供EN549认证，EN682认证，DVGW VP 406认证，EN877认证。 材料测试 DIN EN 682, Type G or H 材料测试 DIN EN 682, Type G category L 材料测试 DIN EN 549, seals excl. ozone resistance tests of material and of seals are incl. add. ozone test on seals and test sheets Annex B-tests/Identification references 材料测试 DIN EN 682 and EN 549 incl. ozone test Annex B-tests/Identification references