ASTM A234 Butt Weld Fittings Saudi Arabia

Product Range

ASME B16.9 Butt Weld Fitting Types — What We Stock

Fitting Type	Standard	Dimensions	Radius / Variant	Common Use	GUO Stock
90° Elbow (LR)	ASME B16.9	NPS ½ – 60	1.5D centerline radius	Most Aramco process piping — standard	Ex-stock NPS ½–24
45° Elbow (LR)	ASME B16.9	NPS ½ – 60	1.0D centerline radius	Direction change with lower pressure drop	Ex-stock NPS ½–24
90° Elbow (SR)	ASME B16.28	NPS ½ – 24	1.0D centerline radius	Space-constrained areas where B16.28 permits	Ex-stock NPS 1–16
Equal Tee	ASME B16.9	NPS ½ – 60	All three outlets same size	Branch connections — full flow to branch	Ex-stock NPS ½–24
Reducing Tee	ASME B16.9	NPS ½ – 48	Branch outlet smaller than run	Stepped branch connections	Ex-stock NPS 2–20
Concentric Reducer	ASME B16.9	NPS ½ – 48	Shared centerline, both ends	Vertical pipe runs, liquid service	Ex-stock NPS 1–24
Eccentric Reducer	ASME B16.9	NPS ½ – 48	Flat side on one face (top or bottom)	Horizontal pipe runs — prevents vapor pockets	Ex-stock NPS 1–24
End Cap	ASME B16.9	NPS ½ – 48	Hemispherical or ellipsoidal head	Pipe end termination, test blinds	Ex-stock NPS ½–16

NPS 26–60 available on project order. Seamless (S) and Electric Resistance Welded (ERW/W) schedules available. Confirm with RFQ.

In Summary

ASTM A234 Grade WPB is the standard carbon steel material for ASME B16.9 factory-made butt-weld pipe fittings, covering the full range used in Saudi Aramco process piping: 90-degree and 45-degree long-radius elbows, 90-degree short-radius elbows, equal tees, reducing tees, concentric reducers, eccentric reducers, and end caps. The long-radius 90-degree elbow has a centerline radius of 1.5 times the nominal pipe size, the standard for most Aramco process lines per SAES-L-108. SAEP-347 Annex 5 defines 18 carbon steel butt-weld fitting material numbers. Gulf Union Ozone stocks the full Annex 5 range with ex-stock coverage from NPS ½ to NPS 24 in schedules from Schedule 40 to Schedule XXH (double extra heavy). For sour H₂S service, normalized A234 WPB fittings are required per NACE MR0175, with hardness not exceeding 22 HRC. All fittings ship with EN 10204 3.1 mill test certificates from the producing mill, traceable by heat number to the physical marking on each fitting, with actual chemistry and mechanical test results confirmed per ASTM A234 limits.

Material Reference

ASTM Material Grades — Carbon Steel and Alloy Butt Weld Fittings

ASTM Grade	Type	Mfg. Method	Temp Range	Aramco Application	GUO Stock
A234 WPB	Carbon steel (seamless or welded)	S, W, WX	-29°C to 427°C	General process, utility piping	Ex-stock
A234 WPC	Carbon steel, higher strength	S, W	-29°C to 427°C	Heavier wall, high-pressure utility	On order
A234 WP11	1¼Cr-½Mo alloy steel	S, W	-29°C to 593°C	High-temperature process piping	Ex-stock
A234 WP22	2¼Cr-1Mo alloy steel	S, W	-29°C to 649°C	Hydrocracker, reformer, high-temp	Ex-stock
A403 WP304L	304L stainless steel (low carbon)	S, WX	-196°C to 816°C	General corrosive service	Ex-stock
A403 WP316L	316L stainless steel (Mo-bearing)	S, WX	-196°C to 816°C	Coastal, NEOM, desalination service	Ex-stock

Mfg. method: S = Seamless; W = Electric Resistance Welded; WX = Seamless or welded. All matching ASME B16.9 and B16.28 dimensions. SMLS preferred for sour service (NACE MR0175/ISO 15156).

Saudi Aramco Procurement

SAEP-347 Annex 5 — Carbon Steel Butt Weld Fitting Material Numbers

Saudi Aramco Engineering Procedure SAEP-347 establishes approved material numbers for all procurement of piping system components. Annex 5 covers factory-made butt weld pipe fittings. Suppliers must hold approved stockist status for these material numbers. Gulf Union Ozone is an approved SAEP-347 stockist in Jeddah, Western Region. All purchase orders reference SAEP-347 material numbers, and all material trace documentation is issued per EN 10204 3.1.

SAEP-347 No.	ASTM Grade	Description	Mfg. Method	GUO Status
F-025	ASTM A234 WPB	Carbon steel seamless butt weld fittings	Seamless (S)	Approved stockist
F-026	ASTM A234 WPB	Carbon steel welded butt weld fittings	ERW / W	Approved stockist
F-028	ASTM A234 WPB	Carbon steel normalized BW fittings — sour service	Seamless (S)	Approved stockist
F-031	ASTM A234 WP11	1¼Cr-½Mo alloy butt weld fittings — high temp	Seamless (S)	Approved stockist
F-034	ASTM A234 WP22	2¼Cr-1Mo alloy butt weld fittings — hydrocracker	Seamless (S)	Approved stockist

SAEP-347 material numbers are subject to revision. Verify current Annex 5 numbers in SAEP-347 (latest revision) before purchase order issuance. Gulf Union Ozone can assist with documentation verification.

SAEP-347 Annex 5 defines 18 carbon steel butt-weld fitting material numbers for Saudi Aramco process facilities, covering the full ASME B16.9 product range. The 18 numbers are organized by fitting type and wall thickness: 90-degree long-radius elbows (Schedule 40, Schedule 80, Schedule 160/XXH), 45-degree elbows (standard and heavy wall), equal tees, reducing tees, concentric reducers, eccentric reducers, and end caps — each available in standard ASTM A234 WPB carbon steel and in ASTM A420 WPL6 low-temperature carbon steel for cold service. Sizes run from NPS ½ (DN 15) to NPS 24 (DN 600). The key procurement requirement is to state the fitting type, nominal pipe size, wall schedule, and the explicit SAEP-347 Annex 5 material number on the purchase order to ensure the correct EN 10204 3.1 mill test certificate accompanies delivery. Gulf Union Ozone stocks all 18 Annex 5 fitting types ex-Jeddah with EN 10204 3.1 documentation on every delivery.

Sour Service Requirements

NACE MR0175 Requirements for Carbon Steel Butt Weld Fittings

Saudi Aramco production and gas processing systems frequently involve wet H₂S service (sour service). NACE MR0175 / ISO 15156 defines the hardness limits and metallurgical requirements for carbon steel fittings in sour service. Non-compliant fittings can cause hydrogen-induced cracking (HIC) or sulfide stress cracking (SSC) — both lead to catastrophic failures in wet H₂S environments.

NACE MR0175 Hardness Limits

Max 22 HRC (Rockwell C-scale)
Max 250 HBW (Brinell)
All heat-affected zones must comply
Production hardness test per piece required on SAEP-347 sour service fittings

Required Processing — Sour Service

Normalized: Required for WPB fittings in sour service
PWHT: Required for WP11, WP22 alloy fittings
Seamless: Strongly preferred; ERW requires weld seam PWHT
HIC testing: NACE TM0284 per SAEP-347 Annex 5

MTC Requirements for Sour Service

EN 10204 3.1 MTC — mandatory
Chemistry certified to ASTM A234 limits
Hardness test results per piece
NACE compliance statement from mill
HIC test report (NACE TM0284) if required

NACE MR0175 (ISO 15156) compliance for carbon steel butt-weld fittings in H₂S sour service requires three verifiable conditions. First, the fitting material must be in the normalized or normalized-and-tempered condition — cold-worked or quench-and-tempered ASTM A234 WPB is not acceptable for sour service. Second, the maximum hardness anywhere in the fitting body or weld-affected zone must not exceed 22 HRC (237 HV). Third, hardness must be verified by actual Brinell or Rockwell measurement on representative samples from each heat number, not simply declared by reference to the nominal specification. For SAEP-347 applications on Aramco sour service piping systems (SAES-L-133 Category M and Category M-H₂S), the EN 10204 3.1 mill test certificate must show the actual measured hardness values. Gulf Union Ozone maintains NACE MR0175-compliant ASTM A234 WPB fittings with hardness-documented EN 10204 3.1 certificates for all sour service deliveries.

Stock & RFQ

Jeddah Stock — Butt Weld Fitting Sizes and Schedules

ASTM A234 WPB — Ex-Stock

NPS ½ to 24 — Sch STD (Sch 40), Sch XS (Sch 80), Sch 160, XXS

All elbow types, tees, reducers (conc. & ecc.), caps

Seamless (SMLS) preferred — ERW available in select sizes

ASTM A234 WP11 / WP22 — Ex-Stock

NPS 1 to 16 — Sch 40, 80, 160

90°LR, 45°LR elbows, equal tees, concentric reducers

All PWHT-certified for high-temperature service

RFQ Format — Fastest Processing

Fitting type: 90° LR Elbow / Tee / Reducer
Material: ASTM A234 WPB
ASME standard: B16.9 / B16.28
NPS (size): 6" NPS
Schedule: Sch 80 (or wall thickness)
Mfg method: Seamless
Service: Normal / Sour (H₂S)
MTC: EN 10204 3.1
SAEP-347 No.: [if known]
Quantity: 50 pieces

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FAQ

Butt Weld Fittings — Common Questions Answered

What is the difference between a 90° long radius and 90° short radius elbow?

A 90° long radius (LR) elbow per ASME B16.9 has a centerline radius of 1.5 times the nominal pipe size (1.5D). A 90° short radius (SR) elbow per ASME B16.28 has a centerline radius equal to the nominal pipe size (1.0D). Long radius elbows produce lower pressure drop (approximately 50% less than SR) and are the standard for most Saudi Aramco process piping per SAES-L-108. Short radius elbows are permitted only where space constraints make 1.5D impractical — they are not recommended for slug flow, erosive service, or high-velocity gas lines.

When should I use a concentric reducer vs an eccentric reducer?

Concentric reducers (CON) maintain a shared centerline at both ends — used on vertical pipe runs and gas service where the flow is symmetric. Eccentric reducers (ECC) have one flat face — used on horizontal liquid lines to prevent vapor pockets from forming at the reducer. On pump suction lines, SAES-L-108 specifies eccentric reducers installed with the flat side up (flat on top / FOT) to prevent cavitation by allowing any air pockets to migrate back. Gulf Union Ozone supplies both types in all standard schedules from NPS 1 to 24.

What is the difference between ASTM A234 and ASTM A403 butt weld fittings?

ASTM A234 covers wrought carbon steel and alloy steel butt weld fittings — including grades WPB (carbon steel), WPC, WP11, WP22, WP91, and low-temperature grades WPL3, WPL6. ASTM A403 covers wrought austenitic stainless steel butt weld fittings — including grades WP304, WP304L, WP316, WP316L. The selection depends on the pipe material: A234 WPB matches ASTM A106 and API 5L carbon steel pipe; A403 WP316L matches ASTM A312 TP316L stainless steel pipe. Both must be ordered to match the pipe material, wall schedule, and SAEP-347 material number for Saudi Aramco procurement.

Related Resources

Request Carbon Steel Butt Weld Fittings — Same-Day Dispatch Jeddah

Send your fitting type, material grade, ASME schedule, size, and quantity. We confirm stock and pricing within 4 business hours. Standard ASTM A234 WPB fittings in NPS ½ to 24 ship same-day on orders placed before 14:00 AST.

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Carbon Steel Butt Weld Fittings — ASTM A234 WPB / ASME B16.9 Saudi Arabia