En 10216-1 Carbon Steel P235gh, P265gh, P295gh, P355gh for Seamless Pressure Pipes

• Customization: Available
• After-sales Service: as Per Client's Design
• Warranty: 1 Years
• Model NO.: EN10216-1 Carbon Steel Pipe P235GH, P265GH, P295GH
• Type: Seamless
• Technique: Forged/ Hot Press
• Material: Carbon Steel
• Surface Treatment: Sliver/Black
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose, Heat Transfer
• Section Shape: Round
• Steel Grade: P235tr1/P235tr2/P195tr1/P195tr2/P265tr1/P265tr2
• Size: 1/4"-4"/Custom
• Testing: Hydrostatic, Ultrasonic (Ut), Tensile, Impact
• Shape: Round/Customized
• Process: Hot Rolled/Cold Drawn
• Tolerance: ±5%
• End: Plain End/Bevel End
• Test: BV, SGS Is Available
• Stock: Size Can Customized
• Processing: Customized
• Thickness: 1-150mm
• Used: Factory, Decoration, Food
• Packing: Standard Export Packing
• Certificate: CE, Bis, JIS, ISO9001
• Delivery Time: 10-30 Working Days
• Transport Package: Woven Bag/Wooden Case
• Specification: SCH 5S-SCH160
• Trademark: EZS
• Origin: China
• Production Capacity: 10000 Ton/Year

Product Description

Product Description

Property	P235GH	P265GH	P295GH	P355GH
Standard	EN 10216-1	EN 10216-1	EN 10216-1	EN 10216-1
Equivalent ASTM	A106 Gr. A	A106 Gr. B
C (max)	0.16%	0.20%	0.20%	0.22%
Mn (max)	1.20%	1.40%	1.40%	1.60%
P (max)	0.025%	0.025%	0.025%	0.025%
S (max)	0.020%	0.020%	0.020%	0.020%
Tensile (MPa)	360-480	410-530	440-570	490-630
Yield (MPa)	≥235	≥265	≥295	≥355
Elongation (min)	25%	24%	23%	22%
Impact Test Temp	-10°C (Optional)	-10°C (Optional)	-20°C (Optional)	-20°C (Optional)
Max Temp (Continuous)	350°C	400°C	425°C	450°C
Pressure Rating	Low-Medium	Medium	Medium-High	High
Typical Applications	Low-pressure steam, water lines	Medium-pressure boilers, process piping	High-pressure steam, oil/gas transmission	Power plant headers, high-stress piping

 

Key Technical Notes:

1. Strength Progression

   • P235GH → P355GH: Increasing carbon/manganese content enhances strength but reduces weldability

   • Yield strength increases by ~50% from P235GH to P355GH

2. Weldability Considerations

   • P235GH: Best weldability (lowest carbon equivalent = ~0.35)

   • P355GH: Requires preheat (>75°C) for thick sections (CE ~0.45)

   • All grades require post-weld heat treatment (PWHT) for thicknesses >35mm

3. Temperature Limitations

   • P235GH/P265GH: Not recommended for service >400°C (graphitization risk)

   • For >450°C service, consider 13CrMo4-5 (EN 10216-2) alloy steel

4. Impact Testing

   • "GH" suffix indicates suitability for elevated temperatures

   • "NL" grades (e.g., P355NL) are Charpy tested at -50°C for low-temp service

5. Dimensional Tolerances

   • OD: ±0.75% (hot-finished), ±0.5% (cold-drawn)

   • WT: +15%/-10% (standard), +10%/-5% (special tolerance)

 

Grade Selection Guide

Application	Recommended Grade	Reason
Low-pressure water pipelines	P235GH	Cost-effective
Medium-pressure steam boilers	P265GH	Balanced strength/weldability
High-pressure oil transmission	P295GH	Better strength than P265GH
Power plant steam headers	P355GH	Highest strength in EN 10216-1

 

Comparison with International Standards

EN 10216-1	ASTM Equivalent	Key Difference
P235GH	A106 Gr.A	Stricter P/S limits in EN
P265GH	A106 Gr.B	EN requires lower S content
P355GH	5L X52	EN has mandatory impact testing options

 

Quality Control Requirements

1. Mandatory Tests:

   • Hydrostatic (test pressure = 70 bar for 10 sec)

   • Ultrasonic examination (for WT ≥6mm)

   • Tensile testing (each heat)

2. Optional Tests:

   • Charpy V-notch (for NL grades or client request)

   • Hardness testing

   • PMI (positive material identification)

 

 

 

Detailed Photos

 

 

Processing of Production