.1 MTC.

Chemical Composition (ASTM A105 — max unless range given)

Element Limit
Carbon (C)0.35% max
Manganese (Mn)0.60 – 1.05%
Phosphorus (P)0.035% max
Sulfur (S)0.040% max
Silicon (Si)0.10 – 0.35%
Copper (Cu)0.40% max
Nickel (Ni)0.40% max
Chromium (Cr)0.30% max
Molybdenum (Mo)0.12% max
Vanadium (V)0.08% max

Mechanical Properties (ASTM A105)

Property Value
Tensile Strength485 MPa min
Yield Strength250 MPa min
Elongation (2 in.)22% min
Reduction of Area30% min
Hardness187 HBW max
NACE MR0175 Limit237 HBW (22 HRC)
Temperature Range−29°C to 538°C
NACE MR0175 Compliant

Standard ASTM A105 hardness (187 HBW max) is within the NACE MR0175 / ISO 15156 limit of 237 HBW (22 HRC) — applicable to socket weld fittings. Threaded fittings require additional verification per SAES-L-133 for H₂S service.

Stock Range

Forged Steel Fitting Types — Socket Weld & Threaded

Socket Weld (SW) — ASME B16.11
Pressure Classes: 3000#, 6000# Size: NPS ½″ to 4″
Fitting Type 3000# 6000#
90° Elbow●●
45° Elbow●●
Equal Tee●●
Reducing Tee●●
Full Coupling●●
Half Coupling●●
Cap●●
Union●○ req
Threaded (NPT / BSP) — ASME B16.11
Pressure Classes: 2000#, 3000#, 6000# Size: NPS ½″ to 4″
Fitting Type 2000# 3000# 6000#
90° Elbow●●●
45° Elbow●●●
Equal Tee●●●
Reducing Tee●●●
Full Coupling●●●
Half Coupling●●●
Hex Plug●●●
Hex Nipple●●●
Cap●●●
Bushing●●○ req
When to Use Which

Socket Weld vs Threaded vs Butt Weld — Aramco Specification Guidance

Saudi Aramco SAES-L-135 and the applicable piping class determine which fitting connection type is required for each service. Use this table to select the correct type for your application.

Attribute Socket Weld Threaded Butt Weld
Size Range NPS ½″ – 2″ (to 4″ max) NPS ½″ – 4″ NPS ½″ – 24″+
Standard ASME B16.11 ASME B16.11 ASME B16.9
Pressure Class 3000# / 6000# 2000# / 3000# / 6000# Schedule-based
Joint Type Fillet weld at hub (no full penetration) Mechanical thread; sealant/tape required Full penetration weld (ASME Sec IX)
Sour Service Permitted (NACE MR0175) Not permitted per SAES-L-133 Permitted (NACE MR0175)
Aramco Small-Bore Preferred (SAES-L-135) Utility / instrument lines only Larger bore (NPS 2″+)
Disassembly Not possible (permanent weld) Possible (maintenance access) Not possible (permanent weld)
SAEP-347 Compliance & RFQ

ASTM A105 Forged Fittings for Saudi Aramco Projects

Gulf Union Ozone supplies ASTM A105 forged steel fittings compatible with SAEP-347 Annex 4 material numbers. Every shipment includes: (1) EN 10204 Type 3.1 MTC from the originating forge, with actual chemical composition and mechanical results; (2) Certificate of Conformance referencing the SAEP-347 material number; (3) heat number cross-reference report for Aramco Goods Receipt inspection.

Aramco Small-Bore Piping — When Socket Weld Is Specified

  • SAES-L-135 specifies socket weld for small-bore (NPS ½″–2″) process piping at ASME Class 600 and above
  • Socket weld eliminates threaded connection leakage risk in high-pressure, high-temperature hydrocarbon service
  • For sour service, threaded connections are prohibited per SAES-L-133; socket weld or butt weld required
RFQ Information Required
  1. Fitting type — socket weld or threaded
  2. Fitting shape — elbow, tee, coupling, cap, etc.
  3. Pressure class — 2000#, 3000#, or 6000#
  4. Size — NPS (e.g. ¾″, 1½″, 2″)
  5. Thread standard — NPT (ASME B1.20.1) or BSP (ISO 7)
  6. SAEP-347 material number (if Aramco project)
  7. Sour service? Y/N — specify H₂S partial pressure if yes
  8. Quantity and required delivery date / destination
Frequently Asked Questions

Forged Steel Fittings — FAQ

What is the difference between socket weld and threaded fittings for Aramco small-bore piping?

Socket weld fittings (ASME B16.11) are fillet-welded at the hub — used in NPS ½″–2″ process lines requiring a stronger, more leak-tight joint than threading. SAES-L-135 specifies socket weld for small-bore process piping at Class 600+. Threaded fittings are for utility piping and instrument connections where disassembly is needed. For sour service, threaded connections are not permitted per SAES-L-133.

Are ASTM A105 forged steel fittings compatible with Saudi Aramco SAEP-347?

Yes. ASTM A105 forged fittings to ASME B16.11 appear in SAEP-347 Annex 4. Gulf Union Ozone supplies with EN 10204 Type 3.1 MTCs and a Certificate of Conformance referencing the SAEP-347 material number — meeting Aramco Goods Receipt inspection requirements.

Can ASTM A105 forged fittings be used in sour service?

ASTM A105 socket weld fittings can be used in sour service per NACE MR0175 (hardness 187 HBW max is within the 237 HBW NACE limit). However, threaded A105 fittings are not permitted in sour service under SAES-L-133 due to stress corrosion cracking risk in thread crevices. NACE compliance must be confirmed per heat and documented in the EN 10204 3.1 MTC.

Related Resources

Further Reading

Hub Page
Pipe Fittings — Full Range
Butt weld, socket weld, threaded fittings — 36 SAEP-347 material numbers in stock Jeddah.
Reference List
SAEP-347 Material Numbers
Full list of 59+ SAEP-347 Annex 4 approved material numbers for Aramco piping procurement.
Product Page
Sour Service Materials — NACE MR0175
NACE MR0175/ISO 15156 compliant valves, fittings, and pipe for H₂S service.
Product Page
ASTM A105 Flanges — Class 150–2500
Same ASTM A105 material in weld neck, blind, slip-on, socket weld, and threaded flanges.
Related Product
Carbon Steel Butt-Weld Fittings
ASME B16.9 butt-weld elbows, tees, and reducers in ASTM A234 WPB — the large-bore complement to A105 forged fittings.
✓ISO 9001:2015 Certified
✓CR 4030570569 — Saudi Arabia
✓SAEP-347 Approved Stockist
✓EN 10204 3.1 MTCs on Every Order
✓Same-Day Dispatch from Jeddah