FLANGE RANGE · 01
Weld Neck Flanges
The high-integrity choice for severe, high-pressure, high-temperature and cyclic service, with the bore matched to the pipe wall.
ASME B16.5B16.47Class 150–2500
PRODUCTS · FLANGES · SUPPLIER & STOCKIST · UAE
Supplying High-Integrity Flanges to the Oil, Gas & EPC Industries
Gasify Middle East supplies weld neck, slip-on, blind, socket weld, threaded and lap joint flanges, orifice flanges, spectacle blinds and large-diameter flanges from Abu Dhabi and Dubai. Carbon steel, low-temperature, alloy, stainless, duplex and nickel alloy flanges to ASME, MSS, ASTM and EN standards, supplied against your MTO, datasheet or piping class with material test certificates and traceability.
Built for project procurement: we match each flange to the pipe grade, class and facing, confirm sources against your project requirements, and support ADNOC, Saudi Aramco and other client-specification enquiries across the UAE, GCC, Middle East, Africa and South Asia.
ASME B16.5ASME B16.47ASME
B16.36ASTM A105ASTM A350 LF2ASTM A182EN 1092-1EN 10204
3.1
01 / FLANGE RANGE
Comprehensive Flange Inventory
From weld neck flanges for severe service to orifice flanges, spectacle blinds and large-diameter flanges, sourced against grade, standard, class and project specification.
FLANGE RANGE · 01
FLANGE RANGE · 02
Slip-On Flanges
Lower-cost flanges for moderate-pressure process, water and utility lines, welded inside and outside the hub.
ASME B16.5Class 150–600RF / FF
FLANGE RANGE · 03
Blind Flanges
Closures for line ends, vessel openings, nozzles and future tie-ins, in all pressure classes and facings.
ASME B16.5Class 150–2500RTJ
FLANGE RANGE · 04Socket Weld & Threaded Flanges
Small-bore flanges. Socket weld flanges for high-pressure small lines, threaded flanges where welding is not allowed.
Socket weldThreaded NPTNPS ½–3
FLANGE RANGE · 05Lap Joint Flanges & Stub Ends
Loose flanges used with stub ends for easy bolt-hole alignment and cost savings on alloy lines.
Lap jointStub endMSS SP-43
FLANGE RANGE · 06
Orifice Flanges
Flanges with tapped pressure connections for flow measurement, supplied as pairs with jack screws on request.
ASME B16.36Class 300–2500Pairs
FLANGE RANGE · 07Spectacle Blinds, Spades & Spacers
Line blanks for positive isolation during maintenance and shutdowns, supplied as figure-8 blinds, paddle blanks and spacers.
ASME B16.48Figure 8Spade / spacer
FLANGE RANGE · 08Stainless, Duplex & Alloy Flanges
Austenitic stainless, duplex, super duplex, low-temperature, chrome-moly and nickel alloy flanges for demanding service.
A182 F316LA182 F51B564 625
02 / SPECIFICATIONS
Flange Specifications & Data Sheets
Typical supply ranges. Availability depends on type, size, class, grade and quantity, and is confirmed for every RFQ.
| Product | Standard | Material grades | Class & size | Typical use |
|---|---|---|---|---|
| Weld neck (WN) | ASME B16.5 | A105, A350 LF2, A182 F11/F22/F91, F304/F316, F51/F53 | Class 150 to 2500; NPS ½ to 24 | Severe, high-pressure, high-temperature and cyclic service |
| Long weld neck (LWN) | ASME B16.5 dimensions; manufacturer neck length | A105, A350 LF2, A182 grades | Class 150 to 2500; NPS ½ to 24 | Vessel and column nozzles, extended necks |
| Slip-on (SO) | ASME B16.5 | A105, A350 LF2, A182 F304/F316 | Class 150 to 600 typical; limits apply at higher classes | Moderate-pressure process, water and utility lines |
| Blind (BL) | ASME B16.5 | A105, A350 LF2, A182 grades | Class 150 to 2500; NPS ½ to 24 | Line ends, vessel openings and spare nozzles |
| Socket weld (SW) | ASME B16.5 | A105, A350 LF2, A182 F304/F316 | Class 150 to 1500; NPS ½ to 3 (size limits vary by class) | High-pressure small-bore piping |
| Threaded (TH) | ASME B16.5; ASME B1.20.1 (NPT) | A105, A182 F304/F316 | Class 150 to 2500; limited sizes at higher classes | Non-welded connections, utility and instrument lines |
| Lap joint (LJ) | ASME B16.5 | A105, A182 F304/F316 (stub end in the pipe grade) | Class 150 to 2500; NPS ½ to 24 | Systems needing frequent dismantling or easy alignment |
| Reducing flange | ASME B16.5; manufacturer standard | A105, A182 grades | As per size and class | Direct size change without a separate reducer |
State facing (RF, FF, RTJ), bore or pipe schedule, flange material, sour-service and low-temperature requirements in the RFQ. Size limits vary by flange type and class in ASME B16.5.
| Product | Standard | Material grades | Class & size | Typical use |
|---|---|---|---|---|
| Large-diameter flange, Series A | ASME B16.47 Series A (MSS SP-44) | A105, A350 LF2, A694 F52–F70, A182 grades | Class 150 to 900; NPS 26 to 60 | Pipelines, tank and large process piping |
| Large-diameter flange, Series B | ASME B16.47 Series B (API 605) | A105, A350 LF2, A182 grades | Class 75 to 900; NPS 26 to 60 | Compact large-diameter flanged joints |
| Orifice flange pair | ASME B16.36 | A105, A350 LF2, A182 grades | Class 300 to 2500; NPS 1 to 24 | Flow measurement with pressure taps |
| Spectacle blind, spade and spacer | ASME B16.48 | A105, A516 Gr 70, A240 / A182 grades | Class 150 to 2500; NPS ½ to 24 | Positive isolation for maintenance and shutdowns |
| Pipeline flange, high-yield | ASTM A694; MSS SP-44 | A694 F42, F52, F60, F65, F70 | Class 150 to 900 | Flanges matching API 5L X52 to X70 line pipe |
| Integral and nozzle forgings | Drawing / vessel code | A105, A350, A182 grades | As per drawing | Forged vessel nozzles and special items on enquiry |
B16.47 Series A and Series B flanges do not mate with each other. Confirm the series, and the mating flange or equipment connection, before ordering.
| Product | Standard | Material grades | PN & size | Typical use |
|---|---|---|---|---|
| Plate flange, Type 01 | EN 1092-1 | P250GH, S235JRG2; 1.4301, 1.4404 | PN 6 to PN 40; DN 10 to 2000 | Low-pressure water and utility lines |
| Weld neck flange, Type 11 | EN 1092-1 | P250GH, 1.0460; 1.4301/1.4404/1.4571; 1.4462 duplex | PN 6 to PN 400; DN 10 to 2000 | High-integrity flanged joints on EN-specified projects |
| Hubbed slip-on, Type 12 | EN 1092-1 | P250GH; 1.4301, 1.4404 | PN 6 to PN 100 | Moderate-pressure process lines |
| Blind flange, Type 05 | EN 1092-1 | P250GH; 1.4301, 1.4404 | PN 6 to PN 400 | Line ends and closures |
| Loose flange and weld-on collar | EN 1092-1 (Types 02, 32–36) | P250GH; stainless collars | PN 6 to PN 40 | Alignment-friendly joints, stainless lines |
| Flange facings, European | EN 1092-1 Types A, B, C, D, E, F | As per body material | Per PN rating | Type B1/B2 (raised face) is the usual process facing |
EN and ASME flanges are not interchangeable. Confirm the system standard of the pipe, gasket and bolting before ordering.
| Facing | Description | Class / finish | Typical use |
|---|---|---|---|
| Raised face (RF) | 2 mm height on Class 150 and 300; 7 mm on Class 400 and above (when not omitted) | Serrated finish, 125 to 250 µin AARH | Most common facing for process piping |
| Flat face (FF) | Full flat gasket surface | Class 150, mating with cast iron or FRP flanges | Water, utilities and equipment with flat-face flanges |
| Ring type joint (RTJ) | Machined groove for an oval or octagonal metal ring (R, RX, BX) | Typically Class 600 and above, optional on lower classes | High-pressure, high-temperature hydrocarbon service |
| Tongue and groove (T&G) | Matching raised tongue and recessed groove | Class 150 to 2500 | Positive gasket retention, heat exchangers |
| Male and female (M&F) | Matching raised male face and recessed female face | Class 150 to 2500 | Gasket confinement, heat exchangers and pumps |
The gasket and the flange finish must agree. Spiral wound gaskets, ring joints and sheet gaskets each need a specific surface finish.
| Item | Standard | Grades / types | Notes |
|---|---|---|---|
| Spiral wound gasket | ASME B16.20 | 304/316 winding with graphite or PTFE filler; inner and outer rings as required | Standard process gasket for RF flanges |
| Ring type joint gasket | ASME B16.20; API 6A (BX) | Soft iron, low carbon steel, 4-6Cr ½Mo, 304/316; oval, octagonal, RX and BX | RTJ flanges in high-pressure service |
| Sheet and flat gaskets | ASME B16.21 | Compressed fibre, graphite, PTFE; ring and full face | Flat-face and low-pressure joints |
| Insulation gasket kits | Manufacturer standard | G10 or G11 sleeves, washers and gasket | Isolation of cathodic protection and electrical continuity |
| Stud bolts | ASTM A193 | B7, B7M (sour), B8/B8M, B16 (high temp), L7/L7M (low temp) | Grade follows flange material and service |
| Hex nuts | ASTM A194 | 2H, 2HM, 8/8M, 4 and 7 | Coating: PTFE, zinc or hot-dip galvanised |
Gasket and bolting grades follow the piping class. Tightening procedures follow ASME PCC-1 or the client procedure.
Working pressure at ambient temperature (38 °C) per ASME B16.5 standard class. Ratings fall as temperature rises, and other material groups differ, so always confirm against the B16.5 tables for the actual material and design temperature.
| Item | Options | Notes | ||
|---|---|---|---|---|
| Size range | ASME B16.5: NPS ½ to 24. ASME B16.47: NPS 26 to 60. EN 1092-1: DN 10 to 2000 | Availability by type, class and material is confirmed per RFQ | ||
| Pressure class | ASME Class 150, 300, 400, 600, 900, 1500, 2500; EN PN 6 to PN 400 | Ratings per ASME B16.5 for the material group and temperature | ||
| Bore and wall | Weld neck bore matched to the pipe schedule (STD, XS, SCH 40, 80, 160 and others) | State the pipe wall thickness in the RFQ | ||
| Facing and finish | RF, FF, RTJ, T&G, M&F; serrated 125–250 µin AARH or smooth finish | Spiral wound gaskets need the finish specified by the gasket supplier | ||
| Heat treatment | Normalised, quenched and tempered, or solution annealed per the material specification | Records and heat numbers appear on the MTC | ||
| Marking | MSS SP-25: manufacturer, size, class, material grade, heat number | Additional client marking on request | ||
| Surface and protection | Black paint, varnish, rust-preventive oil, pickled and passivated (stainless) | Coating follows the project specification | ||
| Packing | Wooden cases or pallets, face protectors, VCI wrap on request | Export packing to suit destination and storage period | ||
03 / MATERIALS & PIPE MATCHING
Pipe-to-Flange Specification Matching
Flange grade, class and bore must agree with the connecting pipe and the project piping class.
Material families and standards
| Material family | Forged flange (ASTM) | Typical service |
|---|---|---|
| Carbon steel | A105 | General hydrocarbon, steam and utilities (typically −29 to 425 °C) |
| Low-temperature carbon steel | A350 LF2, LF3 | Impact-tested service to −46 °C (LF3 for lower) |
| Pipeline high-yield steel | A694 F42 to F70 | Flanges for API 5L pipelines |
| Chrome-moly alloy steel | A182 F5, F9, F11, F22, F91 | High-temperature steam, refinery and power |
| Austenitic stainless | A182 F304/304L, F316/316L, F321, F347 | Corrosive, cryogenic and hygienic service |
| Duplex and super duplex | A182 F51, F53, F55 | Seawater, chloride and offshore service |
| Nickel and high alloys | B564 Alloy 625, 825, 400, 600 | Severe corrosion, acid and sour service |
Pipe-to-flange grade matching
| Pipe grade | Typical matching flange | Notes |
|---|---|---|
| A106 Gr B / A53 / API 5L Gr B | A105 | Standard carbon steel pairing |
| API 5L X52 / X60 / X65 / X70 | A694 F52 / F60 / F65 / F70 | Higher-yield flanges to match line pipe strength |
| A333 Gr 6 | A350 LF2 | Impact tested at the stated design temperature |
| A335 P11 / P22 / P91 | A182 F11 / F22 / F91 | Same chrome-moly family; heat treatment to specification |
| A312 TP304/304L, TP316/316L | A182 F304/304L, F316/316L | Match the L-grade for welded corrosive service |
| A790 S31803/S32205, S32750 | A182 F51 / F53 (A182 F55 for S32760) | Match UNS number and PREN to the pipe |
| Alloy 625 / 825 pipe | B564 Alloy 625 / 825 | Matching filler metal and the same UNS |
These are common pairings only. The piping material specification and the project datasheet decide the final grade, class, facing and bore.
04 / FLANGE SELECTION GUIDE
Flanges Aligned with Every Point in Your Piping System
A quick reference for common piping needs. Final selection follows the piping class and project specification.
| Piping need | Flange | Typical class | Standard | Notes |
|---|---|---|---|---|
| High pressure, high temperature or cyclic service | Weld neck | Class 300 and above | B16.5, B16.47 | Smooth stress transition through the tapered hub, with a bore matching the pipe |
| Low-pressure utility, water or air | Slip-on | Class 150 to 300 | B16.5 | Lower cost and easier fit-up, lower fatigue strength than weld neck |
| End of line or vessel opening | Blind flange | All classes | B16.5, B16.47 | Check pressure and temperature on the blind thickness |
| Small-bore high-pressure line | Socket weld flange | Class 600 to 1500 | B16.5 | Not recommended for severe or crevice-corrosion service |
| No welding allowed or low-pressure utility | Threaded flange | Class 150 to 600 | B16.5, B1.20.1 | Leak risk under thermal cycling, avoid in cyclic or hydrocarbon service |
| Alloy line with frequent dismantling | Lap joint flange and stub end | Class 150 to 600 | B16.5, MSS SP-43 | Allows bolt-hole rotation and uses carbon steel for the loose flange |
| Flow measurement | Orifice flange pair | Class 300 to 2500 | B16.36 | Tap orientation and jack screws specified in the RFQ |
| Positive isolation during maintenance | Spectacle blind, spade or spacer | All classes | B16.48 | Figure-8 stays on the line, spades are stored separately |
| High-pressure hydrocarbon service | Weld neck with RTJ face | Class 600 and above | B16.5, B16.20 | Metal ring seals through bolt load, check the groove and ring type |
| European project specification | EN 1092-1 Type 11 | PN 16 to PN 100 | EN 1092-1 | Match gasket, bolting and pipe standard to the EN system |
05 / MINIMUM FLANGE CLASS SELECTOR
Calculate the minimum allowable flange class
A quick check for carbon steel (A105, Group 1.1) flanges. Enter the design pressure and temperature to see the minimum class that covers them.
Material: ASTM A105 / A216 WCB (Group 1.1)
Source: ASME B16.5 Table 2-1.1 (bar)
Rating used: next listed temperature at or above the design temperature
Source: ASME B16.5 Table 2-1.1 (bar)
Rating used: next listed temperature at or above the design temperature
MINIMUM FLANGE CLASS—
RATED PRESSURE AT DESIGN TEMPERATURE0.0barg
MARGIN OVER DESIGN PRESSURE0%
RATING AT AMBIENT (38 °C)0.0barg
A first-pass check only. Other material groups, corrosion allowance, hydrotest, external loads and the project piping class can require a higher class. Confirm against ASME B16.5 and your piping material specification. Send the flange list for a quotation →
06 / ADNOC & SAUDI ARAMCO PROJECT SUPPLY
Flanges compliant with ADNOC and Aramco specifications
Major NOC and EPC projects define the flange grade, facing, testing and vendor requirements. We work to those documents.
From MTO to a compliant quotation.
Before quoting, we check the enquiry against the documents that drive flange compliance on NOC-linked projects.
- Piping material specification (PMS) and pipe class review, including flange class, facing and bore
- Material requisition, MTO and datasheet review
- Client and company specification requirements, including ADNOC and Saudi Aramco documents where the project calls for them
- Approved manufacturer or vendor list (AVL) requirements for the proposed source
- Gasket, bolting, sour service, low-temperature and special testing clauses
Traceability that travels with the flange.
Documentation follows the purchase order and the project specification, with clear heat-number traceability.
- EN 10204 3.1 material test certificates, and 3.2 where specified
- Third-party inspection coordination where the project requires it
- PMI, NDE, impact test, hardness and heat treatment records as specified
- Inspection release, packing list and shipping documents
- Project document pack compiled for the client's records
Important: Gasify supports procurement against ADNOC, Saudi Aramco
and other client specifications. Product compliance, approved-source requirements and documentation are
reviewed for each project, and Gasify does not represent an approval or vendor-registration status.
07 / STANDARDS & CODES
The standards behind every flange order.
B16.5
Pipe flanges and flanged fittings, NPS ½ to 24, Class 150 to 2500.
B16.47 Series A / B
NPS 26 to 60 flanges (MSS SP-44 and API 605).
B16.36 · B16.48
Orifice flanges, line blanks, spades and spacers.
B16.20 · B16.21
Metallic and spiral wound gaskets, and non-metallic flat gaskets.
PCC-1 · B18.2.1
Bolted flange assembly guidelines and hex bolt dimensions.
SP-44 · SP-6 · SP-9 · SP-25
Steel pipeline flanges, facing finishes, spot facing and marking.
A105 · A350 · A182 · A694
Forged carbon, low-temperature, alloy and high-yield flanges.
A193 · A194
Stud bolt and nut material specifications.
EN 1092-1 · EN 1759-1
European and US-class-in-EN flange standards.
ASME B31.3 · B31.1 · B31.4 · B31.8
Process, power, liquid and gas piping codes that drive flange selection.
NACE MR0175 / ISO 15156
Hardness limits and material requirements for H₂S service.
EN 10204 3.1 · 3.2
Inspection certificates for material test and third-party supply.
08 / TESTING & DOCUMENTATION
Testing and certification, defined before the order.
Tests and documents depend on the product standard, purchase order and applicable project specification.
Chemical & mechanical tests
Heat analysis, tensile, yield, elongation and hardness as required by the material specification.
Impact testing
Charpy V-notch testing for A350 LF2 and other low-temperature grades at the stated design temperature.
Dimensional inspection
Facing, bolt circle, bolt-hole size, thickness, hub and bore checked against ASME B16.5, B16.47 or EN 1092-1.
Hardness & sour service
Hardness testing and NACE MR0175 / ISO 15156 compliance where the specification requires sour-service material.
PMI, NDE & corrosion tests
PMI, ultrasonic, magnetic particle or liquid penetrant examination, and ASTM A262 or ferrite tests for stainless and duplex grades where specified.
MTC, traceability & TPI
EN 10204 3.1 certificates with heat numbers, heat treatment records and third-party inspection coordination.
09 / APPLICATIONS
Built for the lines that keep modern industry running.
Upstream oil & gas
Wellsite, manifold and flowline flanges, including RTJ facings.
Midstream pipelines
A694 and B16.47 pipeline flanges matching API 5L line pipe.
Refining & petrochemical
Weld neck, blind and orifice flanges in process and alloy piping.
Power generation
A182 F11, F22 and F91 flanges for boiler and steam piping.
Water & desalination
Stainless and duplex flanges for seawater, brine and treated water.
Offshore & marine
Firewater, seawater and process flanges for platforms and vessels.
Equipment & vessel nozzles
Long weld neck and blind flanges for vessels, columns and exchangers.
Fabrication & shutdown
Flanges, gaskets and bolting for spool fabrication and turnaround.
10 / WHY GASIFY
lange supply engineered as an end-to-end procurement partnership
- Quotation against a type and size list, with facing and bore left to the buyer
- Flange bore, class or facing mismatch found at site
- Flanges, gaskets, bolting and pipes quoted separately
- Approved-source requirements discovered late in the process
- MTO and pipe class reviewed, with flange grade, class, facing and bore matched before quotation
- MTC, traceability and TPI requirements aligned with the order
- Flanges, gaskets, bolting, pipes, fittings and valves consolidated in one package
- AVL and vendor requirements checked at quotation stage
11 / FLANGE SUPPLIER IN THE UAE
Flange supplier and stockist in Abu Dhabi and Dubai.
Gasify Middle East Trading LLC is a UAE-based industrial supplier and stockist of ASME and EN flanges in carbon steel, low-temperature steel, alloy steel, stainless steel, duplex and nickel alloy. From offices in Abu Dhabi and Dubai we support EPC contractors, fabricators, plant procurement teams and project owners in oil and gas, petrochemical, refining, power generation, water and infrastructure.
Our flange range covers weld neck, slip-on, blind, socket weld, threaded and lap joint flanges to ASME B16.5, large-diameter flanges to ASME B16.47, orifice flanges to ASME B16.36, line blanks to ASME B16.48 and European flanges to EN 1092-1. We source the sizes, classes, facings and bores your piping material class requires, matched to the connecting pipe.
ADNOC flange supplier and Saudi Aramco flange supplier support
Projects in the UAE, Saudi Arabia and the wider GCC often reference ADNOC or Saudi Aramco specifications, approved manufacturer lists and inspection requirements. Gasify reviews these requirements against the flanges you need, coordinates the documentation and inspection called for by the order, and supports the RFQ from technical clarification to delivery. Approval status is never assumed. Requirements are confirmed against each project's documents.
Weld neck, slip-on and blind flanges
Carbon steel flanges are supplied in ASTM A105, low-temperature flanges in A350 LF2, chrome-moly flanges in A182 F11, F22 and F91, and pipeline flanges in A694 F52 to F70. Weld neck flanges suit severe and cyclic service, slip-on flanges suit moderate-pressure utility lines, and blind flanges close line ends and vessel nozzles in all pressure classes from Class 150 to Class 2500.
RTJ, raised face and flat face flanges
Flanges are supplied with raised face, flat face, ring type joint, tongue and groove, or male and female facings. RTJ flanges are supplied with the correct ring groove for R, RX or BX rings, and raised face flanges with the serrated finish required by spiral wound gaskets.
Stainless steel, duplex and alloy flanges supplier
For corrosive and chloride service we source stainless steel flanges in A182 F304/304L and F316/316L, duplex and super duplex flanges in A182 F51, F53 and F55, and nickel alloy flanges in B564 against your project material requirements.
Orifice flanges, spectacle blinds and large-diameter flanges
Orifice flange pairs to ASME B16.36, spectacle blinds, spades and spacers to ASME B16.48, and large-diameter flanges to ASME B16.47 Series A and B are sourced against your datasheet and mating equipment connection.
Flanges with gaskets, bolting, pipes and fittings in one package
Flanges rarely travel alone. Gasify can consolidate flanges with spiral wound and RTJ gaskets, stud bolts and nuts, steel pipes, butt weld and forged fittings and industrial valves in a single package, with phased deliveries to the UAE, GCC, Middle East, Africa and South Asia. Explore how we work on our project supply page or read about oil and gas supply.
12 / FAQ
Flange supply questions.
Are you a flange supplier and stockist in the UAE?
Gasify combines UAE-based supplier and stockist support with international manufacturer sourcing. Availability depends on flange type, size, pressure class, material and quantity, so current stock is confirmed for each RFQ.
Can you supply flanges to ADNOC and Saudi Aramco project specifications?
Gasify supports procurement against project material requisitions, piping classes and client specifications, including ADNOC and Saudi Aramco requirements where the project calls for them. Approved manufacturer and vendor list requirements are reviewed for each project. Gasify does not represent an approval status unless it is formally documented.
Which types of flanges do you supply?
The range covers weld neck, long weld neck, slip-on, blind, socket weld, threaded and lap joint flanges, orifice flanges, spectacle blinds, spades and spacers, and large-diameter flanges, in carbon, low-temperature, alloy, stainless, duplex and nickel alloy materials.
What is the difference between a weld neck and a slip-on flange?
A weld neck flange has a tapered hub that is butt welded to the pipe and gives a smooth stress transition and a bore that matches the pipe, which suits high-pressure, high-temperature and cyclic service. A slip-on flange slides over the pipe and is welded inside and outside, which costs less and is easier to fit but has a lower fatigue strength.
What is the difference between ASME B16.5 and B16.47 flanges?
ASME B16.5 covers flanges from NPS ½ to 24 in Class 150 to 2500. ASME B16.47 covers large-diameter flanges from NPS 26 to 60 in two series. Series A (MSS SP-44) is the heavier series, and Series B (API 605) is more compact. The two series are not interchangeable.
What do Class 150, 300, 600, 900, 1500 and 2500 mean?
They are the ASME pressure classes. A flange's allowable working pressure falls as temperature rises and depends on the material group, so the rating must be read from the ASME B16.5 pressure-temperature tables for the actual material and design temperature.
What is the difference between a raised face and a ring type joint flange?
A raised face flange seals with a flat gasket such as a spiral wound gasket compressed between two raised faces. A ring type joint flange has a machined groove that holds a metal ring gasket, which seals through bolt load and is used in high-pressure and high-temperature service.
Which flange material matches A106 Gr B or API 5L pipe?
ASTM A105 is the usual match for A106 Gr B and A53 pipe. For API 5L X52 to X70 line pipe, ASTM A694 F52 to F70 flanges match the pipe strength. For low-temperature service, A350 LF2 is used with A333 Gr 6 pipe. The piping class decides the final selection.
Do you supply gaskets, studs and nuts with the flanges?
Yes. Spiral wound gaskets, ring type joint gaskets, sheet gaskets, insulation gasket kits, ASTM A193 stud bolts and A194 nuts can be supplied with the flanges as one package, to the grade and coating in the piping class.
Do you supply NACE MR0175 / ISO 15156 sour service flanges?
Sour service flanges can be sourced where the project specification requires them, including hardness limits, NACE-compliant bolting and the documentation stated on the datasheet. Requirements are confirmed before quotation.
What tests and certificates come with the flanges?
Flanges are supplied with EN 10204 3.1 material test certificates and heat-number marking to MSS SP-25. Impact tests, PMI, NDE, hardness reports, EN 10204 3.2 certification and third-party inspection can be coordinated where the project specifies them.
How do I request a quotation for flanges?
Send your MTO, BOQ or datasheet with flange type, size, pressure class, facing, bore or pipe schedule, material grade, standard, quantity, certificates and delivery location. The procurement team reviews the requirement and responds with a quotation.
Do you deliver flanges outside the UAE?
Yes. Gasify coordinates delivery from the UAE to the GCC, wider Middle East, Africa and South Asia, subject to product, quantity, destination and logistics requirements. Include the delivery location in your RFQ.
13 / START A REQUIREMENT
Send your flange MTO.
Share your MTO, BOQ, datasheet or piping class with the delivery location. Our procurement team will review grades, classes, facings and documentation, then coordinate sourcing, quotation and delivery.
PHONE / WHATSAPP+971 58 580 9068
SERVINGUAE · GCC · Middle East · Africa · South Asia
