JS FITTINGS

In the world of large-scale infrastructure and industrial fluid transport, SSAW (Spiral Submerged Arc Welded) carbon steel pipe is the popular choice of steel pipe. However, selecting the right specifications and understanding the nuances of spiral-welded technology can be complex for many project managers and procurement specialists. At JS FITTINGS, we specialize in manufacturing high-quality SSAW pipes that meet rigorous international standards(API 5L, ASTM). We’ve compiled this expert FAQ guide covering everything you need to know about SSAW carbon steel pipes.

What is SSAW Carbon Steel Pipe?

What are the common manufacturing standards for SSAW pipes?

Depending on your project’s application, SSAW pipes must adhere to specific global standards to ensure safety and durability.

At JS FITTINGS, we manufacture according to:

API 5L (PSL1, PSL2): The gold standard for oil and gas pipelines (Grades B through X80).

ASTM A53: Standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded, and seamless.

ASTM A252: Ideal for piling pipes used in construction.

EN10219: Cold-formed welded structural hollow sections.

AWWA C200: Specifically for water steel pipelines.

Click here to get SSAW Steel Pipe: Standards, Technical, and Specifications

How does SSAW compare to LSAW pipe?

This is one of the most frequent questions we receive.

While both are submerged arc welded, the differences are key:

Production Process: SSAW uses a spiral seam, whereas LSAW (Longitudinal Submerged Arc Welded) uses a straight longitudinal seam.

Diameter Range: SSAW excels in large diameters (up to 3000mm+) at a more cost-effective price point.

Flexibility: SSAW machines can produce various pipe diameters from the same width of steel strip, offering greater manufacturing flexibility.

Stress Distribution: In SSAW pipes, the weld stress is lower than in LSAW because the weld line is longer and the stress is distributed across the spiral.

More details about the difference, click here: Differences Between SSAW, LSAW and ERW Steel Pipe

What are the primary applications of SSAW pipes?

Due to their high structural strength and cost-efficiency in large sizes, SSAW carbon steel pipes are widely used in:

Water Transmission: Main trunk lines for municipal water supply and drainage.

Oil & Gas: Transporting natural gas and petroleum (especially for low-to-medium pressure lines).

Structural Piling: Foundation piling for bridges, ports, and high-rise buildings.

Dredging: Slurry and sand transport in maritime engineering.

Can SSAW pipes be customized with anti-corrosion coatings?

Absolutely.

Carbon steel is susceptible to rust, so protective coatings are essential for underground or underwater applications. We offer several options:

3PE (Three-Layer Polyethylene): The most common coating for oil and gas.

FBE (Fusion Bonded Epoxy): Excellent for preventing corrosion in harsh chemical environments.

Cement Mortar Lining: Standard for potable water pipes.

Bitumen/Coal Tar Enamel: Traditional cost-effective anti-corrosion.

What quality control tests should I expect?

A reliable manufacturer should provide a comprehensive Mill Test Certificate (MTC). At JS Steel Pipes, our SSAW pipes undergo:

Hydrostatic Testing: Ensuring the pipe can handle the rated pressure without leaking.

X-Ray Inspection: Checking the internal integrity of the spiral weld.

Ultrasonic Testing (UT): Detecting any internal flaws or thickness variations.

Tensile & Impact Testing: Verifying the mechanical properties of the steel grade.

Why choose JS FITTINGS as your project steel pipe supplier?

With decades of experience in the steel industry, we understand that reliability is non-negotiable.

Full Range of Sizes: We cover the spectrum from medium to ultra-large diameters.

Strict Compliance: Our facility is API and ISO certified, ensuring every meter of pipe meets your project’s technical requirements.

Global Logistics: We have a proven track record of shipping to major ports worldwide, ensuring your project stays on schedule.

One-Stop Solution: From raw material sourcing to final coating and shipping, we manage the entire value chain.

Conclusion

Selecting the right SSAW carbon steel pipe involves balancing technical specifications, budget, and longevity. Whether you are building a bridge foundation or a cross-country water pipeline, the quality of your pipe is the foundation of your project’s success.

Looking for a quote or technical consultation for your next project?

Visit our product page at jssteelpipes.com/products or contact our engineering team directly. Let’s build something strong together.

[email protected] 

What is Forged Pipe Fitting?

Technical Specifications for Forged Pipe Fittings

ParameterIndustry Specifications & Standards Manufacturing StandardsASME B16.11 (Core Standard), MSS SP-79, MSS SP-83, MSS SP-95, BS 3799Connection TypesSocket Weld (SW) and Threaded / Screwed (NPT, BSPT, BSPP conforming to ASME B1.20.1)Pressure Ratings / ClassesThreaded Fittings: 2000 LBS, 3000 LBS, 6000 LBS Socket Weld Fittings: 3000 LBS, 6000 LBS, 9000 LBSAvailable Product Types45°/90° Forged Elbows, Street Elbows, Equal/Reducing Tees, Crosses, Full/Half Couplings, Reducing Couplings, Pipe Caps, Hex/Square/Round Plugs, Hex Bushings, Flush Bushings, Hex Nipples, Unions (MSS SP-83)Branch Outlet Fittings (Branchlets)Weldolet, Threadolet, Sockolet, Elbolet, Latrolet, Nipolet (Conforming to MSS SP-97)Size Range Capacity1/8″ to 4″ (DN6 – DN100) Nominal Pipe SizeCarbon Steel Forged GradesASTM A105 (Most Common), ASTM A350 LF2 (Low Temp), ASTM A694 F42/F52/F60/F65 (High Yield)Stainless Steel Forged GradesASTM A182 F304/304L, ASTM A182 F316/316L, F321, F347, F51 (Duplex), F53 (Super Duplex)Alloy Steel Forged GradesASTM A182 F11, F22, F5, F9, F91 (High-Temperature Chrome-Moly)

Frequently Asked Questions About Forged Pipe Fittings

Q: What is the difference between Socket Weld (SW) and Threaded forged fittings?

A: The primary difference lies in the sealing mechanism and application safety. Socket Weld fittings require a fillet weld to connect to the pipe, offering a permanent, leak-proof, and stronger joint ideal for toxic, flammable, or high-pressure systems. Threaded fittings rely on complementary pipe threads (like NPT) for connection, allowing for easy disassembly, non-welded installation, but are more prone to dynamic load leaks and restricted in critical hazardous services.

Q: What does “3000 LBS” or “3000#” mean in forged fittings?

A: 3000 LBS (or Class 3000) represents the pressure rating class of the forged fitting, not its maximum working pressure in PSI. It indicates the fitting is structurally matched to perform safely with specific high-pressure pipe schedules (e.g., Class 3000 Socket Weld fittings match with Schedule 80 / XS pipes, while Class 6000 matches with Schedule 160 pipes).

Q: What are Branch Outlets (Olets) and when are they used?

A: Branch Outlets (such as Weldolets, Threadolets, and Sockolets) are forged integrally reinforced fittings used to provide a 90-degree branch connection from a larger run pipe to a smaller branch pipe. They are utilized as an alternative to reducing tees when the run pipe is significantly larger than the branch, saving space, welding time, and reducing stress concentration.

Q: How do you inspect the quality of ASME B16.11 forged fittings before shipment?

A: Premium forged fittings must pass a strict four-point quality assurance protocol before leaving the factory:

Thread & Socket Gauging: Threaded fittings must be verified using precise Go/No-Go plug gauges to ensure NPT/BSPT compliance. Socket depths and diameters must meet ASME B16.11 tolerances.

Hardness Testing: Conducted particularly on alloy steel (e.g., F11, F22) and stainless steel batches to verify heat treatment effectiveness.

Positive Material Identification (PMI): Utilizing handheld X-ray fluorescence (XRF) alloy analyzers to verify exact chemical compositions (Cr, Ni, Mo content) for stainless and alloy grades.

Visual and Geometric Check: Inspecting for forging folds, scale, sharp burrs, and ensuring proper rust-proof oil coating or hot-dip galvanizing.

Q: Where are forged steel pipe fittings typically applied?

A: Due to their high mechanical strength, forged fittings are mandatory in high-stress, high-pressure, and hazardous piping systems, including:

Hydraulic & Pneumatic Systems: High-pressure fluid power lines and control loops.

Chemical & Petrochemical Industry: Transporting highly corrosive, acidic, or volatile process chemicals.

Oil & Gas Sector: High-pressure gas gathering lines, refinery manifolds, and offshore drilling platforms.

Steam & Power Plants: Superheated steam distribution lines, boiler piping, and high-pressure feed water networks.

Why Choose RAYOUNG/JS FITTINGS for Your Forged Pipe Fittings?

Compliant with EN 10204 3.1 & Full Traceability: We provides 100% original Mill Test Certificates (MTC) mapping back to the steel mill’s heat numbers, guaranteeing absolute chemical and mechanical compliance.

Precision Threading Equipment: Our CNC machining lines utilize advanced thread-cutting tools to ensure zero-defect NPT, BSPT, or BSPP connections, eliminating on-site installation alignment issues.

Extensive Stock for Quick Turnaround: We carry a comprehensive ready-to-ship stock of Class 3000 ASTM A105 and A182 F316L standard elbows, tees, and unions, compressing shipping preparation to 7-14 days.

Anti-Corrosion Surface Excellence: All carbon steel forged fittings undergo premium surface passivation, including deep black phosphating, rust-preventative oiling, or Hot-Dip Galvanizing (HDG) to prolong service life in coastal or high-humidity environments.

Please contact us if you have any questions or inquirements for buttweld pipe fittings.inquiries

+86-18003119682

What is a Butt Weld Pipe Fitting?

Technical Specifications for Butt Weld Fittings

ParameterIndustry Specifications & StandardsManufacturing StandardsASME B16.9, MSS SP-75, EN 10253-1/2, DIN 2605, JIS B2311Available Product Types45°/90°/180° Long Radius (LR) & Short Radius (SR) Elbows, 3D/5D/8D pipe bends Equal Tees, Reducing Tees, Concentric Reducers, Eccentric Reducers, Pipe Caps, Crosses, Stub EndsSize Range CapacitySeamless: 1/2″ to 24″ (DN15 – DN600) Welded (Two-half / Seam): 26″ to 72″ (DN650 – DN1800) or customWall Thickness SchedulesSCH 10S, SCH 20, SCH 40, STD, SCH 80, XS, SCH 160, XXS (Fully conforming to ASME B36.10 / B36.19)Carbon Steel GradesASTM A234 WPB (Most Common), WPC, ASTM A420 WPL6 (Low Temperature), ASTM A860 WPHY 42/52/60/65/70 (High Yield)Stainless Steel GradesASTM A403 WP304/304L, WP316/316L, WP321, WP347Alloy Steel GradesASTM A234 WP11, WP22, WP5, WP9, WP91 (High Temperature & Pressure)Edge PreparationBeveled Ends (Factory-beveled to ASME B16.25, protecting root pass preparation)

Frequently Asked Questions About Butt Weld Fittings

Q: What is the differences between seamless and welded butt weld fittings?

A: The primary difference lies in the raw material and pressure capacity. Seamless butt weld fittings are manufactured from seamless steel pipes and have no welds, ensuring higher pressure ratings and complete structural homogeneity for critical environments. Welded butt weld fittings are formed from steel plates or welded pipes, making them more cost-effective and the ideal choice for large diameters ranging from 26″ to 72″.

Q: Why is ASTM A234 WPB the most common grade for pipe fittings?

A: ASTM A234 WPB is the industry baseline standard because it offers the optimal balance of tensile strength, weldability, and cost efficiency for moderate to high-temperature piping systems. It is universally compatible with standard ASTM A106 Grade B and ASTM A53 carbon steel pipes.

Q: When should I choose a Long Radius (LR) Elbow over a Short Radius (SR) Elbow?

A: You should choose a Long Radius (LR) Elbow (Radius = 1.5D) when your system requires minimum flow resistance, lower pressure drops, and reduced friction erosion. A Short Radius (SR) Elbow (Radius = 1.0D) should only be used when space limitations are extremely tight and a compact piping layout is mandatory.

Q: What essential quality control tests must be conducted before buying butt weld fittings?

A: To ensure strict project compliance, every butt weld fitting batch must undergo the following four-step quality verification:

Dimension Inspection: Checking outside diameter (OD), inside diameter (ID), wall thickness (WT), and bevel angle according to ASME B16.9.

Chemical & Mechanical Analysis: Verifying carbon equivalent, tensile strength, yield strength, and elongation through spectral testing.

Non-Destructive Testing (NDT): Utilizing Radiographic Testing (RT) for welded joints and Ultrasonic Testing (UT) or Magnetic Particle Testing (MT) to detect internal/surface cracks.

Visual Surface Inspection: Ensuring the fitting is free of scale, deep pits, laminations, and sharp sharp notches, finished with rust-preventative oil or black painting.

Q: What are the main industrial application fields for butt weld pipe fittings?

A: Butt weld pipe fittings are utilized where leak prevention and seamless interior flow are mandatory, including:

Oil & Gas Refineries: For upstream drilling pipelines and downstream chemical distillation loops.

Power Generation Industry: High-pressure steam pipelines, boiler supply systems, and cooling towers.

Chemical & Petrochemical Processing: Transporting aggressive chemicals, acids, and volatile hydrocarbons.

Marine & Shipbuilding: Seawater cooling systems, fuel delivery lines, and ballast systems.

Why Source Your Butt Weld Fittings from RAYOUNG/JS FITTINGS?

100% Traceable EN 10204 3.1 Certification: We provide fully certified and original Mill Test Certificates (MTC) with every delivery, ensuring raw material trace-back down to the heat number.

Massive Raw Material Stock: We maintain a permanent warehouse inventory of premium raw materials (ASTM A234 WPB pipes and plates), compressing our production lead times to 15-25 days for urgent projects.

Custom Fabrication Capabilities: We specializes in non-standard wall thicknesses, heavy wall schedules (like SCH XXS), and large-diameter custom dimensions up to 72 inches.

Third-Party Inspection Friendly: We fully welcome and facilitate pre-shipment inspections from global authorities including SGS, BV, TUV, and Lloyd’s Register.

Please contact us if you have any questions or inquirements for buttweld pipe fittings.inquiries

+86-18003119682

In the world of heavy-duty industrial infrastructure, not all steel pipes are created equal. When projects demand high-pressure resistance, thick walls, and large diameters, LSAW (Longitudinal Submerged Arc Welded) steel pipe stands as the primary choice for engineers and procurement specialists globally.

At JS FITTINGS, we have spent decades supplying critical energy and construction projects. In this guide, we break down everything you need to know about LSAW pipes, from manufacturing nuances to choosing the right supplier.

What is LSAW Steel Pipe?

LSAW steel pipe is produced by using a single wide steel plate as the raw material. The plate is molded (usually through the JCOE or UOE process) into a V-shape, then a U-shape, and finally an O-shape, before being welded using double-sided submerged arc welding technology.

Key Specifications and Materials

To ensure project safety, LSAW pipes must adhere to rigorous international standards. At JS FITTINGS, our production lines are calibrated to meet:

API 5L (PSL1 & PSL2): The industry standard for oil and gas line pipes, ranging from Grade B to high-strength X70 or X80.

ASTM Standards: Including ASTM A671 and A672 for high-pressure service at atmospheric and lower temperatures.

Size Range: Typically available in outer diameters (OD) from 16″ (406mm) to 60″ (1524mm), with wall thicknesses up to 50mm or more.

Common Materials include:

Carbon Steel: Gr.B, X42, X52, X60, X65, X70.

Alloy Steel: For specialized corrosive or high-heat environments.

The Comparison: LSAW vs. SSAW vs. ERW Steel pipes

Choosing the wrong welding method can lead to catastrophic project failure or unnecessary budget inflation. Here is how LSAW compares to its counterparts:FeatureLSAWSSAW (Spiral)ERWWeld SeamLongitudinal (Straight)SpiralLongitudinal (High-Freq)Diameter RangeLarge (Up to 60″+)LargeSmall to MediumWall ThicknessVery Thick (Max 50mm+)MediumThin to MediumInternal StressLow (due to expansion)HigherMediumMain UseOil/Gas Mainlines, PilingWater, Low-Pressure GasConstruction, Fencing

Why choose LSAW Pipes? 

Advantages of LSAW Steel Pipe

High Strength & Uniformity: The “Expansion” phase in LSAW manufacturing (JCOE) ensures the pipe has excellent dimensional accuracy and reduces internal residual stress.

Large Diameter/Thick Wall: It is the only viable option for ultra-thick wall requirements (e.g., offshore platforms or deep-sea pipelines).

Weld Quality: Submerged arc welding protects the weld pool from atmospheric contamination, resulting in a clean, high-strength bond.

Critical Industrial Applications

LSAW pipes are the “backbone” of heavy industry:

Oil & Gas Mainlines: Long-distance transmission of hydrocarbons under high pressure.

Structural Piling: Serving as foundation piles for bridges, skyscrapers, and offshore wind farms.

Dredging and Water Systems: Heavy-duty slurry transport where durability is non-negotiable.

Chemical Plants: Transporting volatile fluids in large-scale refineries.

Quality Control: Ensuring Project Integrity

At JS FITTINGS, we believe a pipe is only as good as its test report. Our LSAW quality control protocol includes:

UT (Ultrasonic Testing): 100% scanning of the weld seam.

RT (Radiographic Testing): X-ray inspection for critical wall sections.

Hydrostatic Testing: Every pipe is pressurized to ensure leak-proof performance.

MTC (Mill Test Certificate): Full traceability of chemical composition and mechanical properties (Yield, Tensile, Elongation).

How to Choose a Reliable LSAW Steel Pipe Supplier?

Sourcing from China can be complex. To find a partner rather than just a vendor, look for:

Technical Expertise: Can they explain the difference between JCOE and UOE? Do they understand API 5L PSL2 requirements?

Integration: Suppliers like JS FITTINGS provide a “One-Stop” solution. We don’t just supply the pipe; we provide the matching elbows, tees, and flanges, ensuring 100% compatibility across your piping system.

Logistics Capability: Shipping 12-meter LSAW pipes requires specialized break-bulk or container loading expertise to prevent damage to pipe ends.

LSAW Steel Pipe FAQ

Q: Can LSAW pipes be coated? A: Yes. We commonly provide 3LPE, FBE (Fusion Bonded Epoxy), and Liquid Epoxy coatings to prevent corrosion in underground or subsea applications.

Q: What is the typical lead time? A: Depending on the tonnage and specification, LSAW production usually ranges from 20 to 45 days.

Q: Is LSAW more expensive than ERW? A: Generally, yes. The manufacturing process is more intensive, and the raw material (steel plate) is more expensive than the steel coils used for ERW.

Conclusion

When your project involves critical infrastructure, there is no room for compromise. JS FITTINGS combines decades of manufacturing excellence with a deep understanding of the global supply chain. We provide not only high-quality LSAW pipes but the technical consultation required to make your project a success.

Looking for a competitive quote on LSAW Steel Pipes? Contact JS FITTINGS today to speak with our engineering sales team and receive a comprehensive proposal for your next project.

[email protected]

What are WPHY Fittings? 

ASTM A860 WPHY fittings are high-strength, wrought carbon steel butt-weld fittings primarily used in high-pressure oil and gas transmission pipelines. The acronym WPHY stands for Wrought Pipe High Yield. They are designed to match API 5L line pipes and are manufactured according to ASME B16.9 and MSS SP-75 dimensions

Key Grades: WPHY 42, 52, 60, 65, 70

ASTM A860 fittings are categorized by their yield strength to match corresponding API 5L line pipes.

WPHY 42: Min Yield 42,000 psi (Matches API 5L X42)

WPHY 52: Min Yield 52,000 psi (Matches API 5L X52)

WPHY 60: Min Yield 60,000 psi (Matches API 5L X60)

WPHY 65: Min Yield 65,000 psi (Matches API 5L X65)

WPHY 70: Min Yield 70,000 psi (Matches API 5L X70)

Our Supply Range

Grades: ASTM A860 WHPY 42, 46, 52, 56, 60, 65, 70 Outer Diameters: 1/2” to 14” in ASME B16.9, 14” to 48” in MSS-SP-75 Wall Thickness Schedule: SCH 10, SCH 40, SCH 160 comply with ASME B16.9 Pressure Class: Class 150, 300, 600, 900, 1500, 2500 Manufacturing Standards: ASME B16.9, ASME B16.28, MSS-SP-75

For NPS 14 and smaller butt-welding fittings, refer to ASME B16.9. Larger than NPS 14 through NPS 48 shall comply with MSS-SP-75.

Technical Specifications: Chemical & Mechanical Properties

To ensure the safety of high-pressure pipelines, ASTM A860 enforces strict limits on chemical composition and mechanical performance.

1. Chemical Composition Requirements (Percentage)

ElementComposition (Max %)Carbon (C)0.20Manganese (Mn)1.00 – 1.45Phosphorus (P)0.030Sulfur (S)0.010Silicon (Si)0.15 – 0.35Carbon Equivalent (CE)0.42 (Standard)

2. Mechanical Properties Table

GradeYield Strength (Min, ksi)Tensile Strength (ksi)Elongation (Min %)WPHY 525266 – 9120WPHY 606075 – 10020WPHY 656577 – 10220WPHY 707082 – 10718

Common Questions from Industry Professionals (FAQ)

Q1: Why use ASTM A860 instead of ASTM A234 WPB?

Answer: ASTM A234 WPB is a standard carbon steel fitting for moderate pressure. ASTM A860 WPHY fittings offer significantly higher yield strength, allowing for thinner-walled pipes in high-pressure long-distance pipelines without sacrificing safety, which reduces overall project weight and cost.

Q2: What are the Charpy V-Notch Impact Test requirements?

Answer: All ASTM A860 fittings must undergo impact testing. The standard requirement is a minimum of 27 Joules (20 ft-lb) at -50°F (-46°C). This ensures the fittings remain ductile and do not fracture in cold environments or high-stress conditions.

Q3: Are WPHY fittings compatible with API 5L pipes?

Answer: Yes. They are specifically designed for this. For example, if you are using an API 5L X65 pipe, the correct matching fitting is an ASTM A860 WPHY 65 to ensure the entire system maintains a consistent pressure rating.

Manufacturing Process at JS FITTINGS

At JS FITTINGS, our production process for WPHY fittings includes:

Forming: Cold or hot forming depending on size and grade.

Heat Treatment: Essential for high-yield properties. We utilize Normalizing, Quenching, and Tempering to achieve the precise grain structure required for WPHY 60/65/70.

NDE Testing: 100% Ultrasonic Testing (UT) or Magnetic Particle Inspection (MPI) to ensure zero defects.

Conclusion: Reliable High-Yield Solutions

ASTM A860 WPHY fittings are the backbone of modern energy infrastructure. Their ability to withstand extreme pressures and low temperatures makes them indispensable for oil and gas projects.

Looking for a trusted supplier of WPHY 52, 60, or 70 fittings? JS FITTINGS provides full MTR (Mill Test Report) certification, ensuring your project meets all international standards.

Request a Quote for ASTM A860 WPHY Fittings Now

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ASTM A420 is the standard specification for piping fittings of wrought carbon steel and alloy steel, specifically designed for low-temperature service. Whether you are working on LNG terminals, cryogenic applications, or pipelines in arctic climates, understanding the nuances of ASTM A420—particularly the WPL6 grade—is critical for ensuring structural integrity and safety.

In this blog, JS FITTINGS provides a comprehensive technical breakdown of ASTM A420 fittings, covering specifications, chemical composition, and frequently asked questions.

What is ASTM A420?

ASTM A420 covers wrought carbon steel and alloy steel pipe fittings of seamless and welded construction. These fittings are primarily used in pressure piping and pressure vessel service at low temperatures. The most commonly utilized grade is WPL6, which undergoes rigorous Charpy V-notch impact testing to ensure it does not become brittle in freezing environments.

Key Grades under ASTM A420

While A420 includes several grades, the industry standard for most low-temperature projects is:

WPL6: The most common grade, impact tested at -50°F [-45°C].

WPL3: Impact tested at -150°F [-101°C].

WPL8: Impact tested at -320°F [-195°C] (often used for liquid nitrogen/oxygen).

ASTM A420 WPL6 Technical Specifications

To help engineers and procurement managers, here are the essential technical parameters for WPL6 fittings.

1. Chemical Composition (%)

ElementComposition (WPL6)Carbon (Max)0.30Manganese0.50 – 1.35Phosphorus (Max)0.035Sulfur (Max)0.035Silicon0.15 – 0.40

2. Mechanical Properties

PropertyValue (WPL6)Tensile Strength (Min)60 ksi [415 MPa]Yield Strength (Min)35 ksi [240 MPa]Impact Test Temp-50°F [-45°C]

Why Impact Testing Matters for WPL6 Fittings

The defining characteristic of an ASTM A420 WPL6 fitting is the Charpy V-Notch Impact Test. Unlike standard ASTM A234 WPB fittings, WPL6 must prove its “toughness.”

Why? 

In sub-zero temperatures, standard carbon steel undergoes a “ductile-to-brittle transition.” Without proper heat treatment and impact testing, the steel could shatter like glass under pressure. JS Fittings ensures all WPL6 products meet or exceed the impact energy requirements (typically 13 ft·lbf or 18 J for a standard specimen).

Common Types of ASTM A420 Fittings

JS Fittings manufactures a full range of A420 WPL6 butt-weld fittings according to ASME B16.9:

A420 WPL6 Elbows: 45°, 90°, and 180° (Long Radius & Short Radius).

A420 WPL6 Tees: Equal Tees and Reducing Tees.

A420 WPL6 Reducers: Concentric and Eccentric reducers for changing pipe diameters.

A420 WPL6 Caps: For sealing pipe ends in low-temp systems.

ASTM A420 WPL6 vs. ASTM A234 WPB: What is the difference?

A common question from buyers is whether these two are interchangeable.

Temperature: A234 WPB is for moderate to high temperatures; A420 WPL6 is for low temperatures.

Testing: WPL6 requires mandatory Charpy Impact Testing; WPB does not.

Application: Use WPL6 for any environment dropping below -20°F (-29°C).

Frequently Asked Questions (FAQ) – Expert Insights

Q1: What is the temperature limit for WPL6?

Answer: ASTM A420 WPL6 is generally rated for service down to -50°F (-45°C). For temperatures lower than this, grades like WPL3 or WPL8 are required.

Q2: Can WPL6 fittings be welded to A333 Grade 6 pipe?

Answer: Yes. ASTM A420 WPL6 fittings are the standard match for ASTM A333 Grade 6 seamless and welded pipes. They share compatible chemical and mechanical properties.

Q3: What heat treatment is required for A420 fittings?

Answer: All fittings must be heat treated. Standard methods include Normalizing, Normalizing and Tempering, or Quenching and Tempering to grain-refine the steel and optimize low-temperature toughness.

Why Source ASTM A420 Fittings from JS FITTINGS?

As a leading manufacturer, JS Fittings specializes in high-performance piping solutions.

Full Traceability: Every fitting comes with an MTR (Mill Test Report) according to EN 10204 3.1.

Precision Manufacturing: Advanced machining and controlled heat treatment processes.

Global Logistics: Fast shipping for urgent oil & gas repair projects worldwide.

Looking for a quote on ASTM A420 WPL6 Fittings?

The client needed a variety of pipe fittings (ASTM A105, A234) for critical oil and gas pipeline installations that could withstand high-pressure environments without any risk of leakage.

Butt weld Pipe Fittings Leading Manufacturer

Since 1983 | Bulk Supply | Competitive Factory Pricing

we are

a China steel pipe fittings manufacturer who offers a full range fittings of ASME B16.9, ASME B16.28, ASME B16.49, GOST 17375, GOST 30753-2001, GOST 17376, GOST 17378, GOST 17379, EN 10253 butt weld pipe elbow, pipe reducer, pipe tee, pipe cross, pipe bends, and pipe caps.

Material: carbon steel, alloy steel, and stainless steel.

Approved: ISO 9001, GOST-R and CE.

Customized pipe fittings and flanges are also available.

[email protected]

+8618003119682

JS FITTINGS-Carbon Steel Pipe Supplier China

we bulk supply  seamless steel pipes, ERW steel pipes, LSAW and SSAW steel pipes.

2 hours quotation & 7 days delivery

API 5L, ASTM A53, ASTM A519, ASTM A106, ASTM A179, ASTM A335, ASTM A192, ASTM A333, BS3059, DIN1629, DIN17175

We have supply 3080 pieces ASME B16.5 A105 black panting pipe flange to Brazil.

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+8618003119682

Galvanized buttweld steel pipe fitting elbow

Can meet ASME B 16.9、GOST 17375、17376、17378、17379、EN 10253.

China directly factory price

We have established partnerships with globally renowned oil companies such as ADNOC, NI0C, CNPC, and developed authorized distributors across multiple countries.

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+8618003119682

carbon steel buttwel pipe fittings supplier & exporter in China

Since 1983 | Bulk Supply | Competitive Factory Pricing

Your One-Stop Industrial Partner for Custom Pipe Fittings Components

Material: carbon steel, alloy steel, and stainless steel.

Approved: ISO 9001, GOST-R and CE.

Customized pipe fittings and flanges are also available.

Whatsapp/tel: +86-18003119682

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