threadolet & weldolet & stub end for pipe setup | Exporter

Inflated Tier-2 & Tier-3 Pricing

Western distributors routinely mark up threadolet and weldolet products by 30–40% over ex-works factory prices. You pay for their inventory carrying costs, not engineering value.

Inconsistent Quality & Missing Traceability

A recent batch of imported stub ends for pipe setup failed due to improper heat treatment — no mill certificate, no heat number traceability. Rework on-site cost more than the order itself.

Freight Cost & Delivery Shock

Ocean freight volatility added 18–25% to landed costs in 2024–2025. A fragmented supplier base means multiple partial shipments — multiplying your freight and clearance overhead.

Dimensional Errors on Complex Configurations

Reducing branch connections with a threadolet on a 6-inch schedule 80 run pipe requires precise NPT tolerance and angular alignment. Off-the-shelf catalog parts rarely fit your exact spool drawing.

Compliance Gaps with ASME B31 & MSS SP-97

When sustained stress indices at tee connections are not properly accounted for, system designers expose the asset to early fatigue failure. You need components engineered to the applicable piping code — not look-alike imports.

No OEM/ODM Design Support

Your project calls for a custom-length stub end with an unusual lap thickness. Traditional suppliers say "we only sell standard catalog items." That leaves you compromising your design or paying premium custom shop rates.

Carbon Steel (ASTM A105 / A350 LF2)

• Working temp: -29°C to 425°C

• Best for: General oil & gas, water, steam

• Cost: $ (baseline)

• Yield strength: ≥ 250 MPa

Suitable for: 3000# / 6000# threadolet & weldolet

Stainless Steel (A182 F304 / F316L)

• Working temp: -196°C to 815°C

• Best for: Chemical, food & beverage, pharmaceutical

• Cost: $$ (1.8–2.5x carbon steel)

• Mo content in F316L: 2–3%

Suitable for: Stub end + lap joint flange alloys

Chrome-Moly Alloy (F11 / F22)

• Working temp: up to 593°C

• Best for: High-temp steam, hydrogen service

• Cost: $$$ (2.5–3.5x carbon steel)

• Cr content: 1.25% (F11) / 2.25% (F22)

Suitable for: Power generation, refining

Duplex / Super Duplex (S31803 / S32750)

• Working temp: -50°C to 300°C

• Best for: Offshore, seawater, chloride exposure

• Cost: $$$$ (4–5x carbon steel)

• PREN: ≥ 34 (S32750)

Suitable for: Offshore flange connector systems

High-Pressure Gas Distribution Skid

Challenge: A Texas-based skid manufacturer specified weldolets for 40+ branch connections on 6" and 8" SCH 80 A106B pipe at 1,480 psi operating pressure.

Solution: We supplied 6,000# Class weldolets with 100% ultrasonic testing, full PMI verification, and NACE MR0175 compliance.

Result: ✅ 37% cost reduction vs. previous US distributor pricing · ✅ Zero dimensional rejects on 42 units · ✅ Delivered in 18 days.

Offshore Platform Corrosion-Resistant Manifold

Challenge: A Dutch EPC contractor needed duplex 2205 stub ends for pipe setup on a 12" seawater injection manifold, requiring MSS SP-43 short pattern with 250 μin face finish.

Solution: We machined 36 super duplex (S32750) stub ends from forgings with dye penetrant inspection and dimensional reports per customer drawing.

Result: ✅ 41% lower landed cost than European mill sourced · ✅ Passed third-party inspection by SGS on first attempt · ✅ 25-day delivery.

Steam System Retrofit — Power Plant

Challenge: A Canadian power utility needed F22 chrome-moly threadolet fittings for a superheated steam line at 540°C, with strict traceability from heat to final dimension.

Solution: Supplied A182 F22 Class 6000 weldolets and threadolet fittings with PMI on 100% of pieces, accompanied by EN 10204 3.2 material certificates.

Result: ✅ 23% reduction in procurement cycle time · ✅ Single consolidated shipment saved ~$6,800 in freight · ✅ Life expectancy projected > 20 years.

🏭 15,000 m² Factory
Located in the "Pipe Fitting Capital" of Mengcun County, Cangzhou, Hebei Province

📦 5,000+ Tons Annual Capacity
Dedicated QC room with PMI, UT, hydro & hardness testing

✅ Certifications
ISO 9001:2015 · ASME B16.9 · B16.11 · MSS SP-97 · PED 2014/68/EU · RoHS

"We switched our entire branch fitting BOM to Cangzhou Weihuan. Their weldolets match our isometric drawings perfectly, and the PMI report bundles saved us weeks of QC time."

Michael S.Piping Manager · Texas, USA

"Our offshore manifold project needed 36 duplex stub ends. Weihuan not only met the tight dimensional tolerance, but also arranged third-party SGS inspection seamlessly. Truly a professional exporter."

Anouk van der BergProcurement Engineer · Rotterdam, Netherlands

"The threadolet fittings from Weihuan saved us roughly $2,500 per skid. Quality is consistent across batches, and the material certs are always in perfect order. Our QA team is happy."

James OkaforOperations Director · Calgary, Canada

Q1: What is the minimum order quantity (MOQ) for custom threadolet / weldolet / stub end fittings?

A: Our standard MOQ is 100 pieces for common sizes and materials. For OEM/ODM custom dimensions or exotic alloys (duplex, Inconel, Monel), MOQ starts at 30 pieces with shared die/fixture cost. We can also support sample orders (5–10 pcs) for pre-qualification at nominal cost, refundable on bulk order.

Q2: What are the key differences between a threadolet and a weldolet?

A: A threadolet uses a threaded (NPT) branch outlet and is joined to the run pipe with a fillet weld — ideal for small-diameter, high-pressure auxiliary lines. A weldolet has a butt-weld or socket-weld outlet and a full-penetration weld preparation on the run side, providing greater structural integrity and fatigue resistance. Choose a weldolet for mainline branches, and a threadolet for instrument or utility takeoffs where threading is preferred to welding.

Q3: Can you manufacture stub ends to MSS SP-43 short pattern instead of ASME B16.9?

A: Yes. We supply both ASME B16.9 long pattern and MSS SP-43 short pattern stub ends for pipe setup with lap joint flanges. MSS SP-43 is typically specified for stainless steel and allows a more compact face-to-face dimension, reducing material cost where space is constrained. Our engineering team will confirm the correct length and lap thickness based on your flange standard.

Q4: How do you handle quality assurance and third-party inspection?

A: Every batch is subject to 100% dimensional inspection, PMI (Positive Material Identification) on alloy products, and hydrostatic/pneumatic testing where applicable. We welcome third-party inspection by SGS, BV, TÜV, or Lloyds at our factory. Test certificates comply with EN 10204 3.1/3.2 and are issued within 5 working days of shipment.

Q5: What are your payment terms and Incoterms for export orders?

A: We accept T/T (30% deposit, 70% before shipment), L/C at sight, and for established customers, D/P or 60-day credit terms on qualifying order volumes. Incoterms: FOB Tianjin/Xingang, CIF, CFR, DAP, or DDP to your warehouse. Our logistics team consolidates sea, air, or rail freight and provides real-time shipment tracking.

Q6: How long does production and delivery take?

A: For standard in-stock items (common carbon steel threadolet, weldolet): 7–10 days. For custom alloy / stainless production runs: 20–30 days depending on quantity. Express air freight (DHL/FedEx) delivers to the USA/EU in 3–5 days after goods are ready. Sea freight from Tianjin to Houston or Rotterdam: 25–35 days.

Q7: Do you provide OEM/ODM support with custom drawings and branding?

A: Absolutely. Our in-house engineering team works with your isometric drawings, 3D models, or even a rough sketch. We provide free design review, suggest optimizations for cost reduction, and can machine custom dimensions, laser-mark your logo, and package per your specification. Many of our European customers private-label threadolet, weldolet and stub end products from our factory under their own brand.

Q8: What is the shelf-life / warranty period for your fittings?

A: We provide a 12-month warranty from shipment date covering manufacturing defects or material non-conformance. For storage, our fittings are anti-rust oiled, packed in wooden crates/cartons suitable for long-distance ocean freight. With proper storage (dry, ventilated, non-contact with chloride), carbon steel fittings maintain full integrity for 24+ months; stainless steel for 36+ months.

"We've ordered weldolets and threadolets from Weihuan for 2 years. Consistent quality, on-time shipping, and their QC reports are comprehensive. They truly behave like a partner, not just a vendor."

Robert K.Senior Buyer, Oil Field Equipment · Oklahoma, USA

"The stub ends we ordered were machined to a 250 μin Ra face finish exactly as specified. They even adjusted the lap thickness for our custom lap joint flanges. Outstanding engineering support."

Dr. Elena FischerTechnical Director, Process Plant Engineering · Germany

"As a systems integrator, we deal with dozens of component suppliers. Cangzhou Weihuan stands out for fast quotation and honest lead times. Their FOB Tianjin pricing made our bids 20% more competitive."

Ahmed Al-RashidSupply Chain Manager, EPC Contractor · UAE

"Delivery was delayed by 4 days due to a typhoon-induced port closure — beyond anyone's control. However, their team proactively alternated to air freight at a shared cost, which we appreciated. The product quality itself is excellent."

Marco P.Procurement Lead, Marine Equipment · Italy