Steel‑sheathed, externally pressurized, directly buried expansion joint

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Category:

Thermal Pipeline Compensator

Product Inquiries:

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Instructions for Use:

This product consists of structural components such as a corrugated pipe that withstands external pressure, an outer tube and end rings, a steel outer casing, and insulation material.

This type of compensator is primarily used to absorb axial displacement and cannot withstand the thrust generated by bellows pressure; it is suitable for direct burial applications where the groundwater table is relatively high.

Model Example:

Product Selection Table (1)

Design pressure: 1.6 MPa

Serial Number	Product Code	Nominal Diameter (mm)	Maximum radial dimension (mm)	Axial Compensation Amount (mm)	Axial stiffness (N/mm)	Applicable Temperature (°C)	Inner Tube and Outer Tube Dimensions (mm)	Product Length (mm)
1	16ZHWGTG300×100-J	DN300	740	100	294	-20°C to 300°C	(Tube) Φ325×8	1700
2	16ZHWGTG300×200-J	DN300	740	200	147	-20°C to 300°C	(Outer) Φ525×8	2100
3	16ZHWGTG350×100-J	DN350	810	100	412	-20°C to 300°C	(Tube) Φ377×8	1700
4	16ZHWGTG350×200-J	DN350	810	200	206	-20°C to 300°C	(Outer) Φ577×8	2100
5	16ZHWGTG400×130-J	DN400	860	130	452	-20°C to 300°C	(Tube) Φ426×8	1700
6	16ZHWGTG400×260-J	DN400	860	260	226	-20°C to 300°C	(Outer) Φ626×8	2100
7	16ZHWGTG500×130-J	DN500	960	130	466	-20°C to 300°C	(Terminal) Φ530×8	1700
8	16ZHWGTG500×260-J	DN500	960	260	233	-20°C to 300°C	(Outer) Φ729×8	2100
9	16ZHWGTG600×150-J	DN600	1150	150	590	-20°C to 300°C	(Top) Φ630×10	1900
10	16ZHWGTG600×300-J	DN600	1150	300	295	-20°C to 300°C	(Outer) Φ830×10	2300
11	16ZHWGTG700×50-J	DN700	1250	150	634	-20°C to 300°C	(Top) Φ720×10	1900
12	16ZHWGTG700×300-J	DN700	1250	300	317	-20°C to 300°C	(Outer) Φ920×10	2300
13	16ZHWGTG800×150-J	DN800	1350	150	658	-20°C to 300°C	(Top) Φ820×12	1900
14	16ZHWGTG800×300-J	DN800	1350	300	329	-20°C to 300°C	(Outer) Φ1020×12	2300
15	16ZHWGTG900×150-J	DN900	1450	150	704	-20°C to 300°C	(Top) Φ920×12	1900
16	16ZHWGTG900×300-J	DN900	1450	300	352	-20°C to 300°C	(External) Φ1120×12	2300
17	16ZHWGTG1000×175-J	DN1000	1550	175	748	-20°C to 300°C	(Top) Φ1020×14	1900
18	16ZHWGTG1000×350-J	DN1000	1550	350	374	-20°C to 300°C	(Outer) Φ1220×14	2300
19	16ZHWGTG1200×175-J	DN1200	1760	175	770	-20°C to 300°C	(Top) Φ1220×14	1900
20	16ZHWGTG1200×350-J	DN1200	1760	350	385	-20°C to 300°C	(Outer) Φ1420×14	2300
21	16ZHWGTG1400×175-J	DN1400	1980	175	950	-20°C to 300°C	(Top) Φ1420×14	1900
22	16ZHWGTG1400×350-J	DN1400	1980	350	475	-20°C to 300°C	(External) Φ1620×14	2300
23	16ZHWGTG1600×175-J	DN1600	2200	175	1344	-20°C to 300°C	(Top) Φ1620×16	1900
24	16ZHWGTG1600×350-J	DN1600	2200	350	672	-20°C to 300°C	(Outer) Φ1820×16	2300

Product Selection Table (Part 2)

Design pressure: 2.5 MPa

Serial Number	Product Code	Nominal Diameter (mm)	Maximum pipe diameter (mm)	Axial Compensation Amount (mm)	Axial stiffness (N/mm)	Applicable Temperature (°C)	接管 and outer pipe dimensions (mm)	Product Length (mm)
1	25ZHWGTG300×100-J	DN300	740	100	350	-20°C–300°C	(Tube) Φ325×10	1700
2	25ZHWGTG300×200-J	DN300	740	200	175	-20°C–300°C	(External) Φ525×10	2100
3	25ZHWGTG350×100-J	DN350	810	100	420	-20°C–300°C	(Tube) Φ377×10	1700
4	25ZHWGTG350×200-J	DN350	810	200	210	-20°C–300°C	(Outer) Φ577×10	2100
5	25ZHWGTG400×130-J	DN400	860	130	486	-20°C–300°C	(Tube) Φ426×10	1700
6	25ZHWGTG400×260-J	DN400	860	260	243	-20°C–300°C	(Outer) Φ626×10	2100
7	25ZHWGTG500×130-J	DN500	960	130	562	-20°C–300°C	(Terminal) Φ530×10	1700
8	25ZHWGTG500×260-J	DN500	960	260	281	-20°C–300°C	(Outer) Φ730×10	2100
9	25ZHWGTG600×150-J	DN600	1150	150	846	-20°C–300°C	(Top) Φ630×12	1900
10	25ZHWGTG600×300-J	DN600	1150	300	423	-20°C–300°C	(Outer) Φ830×12	2300
11	25ZHWGTG700×150-J	DN700	1250	150	850	-20°C–300°C	(Top) Φ720×12	1900
12	25ZHWGTG700×300-J	DN700	1250	300	425	-20°C–300°C	(Outer) Φ920×12	2300
13	25ZHWGTG800×150-J	DN800	1350	150	870	-20°C–300°C	(Terminal) Φ820×14	1900
14	25ZHWGTG800×300-J	DN800	1350	300	435	-20°C–300°C	(Outer) Φ1020×14	2300
15	25ZHWGTG900×150-J	DN900	1450	150	932	-20°C–300°C	(Top) Φ920×16	1900
16	25ZHWGTG900×300-J	DN900	1450	300	466	-20°C–300°C	(Outer) Φ1120×16	2300
17	25ZHWGTG1000×175-J	DN1000	1550	175	1078	-20°C–300°C	(Top) Φ1020×18	1900
18	25ZHWGTG1000×350-J	DN1000	1550	350	539	-20°C–300°C	(Outer) Φ1220×18	2300
19	25ZHWGTG1200×175-J	DN1200	1760	175	1246	-20°C–300°C	(Top) Φ1220×20	1900
20	25ZHWGTG1200×350-J	DN1200	1760	350	623	-20°C–300°C	(Outer) Φ1420×20	2300
21	25ZHWGTG1400×175-J	DN1400	1980	175	1408	-20°C–300°C	(Top) Φ1420×22	1900
22	25ZHWGTG1400×350-J	DN1400	1980	350	704	-20°C–300°C	(External) Φ1620×22	2300
23	25ZHWGTG1600×175-J	DN1600	2200	175	1938	-20°C–300°C	(Top) Φ1620×24	1900
24	25ZHWGTG1600×350-J	DN1600	2200	350	969	-20°C–300°C	(Outer) Φ1820×24	2300