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PETROL STEEL CO., LTD. is dedicated to establishing itself as a leading global specialist in the one-stop supply of stainless steel flanges for industrial piping systems. Within these systems, PESCO stainless steel flanges serve as critical components connecting pipes, valves, and equipment; their sealing reliability and pressure-bearing capacity directly determine the operational safety of the entire pipeline infrastructure. Whether for high-pressure transmission on deep-sea oil and gas platforms, fluid control in liquid-cooling pipelines, or high-purity fluid management in biopharmaceutical facilities, high-quality stainless steel flanges are indispensable for ensuring the smooth and efficient operation of industrial piping networks. Leveraging years of deep expertise and accumulated experience in the industrial piping sector, PETROL STEEL CO., LTD. (hereinafter referred to as PESCO www.petrolsteel.com) offers the global market a comprehensive, end-to-end service for stainless steel flanges—spanning everything from technical design and precision manufacturing to international logistics and delivery. Supported by extensive, year-round inventory and a comprehensive range of specifications and material grades, we are committed to helping international engineering firms (EPCs), distributors, and end-users overcome common industry challenges—such as lengthy procurement cycles, fragmented specifications, difficulties in matching standards, and the complexities of adapting products to specific operating conditions.
The materials of the stainless steel flanges that Petrol Steel can produce are as follows,
Austenitic Stainless Steel, 304, 304L, 316, 316L, 310S, 321, 321H, 347, 347H; ASTM A312-24, ASTM A358-24, ASTM A249-24, ASTM A778-24, ASTM A813-24, ASTM A1016-23, ASTM A999-23, etc;
Super Austenitic Stainless Steel, S31803,S32205,S32750,S32760,S32304,S32003; STM A789-24,ASTM A790-24, ASTM A928-21;
Duplex Stainless Steel, UNS N10276,UNS N08825, UNS N08811, UNS N08810, UNS N06625, UNS N04400, ASTM B619-23, ASTM B705-24, ASTM B514-19, ASTM B515-22, ASTM B474-23, etc;
Nickel Based Alloy, Grade 1, Grade 2, Grade 3, Grade 7, Grade 9 ,Grade 11, Grade 12 ASTM B338-17 ASTM B862-23, etc;
Copper and Copper Alloy, C70600,C70620,C71500,C71520; ASTM B608-18,ASTM B467-22, etc;
Bimetal Composite, X46M+LC1812, X65M+UNS N06625, X65M+UNS N08825, Q345R+316L, Q245R+S30403, Q390C+S32304; API Spec 5LD (R2020), etc.
PETROL STEEL CO., LTD has a full range of stainless steel flange specifications and materials, covering multiple standards and various complex connection conditions, which can meet the different quantity requirements of different trade orders or any complex engineering projects. PESCO's core competitiveness lies in its complete range of stainless steel flanges. Decades of experience in flange supply have enabled us to fully understand the differentiated demands for stainless steel flange structures in different regional markets and industry standards around the world, and have established a massive inventory of stainless steel flanges covering all major mainstream types, special stainless steel flanges, non-standard customized stainless steel flanges, cladding flanges, and high-pressure self-tightening flanges (P-lok). For example, the high-reliability stainless steel butt welding flange series includes stainless steel necked butt welding flanges (Weld Neck Flanges, WN), which is specially designed for petroleum, chemical and high-temperature and high-pressure steam pipelines with excellent stress distribution and fatigue resistance; and stainless steel long-neck butt welding flange (Long Weld Neck), which is often used in extreme working conditions that require direct welding of containers or heavy equipment. Universal and economical connection series of stainless steel flanges, including stainless steel plate-type flat weld flanges (Slip-On Flanges, SO/PL), which are easy to install and cost-effective, and are widely used in municipal water supply and drainage and low-pressure industrial pipe networks; stainless steel socket weld flanges (SW) are provided, which are suitable for instruments and process pipelines with small diameter, high pressure and requiring high-strength corner welding. Special functions include stainless steel disassembly flanges, including all types of stainless steel threaded flanges (TH), which can quickly connect small-diameter low-pressure pipelines without welding, especially suitable for explosion-proof areas where open flame welding is not allowed; full-size stainless steel blind flanges (BL) for pipe end sealing or isolated inspection of pipeline systems; and stainless steel lap joint flanges (Lap Joint Flanges) with stub ends to meet the needs of frequent disassembly and precise hole alignment. Special stainless steel flanges, reducing flanges, non-standard customized stainless steel flanges, cladding flanges, and high-pressure self-tightening flanges (P-lok). Special stainless steel flanges, such as stainless steel reducing flanges (Reducing Flanges), non-standard customized stainless steel flanges, cladding flanges, and high-pressure self-tightening flanges (P-lok), are available to solve the problem of connecting flanges and pipe fittings of pipes with different nominal diameters.
PETROL STEEL's stainless steel flange inventory of diversified standards and materials can fully cope with corrosion and extreme environments in industrial scenes around the world. In terms of stainless steel flange standards, PETROL STEEL's stainless steel flange inventory fully covers international mainstream stainless steel flange standards such as ASME/ANSI B16.5, B16.47 (American standard), EN 1092-1 (European standard), DIN (German standard), GOST (Russian standard), JIS B2220 (Japanese standard), and GB/T (national standard). The pressure level extends from Class 150 (PN 6/10/16) to Class 2500 (PN 100/160), ensuring that no matter which continent the pipeline project is located on, it can accurately match the stainless steel flanges and pipe fittings required by the local pipeline project design drawing specifications. The breadth of industrial applications determines that stainless steel flange materials must have strong adaptability to working conditions. PESCO www.petrolsteel.com has a complete reserve of stainless steel flange materials, which can easily handle complex environments ranging from conventional fluids to extreme corrosion, ultra-low temperatures to ultra-high temperatures. For example, in general corrosion-resistant and food-grade stainless steel flanges, PESCO mainly supplies 304/304L and 316/316L austenitic stainless steel flanges. Among them, the 304 series is suitable for food and beverage, water treatment, and general neutral media; 316L has excellent chloride ion and pitting corrosion resistance due to the addition of molybdenum. It is the first choice for stainless steel flanges of pipelines in seawater desalination, coastal chemical industry, and pharmaceutical and bioengineering (which can meet the needs of sanitary polishing). In terms of high-temperature resistance and anti-sensitization stainless steel, PESCO provides 321 (including Ti) and 347 (including Nb) stainless steel flanges, which can effectively inhibit intergranular corrosion and are specially used in sensitive working conditions such as refinery heating furnace pipelines and cogeneration high-temperature steam pipelines that are exposed to 425°C to 800°C for a long time. In terms of high-strength dual-phase and special alloys, for deep-sea oil and gas, FLNG modules and strong acid chemical reaction devices, PESCO always stocks duplex steel flanges (2205/Duplex) and super duplex steel flanges (2507/Super Duplex). While having high strength and anti-pitting capabilities, PESCO can deploy 904L, Monel, Inconel, and other nickel-based alloy flanges to serve extreme sulfuric acid, phosphoric acid media, or cryogenic LNG (-162℃) ultra-low temperature transmission systems. In addition, PESCO can also produce, process, and supply cladding flanges and high-pressure self-tightening flanges. Thanks to this complete reserve of standards, materials and specifications (DN 15 to DN 2000+), PESCO's stainless steel flanges have been widely used in oil and gas (upstream mining to downstream refining), petrochemicals, marine engineering, electric power (thermal power/nuclear power/new energy), shipbuilding, high-level municipal environmental protection, GMP-certified pharmaceutical company assembly lines, liquid cooling pipelines, thermal energy management and other pipeline projects, truly realizing that "PESCO stainless steel flanges to the world and can be matched by all industries."
PESCO’s end-to-end, one-stop service—spanning everything from design consultation to logistics—eliminates the hidden friction often associated with international procurement. Diverging from traditional consolidated-order trading models, PESCO www.petrolsteel.com has established a comprehensive, closed-loop service ecosystem encompassing "Design Consultation—Production/Deep Processing—Quality Inspection—Global Logistics." Our expert technical team can intervene early in the bidding or detailed design phases; drawing upon client-provided specifications regarding fluid chemical properties, design pressure/temperature, and flange torque requirements, we offer professional material selection calculations and standards-compliance recommendations to preemptively mitigate the risk of subsequent interface incompatibilities. Leveraging our proprietary stainless steel flange machining facility—alongside a network of deeply integrated, certified stainless steel forging partners—PESCO is uniquely positioned to not only rapidly mobilize extensive inventories of stock flanges to fulfill urgent orders but also to demonstrate robust capabilities in customizing non-standard flanges. We efficiently execute specialized modifications—such as custom drilling patterns (e.g., converting 8-hole configurations to 6-hole), machining of specialized sealing faces (including RF, FF, and RTJ types), high-precision mirror polishing, and beveling/edge preparation. By combining these capabilities with our mature global logistics infrastructure—covering sea freight, air freight, and multimodal transport integration—PESCO offers flexible delivery services under various international trade terms (Incoterms), ranging from FOB, CIF, and CFR to DAP. Supported by comprehensive material certificates (EN 10204 3.1/3.2 MTC) and third-party inspection services (from agencies such as BV, SGS, and TUV), we ensure timely and seamless integration with multinational procurement workflows, thereby significantly reducing project-level supply chain management costs.
In today's global market—characterized by significant fluctuations in stainless steel raw material costs—accurate foresight, a deep understanding of client needs, reliable delivery capabilities, and the technical expertise of a professional team are of paramount importance. Committed to providing a "one-stop service" that features comprehensive standard coverage, unrestricted material options, immediate stock availability, and rapid, efficient responsiveness, PETROL STEEL CO., LTD. www.petrolsteel.com continuously works to shorten lead times for international buyers and minimize potential uncertainties to the greatest extent possible. We offer our clients not only high-quality stainless steel flanges but also the assurance that their procurement orders will be delivered on time.
In today's global market—characterized by significant fluctuations in stainless steel raw material costs—accurate foresight, a deep understanding of client needs, reliable delivery capabilities, and the technical expertise of a professional team are of paramount importance. Committed to providing a "one-stop service" that features comprehensive standard coverage, unrestricted material options, immediate stock availability, and rapid, efficient responsiveness, PETROL STEEL CO., LTD. www.petrolsteel.com continuously works to shorten lead times for international buyers and minimize potential uncertainties to the greatest extent possible. We offer our clients not only high-quality stainless steel flanges but also the assurance that their procurement orders will be delivered on time.
Superior Quality, Prompt Delivery, Favorable Feedback. All are available in PESCO.
Select PESCO, you will be right!
Headquarters: A-4F, Vantone Center, A6, Chaowai St., Chaoyang Dist., Beijing, China.
Tel/Fax: +86 10 8599 9168
WhatsApp/WeChat: +86 159 0035 7871
Email: sales@petrolsteel.com, jackywinn@foxmail.com
The reference technical links of the stainless steel stainless steel pipes:
https://www.petrolsteel.com/stainless-steel-pipe-p.html
The common appearance types of stainless steel flanges that Petrol Steel can produce are as follows, ss Slip-On Flanges (SO Flanges) or ss Slip-On Weld Flanges, ss Welding Neck Flanges (WN Flanges), ss Butt Weld Flanges, ss Blind Flanges (BL Flanges), ss Socket Weld Flanges (SW Flanges), ss Threaded Flanges (Screwed Flanges), ss Lap Joint Flanges (LJ Flanges, Loose Flanges), ss Plate Flanges, ss Flat Flanges, ss Orifice Flanges, common standard ss flanges, custom ss flanges, special ss flanges, cladding flanges, etc.
The common sealing facing types of stainless steel flanges that Petrol Steel www.petrolsteel.com can produce are as follows, RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint), MF, FM (Male & Female Face), TG (Tongue & Groove Face), etc.The materials of the stainless steel flanges that Petrol Steel can produce are as follows,
Austenitic Stainless Steel, 304, 304L, 316, 316L, 310S, 321, 321H, 347, 347H; ASTM A312-24, ASTM A358-24, ASTM A249-24, ASTM A778-24, ASTM A813-24, ASTM A1016-23, ASTM A999-23, etc;
Super Austenitic Stainless Steel, S31803,S32205,S32750,S32760,S32304,S32003; STM A789-24,ASTM A790-24, ASTM A928-21;
Duplex Stainless Steel, UNS N10276,UNS N08825, UNS N08811, UNS N08810, UNS N06625, UNS N04400, ASTM B619-23, ASTM B705-24, ASTM B514-19, ASTM B515-22, ASTM B474-23, etc;
Nickel Based Alloy, Grade 1, Grade 2, Grade 3, Grade 7, Grade 9 ,Grade 11, Grade 12 ASTM B338-17 ASTM B862-23, etc;
Copper and Copper Alloy, C70600,C70620,C71500,C71520; ASTM B608-18,ASTM B467-22, etc;
Bimetal Composite, X46M+LC1812, X65M+UNS N06625, X65M+UNS N08825, Q345R+316L, Q245R+S30403, Q390C+S32304; API Spec 5LD (R2020), etc.
PETROL STEEL CO., LTD has a full range of stainless steel flange specifications and materials, covering multiple standards and various complex connection conditions, which can meet the different quantity requirements of different trade orders or any complex engineering projects. PESCO's core competitiveness lies in its complete range of stainless steel flanges. Decades of experience in flange supply have enabled us to fully understand the differentiated demands for stainless steel flange structures in different regional markets and industry standards around the world, and have established a massive inventory of stainless steel flanges covering all major mainstream types, special stainless steel flanges, non-standard customized stainless steel flanges, cladding flanges, and high-pressure self-tightening flanges (P-lok). For example, the high-reliability stainless steel butt welding flange series includes stainless steel necked butt welding flanges (Weld Neck Flanges, WN), which is specially designed for petroleum, chemical and high-temperature and high-pressure steam pipelines with excellent stress distribution and fatigue resistance; and stainless steel long-neck butt welding flange (Long Weld Neck), which is often used in extreme working conditions that require direct welding of containers or heavy equipment. Universal and economical connection series of stainless steel flanges, including stainless steel plate-type flat weld flanges (Slip-On Flanges, SO/PL), which are easy to install and cost-effective, and are widely used in municipal water supply and drainage and low-pressure industrial pipe networks; stainless steel socket weld flanges (SW) are provided, which are suitable for instruments and process pipelines with small diameter, high pressure and requiring high-strength corner welding. Special functions include stainless steel disassembly flanges, including all types of stainless steel threaded flanges (TH), which can quickly connect small-diameter low-pressure pipelines without welding, especially suitable for explosion-proof areas where open flame welding is not allowed; full-size stainless steel blind flanges (BL) for pipe end sealing or isolated inspection of pipeline systems; and stainless steel lap joint flanges (Lap Joint Flanges) with stub ends to meet the needs of frequent disassembly and precise hole alignment. Special stainless steel flanges, reducing flanges, non-standard customized stainless steel flanges, cladding flanges, and high-pressure self-tightening flanges (P-lok). Special stainless steel flanges, such as stainless steel reducing flanges (Reducing Flanges), non-standard customized stainless steel flanges, cladding flanges, and high-pressure self-tightening flanges (P-lok), are available to solve the problem of connecting flanges and pipe fittings of pipes with different nominal diameters.
PETROL STEEL's stainless steel flange inventory of diversified standards and materials can fully cope with corrosion and extreme environments in industrial scenes around the world. In terms of stainless steel flange standards, PETROL STEEL's stainless steel flange inventory fully covers international mainstream stainless steel flange standards such as ASME/ANSI B16.5, B16.47 (American standard), EN 1092-1 (European standard), DIN (German standard), GOST (Russian standard), JIS B2220 (Japanese standard), and GB/T (national standard). The pressure level extends from Class 150 (PN 6/10/16) to Class 2500 (PN 100/160), ensuring that no matter which continent the pipeline project is located on, it can accurately match the stainless steel flanges and pipe fittings required by the local pipeline project design drawing specifications. The breadth of industrial applications determines that stainless steel flange materials must have strong adaptability to working conditions. PESCO www.petrolsteel.com has a complete reserve of stainless steel flange materials, which can easily handle complex environments ranging from conventional fluids to extreme corrosion, ultra-low temperatures to ultra-high temperatures. For example, in general corrosion-resistant and food-grade stainless steel flanges, PESCO mainly supplies 304/304L and 316/316L austenitic stainless steel flanges. Among them, the 304 series is suitable for food and beverage, water treatment, and general neutral media; 316L has excellent chloride ion and pitting corrosion resistance due to the addition of molybdenum. It is the first choice for stainless steel flanges of pipelines in seawater desalination, coastal chemical industry, and pharmaceutical and bioengineering (which can meet the needs of sanitary polishing). In terms of high-temperature resistance and anti-sensitization stainless steel, PESCO provides 321 (including Ti) and 347 (including Nb) stainless steel flanges, which can effectively inhibit intergranular corrosion and are specially used in sensitive working conditions such as refinery heating furnace pipelines and cogeneration high-temperature steam pipelines that are exposed to 425°C to 800°C for a long time. In terms of high-strength dual-phase and special alloys, for deep-sea oil and gas, FLNG modules and strong acid chemical reaction devices, PESCO always stocks duplex steel flanges (2205/Duplex) and super duplex steel flanges (2507/Super Duplex). While having high strength and anti-pitting capabilities, PESCO can deploy 904L, Monel, Inconel, and other nickel-based alloy flanges to serve extreme sulfuric acid, phosphoric acid media, or cryogenic LNG (-162℃) ultra-low temperature transmission systems. In addition, PESCO can also produce, process, and supply cladding flanges and high-pressure self-tightening flanges. Thanks to this complete reserve of standards, materials and specifications (DN 15 to DN 2000+), PESCO's stainless steel flanges have been widely used in oil and gas (upstream mining to downstream refining), petrochemicals, marine engineering, electric power (thermal power/nuclear power/new energy), shipbuilding, high-level municipal environmental protection, GMP-certified pharmaceutical company assembly lines, liquid cooling pipelines, thermal energy management and other pipeline projects, truly realizing that "PESCO stainless steel flanges to the world and can be matched by all industries."
PESCO’s end-to-end, one-stop service—spanning everything from design consultation to logistics—eliminates the hidden friction often associated with international procurement. Diverging from traditional consolidated-order trading models, PESCO www.petrolsteel.com has established a comprehensive, closed-loop service ecosystem encompassing "Design Consultation—Production/Deep Processing—Quality Inspection—Global Logistics." Our expert technical team can intervene early in the bidding or detailed design phases; drawing upon client-provided specifications regarding fluid chemical properties, design pressure/temperature, and flange torque requirements, we offer professional material selection calculations and standards-compliance recommendations to preemptively mitigate the risk of subsequent interface incompatibilities. Leveraging our proprietary stainless steel flange machining facility—alongside a network of deeply integrated, certified stainless steel forging partners—PESCO is uniquely positioned to not only rapidly mobilize extensive inventories of stock flanges to fulfill urgent orders but also to demonstrate robust capabilities in customizing non-standard flanges. We efficiently execute specialized modifications—such as custom drilling patterns (e.g., converting 8-hole configurations to 6-hole), machining of specialized sealing faces (including RF, FF, and RTJ types), high-precision mirror polishing, and beveling/edge preparation. By combining these capabilities with our mature global logistics infrastructure—covering sea freight, air freight, and multimodal transport integration—PESCO offers flexible delivery services under various international trade terms (Incoterms), ranging from FOB, CIF, and CFR to DAP. Supported by comprehensive material certificates (EN 10204 3.1/3.2 MTC) and third-party inspection services (from agencies such as BV, SGS, and TUV), we ensure timely and seamless integration with multinational procurement workflows, thereby significantly reducing project-level supply chain management costs.
In today's global market—characterized by significant fluctuations in stainless steel raw material costs—accurate foresight, a deep understanding of client needs, reliable delivery capabilities, and the technical expertise of a professional team are of paramount importance. Committed to providing a "one-stop service" that features comprehensive standard coverage, unrestricted material options, immediate stock availability, and rapid, efficient responsiveness, PETROL STEEL CO., LTD. www.petrolsteel.com continuously works to shorten lead times for international buyers and minimize potential uncertainties to the greatest extent possible. We offer our clients not only high-quality stainless steel flanges but also the assurance that their procurement orders will be delivered on time.
In today's global market—characterized by significant fluctuations in stainless steel raw material costs—accurate foresight, a deep understanding of client needs, reliable delivery capabilities, and the technical expertise of a professional team are of paramount importance. Committed to providing a "one-stop service" that features comprehensive standard coverage, unrestricted material options, immediate stock availability, and rapid, efficient responsiveness, PETROL STEEL CO., LTD. www.petrolsteel.com continuously works to shorten lead times for international buyers and minimize potential uncertainties to the greatest extent possible. We offer our clients not only high-quality stainless steel flanges but also the assurance that their procurement orders will be delivered on time.
Superior Quality, Prompt Delivery, Favorable Feedback. All are available in PESCO.
Select PESCO, you will be right!
Headquarters: A-4F, Vantone Center, A6, Chaowai St., Chaoyang Dist., Beijing, China.
Tel/Fax: +86 10 8599 9168
WhatsApp/WeChat: +86 159 0035 7871
Email: sales@petrolsteel.com, jackywinn@foxmail.com
The reference technical links of the stainless steel stainless steel pipes:
https://www.petrolsteel.com/stainless-steel-pipe-p.html
