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NXF UNS S30400 ASTM 304/JIS 304/EN 1.4301 OD DN15-1200 Class150-3000 Casting Fitting Stainless Steel Threaded Tee
2026-07-29 17:50 NXF GROUP
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Stainless steel 304 introduction
Stainless steel is an alloy steel based on iron and chromium, supplemented with alloying elements such as nickel, molybdenum, and manganese. The core principle is that chromium in the steel combines with oxygen to form a dense, stable chromium oxide passivation film on the material surface, isolating it from air and moisture and preventing the steel from rusting and corroding.304 stainless steel is an austenitic stainless steel and is the most widely used general-purpose stainless steel material.
Threaded Tee Introduction
A threaded tee is a type of industrial pipe fitting; its primary function is to divert the flow of the medium passing through it.
Threaded tees are manufactured using either forging or casting processes. Forging involves heating and shaping steel ingots or round bars, followed by machining the threads on a lathe, whereas casting entails melting steel ingots, pouring the molten metal into a tee-shaped mold, and allowing it to cool and solidify. Due to these differing manufacturing methods, the pressure-bearing capacities vary significantly; forged tees offer far superior pressure resistance compared to cast ones.
Threaded tees are manufactured using either forging or casting processes. Forging involves heating and shaping steel ingots or round bars, followed by machining the threads on a lathe, whereas casting entails melting steel ingots, pouring the molten metal into a tee-shaped mold, and allowing it to cool and solidify. Due to these differing manufacturing methods, the pressure-bearing capacities vary significantly; forged tees offer far superior pressure resistance compared to cast ones.
THREADED TEE DRAWING
Stainless steel 304 Chemical composition and mechanical properties
Threaded Tee Factory and Product Pictures
Stainless steel 304 PMI spectrum test certificate
Customer visit to the factory video
Threaded Tee Product Processing
1.Preliminary Mold Development:Product Drawing Confirmation: Confirm specifications (1/2", 3/4", 1 inch, etc.), thread standard (NPT/PT/BSPP), material (304/316), pressure rating (150LB), surface requirements, and whether casting markings need to be removed.Mold Machining (Aluminum Mold / Steel Mold): Machin the wax pressing mold; the mold cavity = tee shape; the mold includes a core structure, with allowance for internal thread machining.
2.Investment Casting Main Processes (Lost-Wax Casting):Wax Model Pressing: Molten paraffin wax is poured into a mold, cooled, and removed to obtain a wax model identical to the shape of the tee. Burrs and flash are then removed. Wax Model Assembly Welding: Multiple tee wax models are bonded to the gating wax rod to form a complete assembly, improving casting efficiency. Slurry Coating and Shell Formation (Surface Layer + Back Layer): The assembly is repeatedly immersed in refractory slurry + silica sand:Surface Layer: Fine silica sol slurry to ensure a smooth casting surface and reduce sand holes;Back Layer: Multiple layers of coarse sand for reinforcement, forming a hard ceramic shell;After shell formation, thorough air drying is required (constant temperature and humidity workshop, crucial! Insufficient drying easily leads to bulging and porosity. Dewaxing: The shell model is sent to a steam dewaxing kettle. High temperature and pressure melt the internal wax, causing it to flow out and forming a hollow cavity inside the shell. Firing the Shell Mold: High-temperature baking of the ceramic shell burns off residual wax, strengthens the shell mold, and preheats the shell itself.Melting and Casting: Stainless steel raw material (304/316 molten steel) is melted in an induction furnace and poured into the hollow ceramic shell cavity under vacuum/atmospheric conditions, then cooled and solidified. Vibration Cleaning: After cooling, the ceramic shell is vibrated to break it, the metal blank tee is removed, and the gate and runner are cut off.Shot Blasting: High-speed steel shot is used to blast the surface of the blank: removing oxide scale and improving surface finish, resulting in the cast blank tee.
3.Machining Process (Core! Determines Thread Accuracy): The inner hole of the cast blank is a smooth hole, without threads, and must be CNC machined: Clamp the blank on a CNC lathe/tapping machine. Flatten the end face, trim the inner and outer diameters of the pipe opening, and ensure dimensional tolerances. Taper the inner hole: Machin the internal thread according to standards (NPT tapered thread / BSP parallel thread).Key Process Points: Leave a machining allowance of 0.6~1.2mm for the thread; check with a go/no-go gauge after tapping to ensure thread interchangeability.
4.Post-processing, inspection, and packaging:Pickling and passivation (essential for stainless steel): Pickling removes the oxide layer from the machining process, and passivation treatment forms a rust-proof protective film on the surface, improving corrosion resistance.Full inspection process.Appearance: Screening for defects such as sand holes, pores, cracks, and dents;Dimensions: Caliper measurement of outer diameter and length;Threads: Inspection of thread go and no-go gauges;Pressure testing (as needed): Water pressure/air pressure testing to prevent leakage (100% pressure testing is commonly used for export orders);Marking (optional): Laser marking/cast marking: Material 316, pressure 150LB, specifications; many export customers require unmarked blanks, requiring grinding to remove the cast lettering.Cleaning and drying, applying plastic protective sleeves to the inner holes to protect the threads, and packing.
Our NXF GROUP advantage as follow:
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production,quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Packing & Delivery
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories.Established in 1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work toensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Managementand Craftsmanship."
Our advantage:3S Service(Small Quantity/Short Time/Special Material).
Certification
FAQ
1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern
Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central
America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled
seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese
6. Are you trading company or manufacturer ?
We are manufacturer.
7. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
8. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
9. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern
Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central
America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled
seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese
6. Are you trading company or manufacturer ?
We are manufacturer.
7. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
8. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
9. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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