Import A790 S31803 Pipe Reducer — Buy in wholesale FOB from Supplier in China
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A790 s31803 pipe reducer
The A790 S31803 pipe reducer from Tobo Pipeline Equipment (Shanghai) Co., Ltd. is a duplex stainless steel fitting designed for connecting pipes of different diameters in high-demand environments. It is manufactured from UNS S31803, the standard designation for 2205 duplex stainless steel, which combines austenitic and ferritic microstructures to deliver exceptional strength and corrosion resistance. The fitting is supplied as seamless or welded, meeting ASTM A790 specifications for pressure integrity and dimensional accuracy in industrial piping systems.
UNS S31803 provides superior resistance to stress corrosion cracking, pitting, and crevice corrosion, particularly in chloride-rich environments such as offshore oil and gas installations or chemical processing plants. The material’s typical composition includes 22% chromium, 5-6% nickel, and 3% molybdenum, with a ferrite content of 35-55%. Standard surface finishes for duplex reducers include pickled and passivated, while wall thicknesses and diameters are customised to project requirements. Industry-standard tolerances for concentric reducers ensure smooth flow transitions and minimal pressure drop.
This reducer is used in oil and gas pipelines, desalination plants, and marine applications where reliability under high pressure and temperature is critical. Buyers typically source it for projects requiring ASME B16.9 compliance or equivalent international standards. Tobo Pipeline Equipment (Shanghai) Co., Ltd. supplies the fitting from its facility in Qingpu District, with logistics arranged for international shipment. Confirm packaging, MOQ, and lead time directly with the supplier, as these vary by order size and destination port.
| Material Grade | UNS S31803 (2205 Duplex Stainless Steel) |
| Standard | ASTM A790 |
| Type | Seamless or Welded Pipe Reducer |
| Typical Chromium Content | 22% typical |
| Typical Nickel Content | 5-6% typical |
| Typical Molybdenum Content | 3% typical |
| Ferrite Content | 35-55% typical |
| Corrosion Resistance | Superior to austenitic 304/316 in chloride environments |
| Surface Finish | Pickled and Passivated (standard) |
| Dimensional Standard | ASME B16.9 (typical for concentric reducers) |
Tobo Pipeline Equipment (Shanghai) Co., Ltd. operates from No.208, Lvdi Road, Baihe Town, in Shanghai’s Qingpu District. The company is classified as an imported-tier supplier with a harbor trust tier, indicating it meets baseline verification standards for international trade. While its response rate is currently unrecorded, the address and tier signals confirm its role as a specialist in pipeline fittings, including duplex stainless steel components for industrial applications.
The supplier’s profile does not disclose production capacity, certifications, or client history, so buyers should request these details directly. Tobo Pipeline Equipment focuses on fittings compliant with ASTM and ASME standards, catering to sectors like oil and gas, chemical processing, and marine engineering. Its location in Shanghai provides access to major ports, facilitating export logistics for bulk or project-specific orders.
The ASTM A790 S31803 pipe reducer is a seamless or welded duplex stainless steel fitting designed for connecting pipes of different diameters in demanding environments. S31803 (UNS designation for 2205 duplex stainless) offers superior corrosion resistance and strength compared to standard austenitic grades, making it ideal for oil and gas, chemical processing, and marine applications. This reducer is widely sourced for international projects requiring high-reliability piping systems compliant with ASTM A790 specifications.
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Sourcing A790 S31803 Pipe Reducer from Tobo Pipeline Equipment (Shanghai) Co., Ltd. - China Import Guide
Before ordering A790 S31803 reducers from Tobo Pipeline Equipment (Shanghai) Co., Ltd., verify the exact material grade and heat number to ensure traceability. Request the MTR and confirm the reducer’s compliance with ASTM A790 and any project-specific standards such as NACE MR0175 for sour service. Check if the supplier can provide third-party inspection reports from agencies like SGS or Bureau Veritas for added assurance.
Clarify logistics details, including the nearest port of shipment (likely Shanghai) and whether the supplier can handle FOB or CIF terms. Lead times for duplex reducers vary based on size and quantity; standard lead times for stock sizes may range from 4 to 8 weeks, while custom dimensions can take 10-12 weeks. Confirm packaging standards, as reducers are typically crated or palletised with rust-proof coatings for export.
For quality checks, insist on pre-shipment inspection by an independent agency to validate dimensions, surface finish, and material properties. Ensure the supplier provides all required documentation, including test certificates, packing lists, and a certificate of origin. For critical applications, conduct a factory audit or request samples for destructive testing to verify the reducer’s performance under your operating conditions.
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30 suppliersBuy A790 S31803 Pipe Reducer in Bulk — Verified Supplier in China
When sourcing A790 S31803 Pipe Reducer for your business, securing the right balance of quality and cost is essential. Tobo Pipeline Equipment (Shanghai) Co., Ltd., a verified supplier based in China, offers this product with key specifications including ASTM A790 / ASME SA790, UNS S31803 (Duplex 2205), and 22-23% Cr, 3-3.5% Mo, 4.5-6.5% Ni, 0.14-0.20% N, Fe balance. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $1835./Unit and manage bulk orders with a minimum order quantity (MOQ) of 1 Unit. This product is actively traded under HS Code 7307.23, making it a staple in the Flanges sector with strong demand from importing countries worldwide.
A790 S31803 Pipe Reducer Specifications, Trade Terms & Pricing
Importing A790 S31803 Pipe Reducer requires careful attention to shipping logistics, customs compliance, and secure payment terms. Tobo Pipeline Equipment (Shanghai) Co., Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 7307.23 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading B2B marketplace designed to make cross-border trade secure and efficient.
About Tobo Pipeline Equipment (Shanghai) Co., Ltd. — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this A790 S31803 Pipe Reducer has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Flanges category and connect with top-tier exporters on our comprehensive global B2B marketplace. Start your sourcing journey today.
Import A790 S31803 Pipe Reducer — Shipping, Logistics & Customs
Importing A790 S31803 Pipe Reducer requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 7307.23 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About A790 S31803 Pipe Reducer
What is the wholesale price of A790 S31803 Pipe Reducer?
The current listed wholesale price for A790 S31803 Pipe Reducer from Tobo Pipeline Equipment (Shanghai) Co., Ltd. is $1835./Unit on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Tobo Pipeline Equipment (Shanghai) Co., Ltd. through EximNext.
What is the Minimum Order Quantity (MOQ) for A790 S31803 Pipe Reducer?
The supplier, Tobo Pipeline Equipment (Shanghai) Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Unit for A790 S31803 Pipe Reducer. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for A790 S31803 Pipe Reducer?
For international shipping and customs clearance, A790 S31803 Pipe Reducer is classified under HS Code 7307.23. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import A790 S31803 Pipe Reducer from China?
To import A790 S31803 Pipe Reducer from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Tobo Pipeline Equipment (Shanghai) Co., Ltd.. Ensure you have the necessary import licenses for Flanges products in your destination country.
Is Tobo Pipeline Equipment (Shanghai) Co., Ltd. a verified supplier?
Yes, Tobo Pipeline Equipment (Shanghai) Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
What are the key specifications of A790 S31803 Pipe Reducer?
The key specifications for A790 S31803 Pipe Reducer supplied by Tobo Pipeline Equipment (Shanghai) Co., Ltd. include ASTM A790 / ASME SA790, UNS S31803 (Duplex 2205), and 22-23% Cr, 3-3.5% Mo, 4.5-6.5% Ni, 0.14-0.20% N, Fe balance. For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of A790 S31803 Pipe Reducer?
Tobo Pipeline Equipment (Shanghai) Co., Ltd. offers A790 S31803 Pipe Reducer with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import A790 S31803 Pipe Reducer the most?
A790 S31803 Pipe Reducer is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Tobo Pipeline Equipment (Shanghai) Co., Ltd. through our platform.
What certifications does this A790 S31803 Pipe Reducer supplier hold?
Tobo Pipeline Equipment (Shanghai) Co., Ltd. maintains international quality certifications. These ensure that the A790 S31803 Pipe Reducer meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for A790 S31803 Pipe Reducer on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Tobo Pipeline Equipment (Shanghai) Co., Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Tobo Pipeline Equipment (Shanghai) Co., Ltd..
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