Exterior

The   surface should be smooth and flat, no cracks, bubbles, peeling, obvious   impurities, serious cold spots, uneven color, decomposition and discoloration   are not allowed

Size

Meet   the requirements of BS 4346, Clause 3.3, Table 1

Oven   test

Test   temperature: test time

e≤3mm3mm＜e≤10mm10mm＜e≤20mm20mm＜e≤30mm30mm＜e≤40mme＞40mm

150±2℃   15min30min60min140min220min240min

No serious bubbles, delamination   or weld line cracks are required

Vika

≥74℃

Internal   pressure

dn＜160mm,   20℃, pressure 4.2xPN, 1hdn≥160mm, 20℃, pressure 3.36xPN, 1h, no cracks are   required

Marking

Comply   with 13.2 in the BS EN ISO 1452-3:2009 standard, and require standard number,   trademark, size, raw material, PN value, use W/P

Hygiene

Fitting has to fulfil   KTW-recommendations

Yes

Documentation

1 x per year

Material acc. work sheet W 270 and   organoleptic test following KTW-recommendations 

Yes

Documentation

check of doc

Raw material (PP-R)

Long-term behaviour acc. ISO 9080 and   table 7

Normally by test report

No

No

Melt mass-flow rate (MFR) 190/5 <   0.2 g/10 min（

Yes

1 x per week

2 x per year

Hydrostatic pressure tests

At 20°C, 1 hour, 6.40MPa , no burst ,no   leakage20°C。At 95°C, 1000 hour, 1.40MPa , no   burst ,no leakage95°C。

Yes

1 x per month 20°C/6.40 MPa /≥1h

2 x per year

Dimension and tolerance

Acc. to the tables of DIN 16962and EN   10226-1

Yes

Continuously

2 x per year

Tightness under pressure   cycling

Tight after 10,000 cycles (30   cycles/min) at 20 °C between 1 and 25 bar

Yes

No

No

Thermal cycling 

Tight after 5,000 cycles (1 cycle = 30   min) between  20 °C and 93 °C,10 bar   internal pressure10 bar

Yes

No

No

Bending

Tight under bending with 8xd at 18 °C /   15 bar/ ≥ 1 h18 °C

Yes

No

No

Marking

Min.: DVGW and reg. no., PP-R, pipe-Ø,   thread- Ø system name

Yes

Continuously

2 x per year

Homogeneity

≤ 0.02 mm² / evaluation on microtome   with 10 μm,   scale of enlargement 75-100, determined surface min. 100 mm²

Yes

1 x per week

2 x per year