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NXF UNS S31603 Stainless Steel 316L OD DN15-1200 Pressure Class 3000-9000 Forging Technology Threaded Olet
2026-07-15 15:34 NXF GROUP
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Product Description
316L Introduce
Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.Grade 316L, the low carbon version of 316 and is immune from sensitization (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures.
316L Stainless Steel Threaded Olet Introduce
The threaded olet is a forged threaded pipe branch fitting that complies with the ASME B16.11 standard. It is commonly made of A105 carbon steel or 316 stainless steel and is suitable for 3000# and 6000# high-pressure grades. It is widely used for branch pressure tapping, drain ports, and instrument interfaces in medium and small-sized diameter pipelines. The product is formed by a single-piece forging process. The bottom arc surface is welded around the entire outer wall of the main pipe, and the side is equipped with NPT standard conical internal threads. It can directly screw onto threaded branch pipes, instrument valves, pressure gauges and other accessories without the need for additional pipe welding. The installation is simple and efficient.
The integrated forging structure has uniform stress distribution, which is stronger than that of on-site hole reinforcement and small three-way fittings in terms of pressure-bearing capacity. It can withstand high temperatures and high pressures and resist medium corrosion. It is suitable for high-pressure pipelines in industries such as oil and gas, chemical engineering, power, and metallurgy. The inner and outer diameters of the pipe fitting are precisely turned and polished, with high thread accuracy and stable sealing performance. It effectively prevents leakage. The specifications cover DN6–DN50, and the volume is small, making it suitable for pipe galleries and equipment pipelines with limited space. Compared to socket branch pipe seats, it is easy to disassemble and assemble, and there is no need for hot work during later maintenance and replacement of instrument pipelines, significantly reducing on-site construction risks. It is the standard preferred pipe fitting for instrument sampling and small flow branch points.
316L Stainless Steel Threaded Olet Drawing
316L Chemical Composition and Mechanical Properties
Factory and Product Pictures
316L Stainless Steel Threaded Olet Product Pictures
316L PMI spectral testing proves
Video of a customer visiting us
Product processing
316L Stainless Steel Threaded Olet Product Processing
1. Raw material cutting inspection
Select A105 and 304/316 stainless steel forgings for round bars, verify the material quality certificate; calculate the billet size according to the pipe specification, cut the bars with a sawing machine, clean the end burrs, inspect the outer diameter and length tolerances of the billets, and reject any non-compliant materials directly.
2. High-temperature die forging
Send the billet to the heating furnace to heat up to the forging process temperature, perform overall die forging with a hydraulic forging machine, forming the main body of the conical section, the main pipe fitting to fit the arc surface, and the reserved base for the threaded inner hole; conduct normalizing / annealing heat treatment after forging to eliminate internal forging stress, refine metal grains, and enhance pressure-bearing toughness.
3. Rough machining of the base
Use a CNC lathe to rough machine the outer conical surface, the bottom fitting arc, and the inner hole base, remove the forging oxide scale, reserve machining allowance, correct coaxiality, and unify the basic dimensions of the pipe fittings.
4. Fine machining + thread processing
Fine machine the outer surface, welding bevels, inner wall steps, ensure a tight fit between the arc surface and the main pipe fitting; use a dedicated thread machining lathe to process the NPT standard conical pipe internal thread, strictly control the thread profile, taper, and depth, and conduct piece-by-piece inspection of the thread sealingity with a thread gauge.
5. Non-destructive testing
5. Non-destructive testing
Complete magnetic particle / penetrant non-destructive testing to screen for cracks, pores, etc. generated during forging and machining; conduct secondary full inspections of dimensions, threads, and wall thickness, and eliminate pressure-bearing hazards. 6. Polishing, marking, rust prevention and storage Polish the surface of the pipe fittings to brighten them, remove knife marks and scratches; laser engrave the material, pressure rating, specification furnace number; apply rust prevention oil to carbon steel parts, perform passivation treatment on stainless steel, sort and pack them for storage.
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 quality certificate 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
Company Profile
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 to ensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management and Craftsmanship."
316L Stainless Steel Threaded Olet 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,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
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,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
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