EN 10253-2 Type B P265GH · Carbon Steel 265 MPa · ≤400°C

1.0425 (P265GH) Pipe Fittings

Deutsche Version: Formstücke aus P265GH (1.0425)

EN 10253-2 Type B buttweld pipe fittings in 1.0425 — P265GH carbon steel. A step above P235GH in minimum yield strength (265 MPa vs 235 MPa), with higher allowable stress in design calculations and service rated to 400°C. Widely used in European boiler fabrication, pressure vessels, and heat exchanger piping where higher design pressure requires the increased allowable. Common on German TÜV-approved pressure system drawings.

Min Yield Strength

265 MPa

Max Service Temp

400°C

vs P235GH

+30 MPa yield

P235GH vs P265GH vs 1.0566

Grade	W.Nr.	Min Yield (MPa)	C max	Max Temp	When to Choose
P235GH	1.0345	235	0.16%	300°C	General pressure piping — lowest cost
P265GH	1.0425	265	0.20%	400°C	Higher design pressure; European boiler duty

Applications

European boiler and pressure vessel piping at elevated pressure and temperature
Heat exchanger headers and shell-side nozzles
Steam and hot water systems operating above P235GH allowables
Industrial gas distribution at higher pressures
TÜV-approved pressure piping systems throughout Germany and Central Europe

Cross-References

W.Nr.	1.0425
EN Name	P265GH
ASTM Nearest	A234 WPB (similar)
Standard	EN 10253-2 Type B

Welding

Filler: ER70S-6 or E7018. Preheat 100°C for t >20mm. PWHT at 580–620°C when required by code.

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Testing & Inspection

✓ Chemical analysis against EN 10216-2 / EN 10253-2
✓ Tensile test, with impact test where the standard or your order requires it
✓ Impact test where your specification or PED category requires it
✓ PMI (positive material identification) on every order
✓ Visual and dimensional inspection to EN 10253
✓ NDT (UT, RT, MT or PT) when your order or code calls for it
✓ EN 10204 3.1 certificate as standard; 3.2 with TÜV, Lloyd's Register, Bureau Veritas, DNV or your own inspector

Size Range

DN15–DN600 and larger. Outside diameters follow the EN 10220 / EN ISO 1127 pipe series; wall thickness is matched to your connecting pipe.

Size	OD (mm)
DN 15	21.3
DN 20	26.9
DN 25	33.7
DN 32	42.4
DN 40	48.3
DN 50	60.3
DN 65	76.1
DN 80	88.9
DN 100	114.3
DN 125	139.7
DN 150	168.3
DN 200	219.1
DN 250	273.0
DN 300	323.9
DN 350	355.6
DN 400	406.4
DN 450	457.0
DN 500	508.0
DN 600	610.0

Export Documents & Packing

✓ Commercial invoice, packing list and certificate of origin
✓ EN 10204 certificates with heat-number traceability
✓ PED 2014/68/EU and AD 2000-Merkblatt W0 documentation for European projects
✓ Seaworthy wooden cases or pallets, bevel ends protected, marked to your instructions
✓ FOB, CFR or CIF delivery terms

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Frequently Asked Questions: P265GH (1.0425) Fittings

What is the difference between P265GH (1.0425) and P235GH (1.0345)?

P265GH has a higher minimum yield strength (265 MPa vs 235 MPa) and a higher service rating (about 400°C vs 300°C), so it is common in boiler fabrication, pressure vessels and heat exchangers.

Is PWHT needed for P265GH fittings?

Only when the design code requires it; when it is, PWHT is carried out at 580–620°C.

Which certificates come with P265GH fittings?

EN 10204 3.1 as standard, or 3.2 with third-party inspection, plus PED documentation for European pressure equipment projects.