Slip On Flanges to Saudi Arabia

Leading Manufacturer & Exporter of
Slip On Flanges to Saudi Arabia

Werner Flanges is a globally recognised manufacturer and exporter of slip on flanges, supplying Saudi Arabia's oil & gas, petrochemical, water infrastructure, and power generation sectors with precision-forged, ASME B16.5-compliant components for over two decades. Our slip on flanges are engineered to meet the rigorous demands of ARAMCO engineering standards, SABIC project specifications, and international procurement codes used throughout the Kingdom of Saudi Arabia.

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Slip on flanges are among the most widely used flange types in Saudi Arabia’s industrial and utility piping systems. Their ease of installation, versatility across multiple materials and pressure classes, and cost-effectiveness make them the preferred choice for low-to-medium pressure process lines, utility systems, water distribution networks, and secondary process piping within Saudi petrochemical complexes, refineries, and desalination plants. Werner Flanges maintains a deep inventory of slip on flanges in Carbon Steel (ASTM A105), Stainless Steel (304, 304L, 316, 316L, 321), Alloy Steel, Duplex (F51), and Super Duplex (F53/F55) to enable fast, reliable supply.

All Werner Flanges slip on flanges are manufactured to ASME B16.5 (NPS ½” to 24″) and ASME B16.47 (NPS 26″ to 60″), available in pressure classes from 150# to 2500#, with facing types including Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ). Full documentation — including EN 10204 3.1 Material Test Certificates, dimensional inspection reports, and NACE MR0175 compliance — is provided with every shipment to Saudi Arabia.

A slip on flange (also written as slip-on flange, abbreviated SOF or SORF) is a type of pipe flange that, as its name suggests, slips over the outside diameter of a pipe before being secured with two fillet welds — one on the inside bore and one on the outside face. This double-weld configuration provides both structural integrity and leak resistance under operating conditions.

Slip-On Flange (SOF / SORF) | Double Fillet Weld Design | Secure Pipe Fitment | Reliable Structural & Leak Resistance

Specifications

Specification	Details
Pressure Rating	Class 150 to Class 2500
Flange Type	Plate Flange
Facing Type	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Size Range	½” to 24” (DN 15 to DN 600)
Temperature Range	-29°C to +593°C (Depending on Material & Pressure Class)
Applications	Oil & Gas, Petrochemical, Power Generation, Water Treatment, Marine & Industrial Sectors
Manufacturing Process	Forged / Machined
Certification	EN 10204 3.1 / 3.2, IBR, NACE MR0175 / ISO 15156 (as applicable)

Matel and Grade

Type of Materials	Common Specifications / Customization Available on Request
Duplex Steel	ASTM/ASME A182 F51, F60, F61, UNS S31803, UNS S32205
Super Duplex Steel	ASTM/ASME A182 F53, F55, UNS S32750, UNS S32760, F44 (6Mo)
Stainless Steel	ASTM/ASME A182 F304, F304L, F316, F316L, F310, F317L, F321, F347
Carbon Steel	ASTM A105, A350 LF1, LF2, LF3, A266 Class 1/2, A694 F42 to F70, A765 Gr. II
Alloy Steel	ASTM/ASME A182 F1, F5, F9, F11, F12, F22
Non-Ferrous Alloys	Titanium, Brass, Admiralty Brass, Copper Nickel, Nickel Alloys, Hastelloy
Titanium	ASTM/ASME B381 Gr.1, Gr.2, Gr.5, Gr.7, Gr.12, Gr.16
Copper Nickel	ASTM B151 UNS C70600 (Cu-Ni 90/10), C71500 (Cu-Ni 70/30)
Brass, Al-Brass	ASTM B152 UNS C26000, C27200, C28000; ASTM B111 for Al-Brass
Nickel Alloys	ASTM B160, B161, B564 – UNS N02200, N02201, N04400, N08800, N08825, N06600, N06601, N06625, Monel K500
Alloy 20	ASTM B462 UNS N08020
Hastelloy	ASTM B564 UNS N10276 (Hastelloy C276), N06022 (Hastelloy C22)
Cladded Materials	ASTM B898, B265, B424 or custom explosion/clad bonding using dissimilar metals
Cladded Materials	Titanium-Steel, Nickel-Steel, Titanium-Copper, Stainless Steel-Carbon Steel, Bimetallic/Trimetallic Combinations

Types of Flanges

Slip On Flanges	Raised Face Slip On Flanges	Flat Face Slip On Flanges	RTJ Slip On Flanges	Forged Slip On Flanges
High Pressure Slip On Flanges	Long Slip On Flanges	Reducing Slip On Flanges	Industrial Slip On Flanges	Custom Slip On Flanges

Industries and Applications We Supply

Industry	Applications
Oil & Gas Industry	Upstream — In Saudi Aramco’s upstream operations across Ghawar, Safaniya, Khurais, Berri, and Abqaiq, slip on flanges are used extensively in low-to-medium pressure utility systems, produced water handling lines, chemical injection systems, gas gathering headers (where process class is Class 150# to 300#), and instrument air/fuel gas distribution networks. They are specified in ARAMCO’s Piping Material Classes (PMCs) for utility service categories where Class 900# and above weld neck flanges are not required. Midstream — In gas processing plants, NGL fractionation facilities, and the vast pipeline network operated by Saudi Aramco Gas Processing, slip on flanges are used for instrument connections, utility tie-ins, and secondary process connections. Carbon Steel A105 raised-face slip on flanges are standard in these applications. Downstream — In Saudi Aramco’s downstream refineries (Ras Tanura, Rabigh — PETRO Rabigh, Yanbu), as well as SATORP (Jubail) and SAMREF (Yanbu), slip on flanges are found throughout atmospheric and vacuum distillation units, hydrotreating units, and utility systems. Stainless steel 316L SOFlanges are used in wet crude and sour water stripper environments where corrosion resistance is required.
Petrochemical & Chemical Processing	Jubail Industrial City, the world’s largest industrial city, hosts SABIC affiliates including SHARQ, KEMYA, YANPET, IBN SINA, and Saudi Kayan, along with SADARA Chemical Company — the world’s largest chemical complex built in a single phase. These facilities use vast quantities of slip on flanges in low-to-medium pressure chemical process lines, cooling water systems, service water distribution, plant air networks, nitrogen purge lines, and utility headers. Werner Flanges supplies SABIC-compliant material grades with full EN 10204 3.2 (third-party witnessed) documentation for these projects. Stainless steel F304L and F316L slip on flanges are specified for mild acid service, caustic soda lines, and chemical storage tank connections. Carbon Steel A105 slip on flanges are used in utility services and low-pressure hydrocarbon lines throughout these complexes.
Power Generation	Saudi Electricity Company (SEC) operates gas-fired and oil-fired power plants across the Kingdom, with new combined-cycle gas turbine (CCGT) plants being commissioned regularly. Slip on flanges in Carbon Steel A105 and Alloy Steel F11/F22 are used in cooling water systems, auxiliary steam systems, and low-pressure utility lines at these facilities. F321 and F316L slip on flanges are used in demineralised water and condensate return systems where stainless grades are required.
Water Treatment	Saudi Arabia is the world’s largest producer of desalinated water, with Saline Water Conversion Corporation (SWCC) and ACWA Power operating massive MSF and RO desalination plants along both the Arabian Gulf and Red Sea coasts. Slip on flanges in Duplex F51 and Super Duplex F53/F55 are specified for seawater intake systems, heat exchanger connections, and brine discharge lines where extreme chloride concentrations and elevated temperatures would cause rapid pitting corrosion in standard stainless grades. F316L SOFlanges are used in lower-chloride, lower-temperature sections of these plants.

Frequently Asked Questions (FAQs)

Q1. What is the difference between a slip on flange and a weld neck flange?: A slip on flange slides over the pipe OD and is secured with two fillet welds; it is easier and faster to install. A weld neck flange uses a single full-penetration butt weld and provides superior strength and fatigue resistance at very high pressures. Slip on flanges are preferred for Class 150# to 600# utility and secondary process service; weld neck flanges are specified for Class 900# and above, or for cyclic, high-fatigue, or sour service applications per ARAMCO engineering standards.
Q2. Are Werner Flanges slip on flanges accepted on Saudi ARAMCO projects?: Yes. Werner Flanges manufactures slip on flanges to ASME B16.5 with full SAES-A-301-compliant material certification and SAES-L-009-compliant flange selection documentation. Our MTCs, PMI reports, and inspection documentation are accepted by ARAMCO-approved EPC contractors including Saipem, Petrofac, Tecnicas Reunidas, and Samsung E&A. For projects requiring ARAMCO Approved Vendor List (AVL) products, we provide full vendor documentation packages for review by the project quality team.
Q3. What material should I specify for slip on flanges in a desalination plant in Saudi Arabia?: For seawater service, Duplex F51 (UNS S32205) or Super Duplex F53/F55 (UNS S32750/S32760) are the standard specifications, depending on chloride concentration, temperature, and flow velocity. For low-chloride treated water or condensate service, 316L is typically adequate. For brine at temperatures above 80°C, super duplex is generally required. Werner Flanges’ technical team can review your service conditions and recommend the optimum material grade.
Q4. Can you supply slip on flanges to ASME B16.47 for large-bore pipelines?: Yes. Werner Flanges manufactures large-bore slip on flanges to ASME B16.47 Series A (MSS SP-44) and Series B (API 605) from NPS 26″ to NPS 60″. These are available in Class 150# to 900# in Carbon Steel, Stainless Steel, and Alloy Steel. Lead time for large-bore flanges is typically 6–10 weeks from order confirmation. Please contact our technical team for specific size and class availability.
Q5. Do you provide NACE MR0175-compliant slip on flanges for sour gas service?: Yes. Werner Flanges supplies NACE MR0175/ISO 15156-compliant Carbon Steel A105 slip on flanges with hardness ≤ 22 HRC (187 HBW), confirmed by individual piece hardness testing. For sour service, HIC (Hydrogen Induced Cracking) testing per NACE TM0284 and SSC (Sulfide Stress Cracking) testing per NACE TM0177 are available on request. All sour service flanges are supplied with full NACE compliance documentation.
Q6. What is the typical lead time for slip on flanges delivered to Jubail?: For standard sizes and grades from stock (C/S A105, SS 316L, Class 150# to 300#), shipment is within 3–5 business days. For manufactured-to-order items, production lead time is 3–5 weeks depending on material and pressure class. Sea freight transit from our facility to King Fahd Industrial Port, Jubail is 18–21 days. Total delivery time for manufactured items to Jubail is typically 5–7 weeks. Air freight options can reduce total delivery to 4–5 weeks for manufactured items.
Q7. Can you supply custom-size slip on flanges with non-standard bore diameters?: Yes. Werner Flanges has an in-house custom engineering capability to manufacture slip on flanges with non-standard bore diameters, special facing configurations, custom pressure classes, or reduced-bore orifice-type faces. Custom items have a minimum lead time of 3–5 weeks from drawing approval. Please submit your dimensional drawing and material specification for a quotation from our custom engineering team.

GET A QUOTE

Get Your Slip On Flanges Quote from Saudi Arabia

Werner Flanges responds to all enquiries from Saudi Arabia within 2–4 business hours during working days. For ARAMCO-project or time-critical requirements, please indicate your urgency and we will prioritise your enquiry accordingly.

To receive a precise quotation, please provide the following information:

Flange type: Slip On, Raised Face (SORF) / Flat Face (SOFF) / Ring Type Joint (RTJ)
Size: NPS (Nominal Pipe Size) and pipe schedule (e.g., NPS 4″, SCH 40)
Pressure class: 150#, 300#, 600#, etc.
Material / Grade: e.g., Carbon Steel A105, Stainless Steel 316L, Duplex F51
Facing type and surface finish requirement
Quantity and required delivery date
Delivery destination: City and port in Saudi Arabia
Special requirements: NACE service, sour gas (H₂S), third-party inspection, ARAMCO documentation package, SABER certification
Project name and PO number (if applicable)

Email: sales@wernerflanges.com